CN115123189A - Range extender, and control method and device of range extender - Google Patents

Abstract

The invention discloses a range extender, and a control method and a control device of the range extender. The method reduces the adverse effect of the range extender on the vehicle sound vibration roughness caused by the noise caused by overhigh rotating speed when the range extender is increased by increasing the rotating speed of the engine in the conventional mode, controls the output torque of the engine to correspondingly change along with the range extender, and can reduce the effect of the range extender noise on the vehicle sound vibration roughness while ensuring that the range extender reaches the output requirement.

Description

Translated fromChinese

一种增程器、增程器的控制方法和装置A range extender, a range extender control method and device

技术领域technical field

本申请涉及增程器控制的技术领域，尤其涉及一种增程器、增程器的控制方法和装置。The present application relates to the technical field of range extender control, and in particular, to a range extender and a control method and device for a range extender.

背景技术Background technique

混合动力系统是目前最具市场前景的车型，其中增程式动力系统越来受到青睐，相比传统车，通过发动机高效率工作点匹配，大幅降低整车油耗及排放，达成国六/国七排放法规；相比HEV(Hybrid Electric Vehicle，混合动力汽车)与PHEV(Plug-in hybridelectric vehicle，插电式混合动力汽车)混动车型，增程器最大程度降低里程焦虑问题，实现传统车的里程和纯电的驾驶感受。Hybrid systems are the most promising models in the market at present. Among them, extended-range power systems are becoming more and more popular. Compared with traditional vehicles, through the matching of high-efficiency working points of the engine, the fuel consumption and emissions of the whole vehicle are greatly reduced, and the emission of China VI/VII is achieved. Regulations; Compared with HEV (Hybrid Electric Vehicle, hybrid electric vehicle) and PHEV (Plug-in hybridelectric vehicle, plug-in hybrid electric vehicle) hybrid models, the range extender minimizes the problem of mileage anxiety and achieves the mileage and Pure electric driving experience.

在混动架构中，增程器能够提供额外的电能，从而使电动汽车能够增加行驶里程的电动汽车零部件，增程器指发动机与发电机的组合。增程器只用于提供电功率，发动机不参与对车辆机械方式的直接驱动，即增程器与整车的传动机械完全解耦，增程器的工作点与车速没有直接关系。目前增程器的控制策略多采用定点策略和功率跟随策略，造成车辆的声振粗糙度(NVH，Noise、Vibration、Harshness)评价较低。In a hybrid architecture, a range extender refers to the combination of an engine and a generator that provides additional electrical energy to enable an electric vehicle to increase its driving range. The range extender is only used to provide electric power, and the engine does not participate in the direct drive of the vehicle mechanical mode, that is, the range extender is completely decoupled from the transmission machinery of the vehicle, and the operating point of the range extender is not directly related to the vehicle speed. At present, the control strategy of the range extender mostly adopts the fixed-point strategy and the power following strategy, resulting in a low evaluation of the vehicle's acoustic and vibration harshness (NVH, Noise, Vibration, Harshness).

因此，如何降低增程器对车辆声振粗糙度的影响，是目前亟待解决的技术问题。Therefore, how to reduce the influence of the range extender on the acoustic and vibration roughness of the vehicle is a technical problem that needs to be solved urgently at present.

发明内容SUMMARY OF THE INVENTION

本发明的一种增程器、增程器的控制方法和装置，降低了增程器对车辆声振粗糙度的影响。The range extender, the range extender control method and the device of the present invention reduce the influence of the range extender on the acoustic and vibration roughness of the vehicle.

本发明实施例提供了以下方案：The embodiments of the present invention provide the following solutions:

第一方面，本发明实施例提供了一种增程器的控制方法，包括：In a first aspect, an embodiment of the present invention provides a method for controlling a range extender, including:

获取车辆的电池剩余电量和牵引需求功率；Obtain the remaining battery power and traction demand power of the vehicle;

根据所述电池剩余电量和所述牵引需求功率，确定增程器输出的增程功率；Determine the range extender output by the range extender according to the remaining battery power and the traction demand power;

在所述增程功率大于设定的功率阈值时，控制所述增程器的发动机输出扭矩跟随所述增程功率对应变化。When the range extender power is greater than a set power threshold, the engine output torque of the range extender is controlled to change correspondingly with the range extender power.

在一种可选的实施例中，所述控制所述增程器的发动机输出扭矩跟随所述增程功率对应变化，包括：In an optional embodiment, the control of the engine output torque of the range extender to follow the corresponding change of the range extender power includes:

在所述电池剩余电量小于第一电量阈值时，根据所述增程功率与预设的第一对应关系，确定所述发动机的设定扭矩，其中，所述第一对应关系为所述发动机在相同转速下所述输出扭矩与所述增程功率的线性变化关系；When the remaining power of the battery is less than a first power threshold, the set torque of the engine is determined according to the extended range power and a preset first correspondence, wherein the first correspondence is that the engine is in The linear relationship between the output torque and the extended-range power at the same rotational speed;

根据所述设定扭矩，控制所述增程器输出所述增程功率。According to the set torque, the range extender is controlled to output the range extension power.

在一种可选的实施例中，所述根据所述设定扭矩，控制所述增程器输出所述增程功率之后，还包括：In an optional embodiment, after controlling the range extender to output the range extender power according to the set torque, the method further includes:

在所述电池剩余电量小于第二电量阈值时，根据所述发动机的最大扭矩控制所述增程器输出最大功率，其中，所述第二电量阈值小于所述第一电量阈值；When the remaining power of the battery is less than a second power threshold, the range extender is controlled to output the maximum power according to the maximum torque of the engine, wherein the second power threshold is less than the first power threshold;

根据所述最大功率和所述增程功率的差值确定出剩余功率，并将所述剩余功率输出至车辆的动力电池。The remaining power is determined according to the difference between the maximum power and the extended-range power, and the remaining power is output to the power battery of the vehicle.

在一种可选的实施例中，所述根据所述电池剩余电量和所述牵引需求功率，确定增程器输出的增程功率之后，还包括：In an optional embodiment, after determining the range extender output by the range extender according to the remaining battery power and the traction demand power, the method further includes:

获取所述增程功率与发动机控制参数的第二对应关系；obtaining a second correspondence between the extended range power and the engine control parameter;

在所述增程功率不大于设定的功率阈值时，根据所述增程功率和所述第二对应关系，确定发动机的目标控制参数，其中，所述目标控制参数为所述发动机输出所述增程功率时最小燃油量的控制参数；When the extended-range power is not greater than the set power threshold, a target control parameter of the engine is determined according to the extended-range power and the second corresponding relationship, wherein the target control parameter is the output of the engine The control parameter of the minimum fuel quantity when the power is extended;

根据所述目标控制参数，控制所述增程器输出所述增程功率。According to the target control parameter, the range extender is controlled to output the range extender power.

在一种可选的实施例中，所述根据所述目标控制参数，控制所述增程器输出所述增程功率之后，还包括：In an optional embodiment, after controlling the range extender to output the range extender power according to the target control parameter, the method further includes:

在所述增程功率变化时，更新所述目标控制参数；updating the target control parameter when the range-extending power changes;

根据更新后的所述目标控制参数，控制所述增程器输出变化的所述增程功率。According to the updated target control parameter, the range extender is controlled to output the changed range extender power.

在一种可选的实施例中，所述根据所述目标控制参数，控制所述增程器输出所述增程功率，包括：In an optional embodiment, the controlling the range extender to output the range extender power according to the target control parameter includes:

根据所述目标控制参数，确定所述发动机的目标转速和目标扭矩；determining a target rotational speed and a target torque of the engine according to the target control parameter;

根据所述目标转速和所述目标扭矩，控制所述增程器输出所述增程功率。According to the target rotational speed and the target torque, the range extender is controlled to output the range extension power.

第二方面，本发明实施例还提供了一种增程器，所述增程器经第一方面中任一所述的方法进行控制。In a second aspect, an embodiment of the present invention further provides a range extender, where the range extender is controlled by any one of the methods in the first aspect.

第三方面，本发明实施例还提供了一种增程器的控制装置，包括：In a third aspect, an embodiment of the present invention also provides a control device for a range extender, including:

第一获取模块，用于获取车辆的电池剩余电量和牵引需求功率；The first acquisition module is used to acquire the remaining battery power and traction demand power of the vehicle;

第一确定模块，用于根据所述电池剩余电量和所述牵引需求功率，确定增程器输出的增程功率；a first determining module, configured to determine the range extender output by the range extender according to the remaining battery power and the traction demand power;

第一控制模块，用于在所述增程功率大于设定的功率阈值时，控制所述增程器的发动机输出扭矩跟随所述增程功率对应变化。The first control module is configured to control the engine output torque of the range extender to follow the corresponding change of the range extender when the range extender power is greater than a set power threshold.

第四方面，本发明实施例还提供了一种电子设备，包括处理器和存储器，所述存储器耦接到所述处理器，所述存储器存储指令，当所述指令由所述处理器执行时使所述电子设备执行第一方面中任一项所述方法的步骤。In a fourth aspect, an embodiment of the present invention further provides an electronic device, including a processor and a memory, the memory is coupled to the processor, the memory stores instructions, and when the instructions are executed by the processor The electronic device is caused to perform the steps of the method of any one of the first aspects.

第五方面，本发明实施例还提供了一种计算机可读存储介质，其上存储有计算机程序，该程序被处理器执行时实现第一方面中任一项所述方法的步骤。In a fifth aspect, an embodiment of the present invention further provides a computer-readable storage medium on which a computer program is stored, and when the program is executed by a processor, implements the steps of any one of the methods in the first aspect.

本发明的一种增程器、增程器的控制方法和装置与现有技术相比，具有以下优点：Compared with the prior art, the range extender, the control method and device for the range extender of the present invention have the following advantages:

本发明的控制方法通过获取车辆的电池剩余电量和牵引需求功率，在电池剩余电量无法完全满足牵引需求功率时，确定出增程器输出的增程功率，在增程功率大于设定的功率阈值时，说明需要增程器输出较大的增程功率满足牵引需求功率，控制增程器的发动机输出扭矩跟随增程功率对应变化。该方法减少了常规方式中通过提高发动机转速增大增程功率时，由于过高转速带来的噪音导致增程器对车辆声振粗糙度的不利影响，控制发动机输出扭矩跟随增程功率对应变化，可以保障增程功率达到输出要求的同时，降低增程器噪音对车辆声振粗糙度的影响。The control method of the present invention determines the range extender output by the range extender when the remaining battery power cannot fully meet the traction demand power by acquiring the remaining battery power and traction demand power of the vehicle, and when the range extender power is greater than the set power threshold When , it means that the range extender needs to output a large range extender power to meet the traction demand power, and the engine output torque of the range extender is controlled to follow the corresponding change of the range extender power. This method reduces the adverse effect of the range extender on the vehicle acoustic and vibration roughness caused by the noise caused by the excessively high speed when the range extender power is increased by increasing the engine speed in the conventional method, and the output torque of the engine is controlled to follow the corresponding change of the range extender power. , which can ensure that the range extender power meets the output requirements and at the same time reduce the impact of the range extender noise on the vehicle's acoustic and vibration roughness.

附图说明Description of drawings

为了更清楚地说明本说明书实施例或现有技术中的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本说明书的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。In order to more clearly illustrate the embodiments of the present specification or the technical solutions in the prior art, the accompanying drawings required in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some of the present specification. In the embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without any creative effort.

图1为本发明实施例提供的一种增程器的控制方法的流程图；1 is a flowchart of a method for controlling a range extender according to an embodiment of the present invention;

图2为本发明实施例提供的定转速功率跟随策略的增程功率云图；FIG. 2 is an extended-range power cloud diagram of a constant-speed power following strategy provided by an embodiment of the present invention;

图3为本发明实施例提供的增程器优化策略的增程功率云图；3 is a range extender power cloud diagram of a range extender optimization strategy provided by an embodiment of the present invention;

图4为本发明实施例提供的增程器控制策略逻辑图；4 is a logical diagram of a range extender control strategy provided by an embodiment of the present invention;

图5为本发明实施例提供的一种增程器的控制装置的结构示意图。FIG. 5 is a schematic structural diagram of a control device for a range extender according to an embodiment of the present invention.

具体实施方式Detailed ways

下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整的描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例，基于本发明实施例，本领域普通技术人员所获得的所有其他实施例，都属于本发明实施例保护的范围。The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. The embodiments of the present invention and all other embodiments obtained by persons of ordinary skill in the art fall within the protection scope of the embodiments of the present invention.

目前对于增程器的控制策略，主要包括多点工况的定点策略和功率跟随策略。在定点策略下，是基于整车常用工况的功率需求，选取增程器多个不同功率匹配点，以控制増程器输出增程功率。通过定点工况输出增程功率，在超出整车功率需求时，多余电量提供给电池充电，发电量不足时，电池发电弥补。该种控制策略由于转速点切换频率低，存在高频率的充放电，某个容量存储点可能进行反复充放电，尤其是整车高速工况，由于需求功率大，长时间处于高功率定点发电，对电池寿命损害大。功率跟随策略是基于不同增程功率下的最佳效率点，增程器的匹配点跟随车辆功率需求变化，基于整车功率需求，选择对应的匹配点，增程器发电量与车辆功率需求相近，电池不存在频繁的充放电现象；同时增程器经济性是最佳水平，但功率跟随模式下的声振粗糙度水平差，相同功率下的增程器转速高，用户难以接受。相对传统车，混动车型重量增加，尤其PHEV车型，通常会出现“小马拉大车”现象。在亏电状态下，现有两种模式下增程器均存在转速较高的问题，造成对声振粗糙度影响较大。下面将具体阐述如何通过本发明实施例的控制方法解决上述问题。At present, the control strategy for the range extender mainly includes fixed-point strategy and power follow strategy for multi-point operating conditions. Under the fixed-point strategy, a number of different power matching points of the range extender are selected based on the power requirements of the common working conditions of the vehicle to control the output range extender power of the range extender. The extended-range power is output through fixed-point operating conditions. When the power requirement of the whole vehicle is exceeded, the excess power is supplied to the battery to charge, and when the power generation is insufficient, the battery generates power to make up. Due to the low switching frequency of the speed point, this control strategy has high-frequency charging and discharging, and a certain capacity storage point may be repeatedly charged and discharged, especially in the high-speed condition of the vehicle, due to the large power demand, it is in high-power fixed-point power generation for a long time. Great damage to battery life. The power following strategy is based on the best efficiency point under different range extender power. The matching point of the range extender follows the change of the vehicle power demand. Based on the power demand of the whole vehicle, the corresponding matching point is selected. The power generation of the range extender is similar to the power demand of the vehicle. , the battery does not have frequent charging and discharging; meanwhile, the economy of the range extender is the best level, but the level of acoustic and vibration roughness in the power follow mode is poor, and the range extender rotates at a high speed under the same power, which is difficult for users to accept. Compared with traditional cars, the weight of hybrid models increases, especially PHEV models, and the phenomenon of "small horse-drawn carts" usually occurs. In the state of power loss, the range extender in the existing two modes has the problem of high rotational speed, which has a great impact on the acoustic and vibration roughness. The following will specifically describe how to solve the above problems through the control method of the embodiment of the present invention.

请参阅图1，图1为本发明实施例提供了一种增程器的控制方法的流程图，包括：Please refer to FIG. 1. FIG. 1 provides a flowchart of a method for controlling a range extender according to an embodiment of the present invention, including:

S11、获取车辆的电池剩余电量和牵引需求功率。S11. Obtain the remaining battery power and traction demand power of the vehicle.

具体的，电池剩余电量为车辆动力电池中能够驱动车辆驾驶的电量，可以通过电池的SOC(State of Charge，剩余电量)表征；当然，也可以通过采集车辆动力电池的电压表征。牵引需求功率为牵引车辆移动所需要的功率，可以通过车辆行驶的速度和加速度计算得出。获取电池剩余电量和牵引需求功率后进入步骤S12。Specifically, the remaining power of the battery is the power in the vehicle power battery that can drive the vehicle, which can be characterized by the SOC (State of Charge, remaining power) of the battery; of course, it can also be characterized by collecting the voltage of the vehicle power battery. The traction demand power is the power required to move the traction vehicle, which can be calculated from the speed and acceleration of the vehicle. Step S12 is entered after the remaining battery power and traction demand power are obtained.

S12、根据所述电池剩余电量和所述牵引需求功率，确定增程器输出的增程功率。S12. Determine the range extender output by the range extender according to the remaining battery power and the traction demand power.

具体的，车辆动力电池在电池剩余电量不足以提供牵引需求功率时，说明电池剩余电量较低，需要启动增程器弥补不足的需求功率，因此增程功率为牵引需求功率与电池剩余电量对应功率的差值。确定增程器输出的增程功率后进入步骤S13。Specifically, when the remaining battery power of the vehicle power battery is not enough to provide the traction demand power, it means that the remaining battery power is low, and the range extender needs to be activated to make up for the insufficient demand power. Therefore, the range extender power is the power corresponding to the traction demand power and the remaining battery power. difference value. Step S13 is entered after determining the range extender output by the range extender.

S13、在所述增程功率大于设定的功率阈值时，控制所述增程器的发动机输出扭矩跟随所述增程功率对应变化。S13. When the range extender power is greater than a set power threshold, control the engine output torque of the range extender to change correspondingly with the range extender power.

具体的，增程功率大于设定的功率阈值时，说明需要增程器输出的增程功率较大，若采用常规提高增程器中发动机转速的方法，可能对车辆的声振粗糙度产生不利影响，因此控制增程器的发动机输出扭矩跟随增程功率对应变化。可以理解，增程功率为发动机转速和输出扭矩的乘积，增程功率输出的需求增大时，控制发动机的输出扭矩对应增大；反之，增程功率输出的需求减小时，控制发动机的输出扭矩对应减小。在保障能够符合增程功率输出要求的前提下，尽量减小发动机转速，以降低增程器对车辆声振粗糙度的影响。本领域技术人员可以理解，功率阈值可以通过技术人员的经验设定，也可以通过标定实验确定，能够符合车辆声振粗糙度的要求即可。Specifically, when the range extender power is greater than the set power threshold, it means that the range extender needs to output a large range extender power. If the conventional method of increasing the engine speed in the range extender is used, it may be detrimental to the acoustic and vibration roughness of the vehicle. Therefore, the engine output torque that controls the range extender changes correspondingly with the range extender power. It can be understood that the extended-range power is the product of the engine speed and the output torque. When the demand for extended-range power output increases, the output torque of the control engine increases accordingly; on the contrary, when the demand for extended-range power output decreases, the output torque of the control engine is controlled. correspondingly reduced. On the premise of ensuring that the power output of the extended range can be met, the engine speed should be reduced as much as possible to reduce the impact of the range extender on the vehicle's acoustic and vibration roughness. Those skilled in the art can understand that the power threshold can be set by the experience of the technical personnel, or can be determined by a calibration experiment, as long as it can meet the requirements of the acoustic and vibration roughness of the vehicle.

在一种具体的实施方式中，控制增程器的发动机输出扭矩跟随增程功率对应变化，包括：In a specific embodiment, the output torque of the engine that controls the range extender changes correspondingly with the range extender power, including:

在电池剩余电量小于第一电量阈值时，根据增程功率与预设的第一对应关系，确定发动机的设定扭矩，其中，第一对应关系为发动机在相同转速下输出扭矩与增程功率的线性变化关系；根据设定扭矩，控制增程器输出增程功率。When the remaining battery power is less than the first power threshold, the set torque of the engine is determined according to the extended range power and a preset first corresponding relationship, wherein the first corresponding relationship is the difference between the output torque of the engine and the extended range power at the same rotational speed. Linear change relationship; according to the set torque, the range extender is controlled to output the range extension power.

具体的，电池剩余电量小于第一电量阈值，说明车辆动力电池可能不能满足牵引需求功率所需要的功率，需要启动增程器，和动力电池共同提供满足牵引需求功率的输出功率。由于增程功率为发动机转速和输出扭矩的乘积，在转速不变时，输出扭矩增大时增程功率对应线性增大，因此可以根据增程功率与预设的第一对应关系确定发动机的设定扭矩，根据设定扭矩控制增程器输出增程功率，即可在转速不变时输出满足要求的增程功率。Specifically, the remaining battery power is less than the first power threshold, indicating that the vehicle power battery may not be able to meet the power required by the traction demand power, and the range extender needs to be activated to provide the output power to meet the traction demand power together with the power battery. Since the extended range power is the product of the engine speed and the output torque, when the rotation speed is constant, the extended range power increases linearly when the output torque increases. Therefore, the engine setting can be determined according to the extended range power and the preset first corresponding relationship. Constant torque, according to the set torque to control the range extender to output the range extender power, the range extender power that meets the requirements can be output when the speed remains unchanged.

需要说明的是，由于在一固定转速下，持续增大输出扭矩对应的增程功率具有上限，因此发动机转速可以根据增程功率的增大对应增大，请参阅图2，图中横坐标表征的是发动机转速，纵坐标表征的是输出扭矩，图中曲线分别对应增程器额定功率的百分比，具体包括10％-70％。在该云图中灰度由深至浅表征的是发动机的燃油经济性，灰度越浅燃油经济性越好；反之，灰度越深燃油经济性越差，因此需要尽可能使发动机的输出扭矩和转速对应在浅色区域工作。可以根据需要将转速定义为多个固定转速，根据增程功率在对应固定转速增大输出扭矩，以满足需要输出增程功率。It should be noted that, since the range-extending power corresponding to the continuous increase of the output torque has an upper limit at a fixed rotational speed, the engine speed can be correspondingly increased according to the increase of the range-extending power, please refer to Figure 2, the abscissa in the figure represents is the engine speed, the ordinate represents the output torque, and the curves in the figure correspond to the percentage of the rated power of the range extender, specifically including 10%-70%. In this cloud image, the grayscale from dark to light represents the fuel economy of the engine. The lighter the grayscale, the better the fuel economy. On the contrary, the darker the grayscale, the worse the fuel economy. Therefore, it is necessary to make the output torque of the engine as much as possible. And the RPM corresponds to work in the light-colored area. The rotational speed can be defined as multiple fixed rotational speeds as required, and the output torque can be increased at the corresponding fixed rotational speed according to the extended range power to meet the required output extended range power.

在具体实施时，若电池剩余电量过低，车辆动力电池可能因严重亏电造成损坏。During specific implementation, if the remaining battery power is too low, the vehicle power battery may be damaged due to serious power shortage.

为解决上述问题，在一种具体的实施方式中，根据设定扭矩，控制增程器输出增程功率之后，还包括：In order to solve the above problem, in a specific embodiment, after controlling the range extender to output the range extender power according to the set torque, the method further includes:

在电池剩余电量小于第二电量阈值时，根据发动机的最大扭矩控制增程器输出最大功率，其中，第二电量阈值小于第一电量阈值；根据最大功率和增程功率的差值确定出剩余功率，并将剩余功率输出至车辆的动力电池。When the remaining battery power is less than the second power threshold, the range extender is controlled to output the maximum power according to the maximum torque of the engine, wherein the second power threshold is less than the first power threshold; the remaining power is determined according to the difference between the maximum power and the range extender power , and output the remaining power to the vehicle's power battery.

具体的，电池剩余电量小于第二电量阈值，说明车辆动力电池已处于严重亏电状态，为减小对电池寿命的影响，根据发动机的最大扭矩控制增程器输出最大功率，根据最大功率和增程功率的差值确定出剩余功率，剩余功率为增程器在满足车辆的牵引需求功率后多余的功率，将剩余功率输出至车辆的动力电池，可以对动力电池进行充电，减小动力电池严重亏电对电池寿命的影响。Specifically, if the remaining power of the battery is less than the second power threshold, it means that the vehicle power battery is in a state of serious power loss. In order to reduce the impact on the battery life, the range extender is controlled to output the maximum power according to the maximum torque of the engine. The residual power is determined by the difference of the range power. The residual power is the excess power of the range extender after meeting the traction demand power of the vehicle, and the residual power is output to the power battery of the vehicle, which can be charged for the power battery and reduce the seriousness of the power battery. The impact of power loss on battery life.

在具体实施时，仅通过增大输出扭矩提高增程功率，对牵引需求功率进行匹配时，可能造成增程器中发动机的燃油消耗较大，车辆行驶成本上升。In specific implementation, only by increasing the output torque to increase the range extender power and matching the traction demand power, the fuel consumption of the engine in the range extender may be large, and the vehicle running cost may increase.

为解决上述问题，在一种具体的实施方式中，根据电池剩余电量和牵引需求功率，确定增程器输出的增程功率之后，还包括：In order to solve the above problem, in a specific embodiment, after determining the range extender output by the range extender according to the remaining battery power and the traction demand power, the method further includes:

获取增程功率与发动机控制参数的第二对应关系；在增程功率不大于设定的功率阈值时，根据增程功率和第二对应关系，确定发动机的目标控制参数，其中，目标控制参数为发动机输出增程功率时最小燃油量的控制参数；根据目标控制参数，控制增程器输出增程功率。Obtain the second correspondence between the extended range power and the engine control parameter; when the extended range power is not greater than the set power threshold, determine the target control parameter of the engine according to the extended range power and the second corresponding relationship, where the target control parameter is The control parameter of the minimum fuel quantity when the engine outputs the range extension power; according to the target control parameter, the range extender is controlled to output the range extension power.

具体的，与燃油量相关的发动机控制参数包括发动机转速、进气温度、进气量和输出扭矩等，达到相同的增程功率，可以通过不同的控制参数进行配置，不同的控制参数对应不同的燃油量。在增程功率不大于设定的功率阈值时，说明，增程器需要输出的增程功率较小，需要考虑发动机的燃油经济性，根据增程功率和第二对应关系确定发动机的目标控制参数，以减小燃油消耗量，根据目标控制参数控制增程器输出增程功率，使增程器在输出满足牵引需求功率的增程功率的同时，保证较优的燃油经济性。Specifically, the engine control parameters related to the fuel quantity include engine speed, intake air temperature, intake air volume and output torque, etc. To achieve the same extended range power, it can be configured through different control parameters, and different control parameters correspond to different fuel quantity. When the range extender power is not greater than the set power threshold, it means that the range extender needs to output a small range extender power, and the fuel economy of the engine needs to be considered, and the target control parameters of the engine are determined according to the range extender power and the second corresponding relationship , in order to reduce the fuel consumption, and control the range extender to output the range extender power according to the target control parameters, so that the range extender can ensure better fuel economy while outputting the range extender power that meets the traction demand power.

在一种具体的实施方式中，根据目标控制参数，控制增程器输出增程功率之后，还包括：In a specific embodiment, after controlling the range extender to output the range extender power according to the target control parameter, it further includes:

在增程功率变化时，更新目标控制参数；根据更新后的目标控制参数，控制增程器输出变化的增程功率。When the range extender power changes, the target control parameter is updated; according to the updated target control parameter, the range extender is controlled to output the changed range extension power.

具体的，根据目标控制参数控制增程器输出增程功率是一种定点的控制策略，增程功率变化时目标控制参数对应更新，以使增程器输出满足要求的增程功率。Specifically, controlling the range extender to output the range extender power according to the target control parameter is a fixed-point control strategy. When the range extender power changes, the target control parameters are correspondingly updated, so that the range extender outputs the required range extender power.

在一种具体的实施方式中，根据目标控制参数，控制增程器输出增程功率，包括：In a specific implementation, controlling the range extender to output range extender power according to the target control parameter, including:

根据目标控制参数，确定发动机的目标转速和目标扭矩；根据目标转速和目标扭矩，控制增程器输出增程功率。According to the target control parameters, the target speed and target torque of the engine are determined; according to the target speed and target torque, the range extender is controlled to output the range extension power.

具体的，请参阅图3，图中表征各参数的方式与图2相同，在增程功率不大于设定的功率阈值时，若增程功率变化，为使增程器输出增程功率，需要将目标控制参数对应更新，例如当前的目标控制参数在控制点1，在增程功率增大变化时，将目标控制参数由控制点1调整至控制点2对应的转速和扭矩，以输出满足要求的增程功率，在控制点对应的转速较低，对车辆的声振粗糙度影响较小，可以在满足增程功率和声振粗糙度时具有较好的燃油经济性，从图中可以看出可以将功率阈值设定为增程器额定功率的50％。Specifically, please refer to Fig. 3. The way of representing each parameter in the figure is the same as that of Fig. 2. When the range extender power is not greater than the set power threshold, if the range extender power changes, in order for the range extender to output the range extension power, it needs to be Update the target control parameters accordingly. For example, the current target control parameters are at control point 1. When the range-extending power increases and changes, adjust the target control parameters from control point 1 to the speed and torque corresponding to control point 2, so that the output meets the requirements. The range extension power is lower at the control point, and the impact on the acoustic and vibration roughness of the vehicle is small. It can have better fuel economy when the range extension power and acoustic and vibration roughness are satisfied. It can be seen from the figure It is possible to set the power threshold to 50% of the rated power of the range extender.

下面本发明实施例结合图4具体阐述在整车控制时，如何以SOC作为参考，实施本发明提出的控制方法。The following embodiment of the present invention specifically describes how to implement the control method proposed by the present invention by taking the SOC as a reference during vehicle control in conjunction with FIG. 4 .

步骤一：首先识别驾驶员整车驾驶模式，基于整车电池电量SOC，判断增程器是否开启。Step 1: First, identify the driving mode of the driver's vehicle, and determine whether the range extender is turned on based on the SOC of the vehicle's battery.

步骤二：基于SOC判断增程器匹配工况点，当SOC≤某电量A时，说明动力电池不能提供足够的牵引需求功率，启动增程器，并进入定点1工况，即图3中的控制点1，该工况下发动机转速较低，对车辆的声振粗糙度影响较小。Step 2: Judging the matching operating point of the range extender based on the SOC. When the SOC is less than or equal to a certain amount of power A, it means that the power battery cannot provide enough traction demand power, start the range extender, and enter the fixed point 1 operating condition, that is, the Control point 1, the engine speed is low under this working condition, and the impact on the vehicle's acoustic and vibration roughness is small.

步骤三：当SOC≤A-b时，由定点1进入定点2工况，即图3中的控制点2，该工况下发动机转速为中转速，增程器处于燃油经济性的最佳点。Step 3: When SOC≤A-b, the fixed point 1 enters the fixed point 2 working condition, that is, the control point 2 in Figure 3. Under this working condition, the engine speed is at the medium speed, and the range extender is at the optimum point of fuel economy.

步骤四：当SOC≤A-b-c时，增程器输出的增程功率进一步增大，由定点模式进入定转速功率跟随，在一固定转速下增大发动机的输出扭矩，发动机处于中高转速，声振粗糙度较好。Step 4: When SOC≤A-b-c, the output of the range extender is further increased, and the fixed-point mode enters the fixed-speed power follower, and the output torque of the engine is increased at a fixed speed. The engine is at medium and high speed, and the sound and vibration are rough. Degree is better.

步骤五：当SOC≤A-b-c-d时，说明车辆的动力电池亏电较为严重，增程器输出的增程功率将达到最大，增程器定转速功率跟随，进入最大功率点，并将剩余功率输出至动力电池存储。Step 5: When SOC≤A-b-c-d, it means that the power battery of the vehicle is seriously depleted, the range extender output power will reach the maximum, the range extender will follow the constant speed power, enter the maximum power point, and output the remaining power to Power battery storage.

步骤六：当SOC电量逐渐增加，基于电量，判断进入定点/定转速功率跟随模式。Step 6: When the SOC power gradually increases, based on the power, it is determined to enter the fixed-point/constant-speed power follow mode.

步骤七：如电量SOC≥A+e，增程器关闭，进入EV模式(或称纯电驱动模式)。其中，A、b、c、d、e数值＞0，其具体数值可以通过技术人员的经验确定，或标定试验确定，在此不再赘述。Step 7: If the power SOC≥A+e, the range extender is turned off and enters EV mode (or pure electric drive mode). Wherein, the values of A, b, c, d, and e are greater than 0, and the specific values can be determined by the experience of the technicians, or by calibration experiments, which will not be repeated here.

基于与控制方法同样的发明构思，本发明实施例还提供了一种增程器，所述增程器经控制方法中任一所述的方法进行控制。Based on the same inventive concept as the control method, an embodiment of the present invention further provides a range extender, and the range extender is controlled by any one of the control methods.

基于与控制方法同样的发明构思，本发明实施例还提供了一种增程器的控制装置，请参阅图5，包括：Based on the same inventive concept as the control method, an embodiment of the present invention also provides a control device for a range extender, please refer to FIG. 5 , including:

第一获取模块501，用于获取车辆的电池剩余电量和牵引需求功率；The first obtaining module 501 is used to obtain the remaining battery power and traction demand power of the vehicle;

第一确定模块502，用于根据所述电池剩余电量和所述牵引需求功率，确定增程器输出的增程功率；a first determining module 502, configured to determine the range extender output by the range extender according to the remaining battery power and the traction demand power;

第一控制模块503，用于在所述增程功率大于设定的功率阈值时，控制所述增程器的发动机输出扭矩跟随所述增程功率对应变化。The first control module 503 is configured to control the engine output torque of the range extender to follow the corresponding change of the range extender when the range extender power is greater than a set power threshold.

在一种可选的实施例中，所述第一控制模块，包括：In an optional embodiment, the first control module includes:

第一确定子模块，用于在所述电池剩余电量小于第一电量阈值时，根据所述增程功率与预设的第一对应关系，确定所述发动机的设定扭矩，其中，所述第一对应关系为所述发动机在相同转速下所述输出扭矩与所述增程功率的线性变化关系；a first determination sub-module, configured to determine the set torque of the engine according to the extended range power and a preset first corresponding relationship when the remaining power of the battery is less than a first power threshold, wherein the first A corresponding relationship is a linear change relationship between the output torque and the range-extending power of the engine at the same rotational speed;

第一控制子模块，用于根据所述设定扭矩，控制所述增程器输出所述增程功率。The first control sub-module is configured to control the range extender to output the range extension power according to the set torque.

在一种可选的实施例中，所述第一控制模块，还包括：In an optional embodiment, the first control module further includes:

第二控制子模块，用于在所述电池剩余电量小于第二电量阈值时，根据所述发动机的最大扭矩控制所述增程器输出最大功率，其中，所述第二电量阈值小于所述第一电量阈值；The second control sub-module is configured to control the range extender to output the maximum power according to the maximum torque of the engine when the remaining power of the battery is less than a second power threshold, wherein the second power threshold is less than the first power threshold a power threshold;

输出子模块，用于根据所述最大功率和所述增程功率的差值确定出剩余功率，并将所述剩余功率输出至车辆的动力电池。The output sub-module is configured to determine the residual power according to the difference between the maximum power and the extended range power, and output the residual power to the power battery of the vehicle.

在一种可选的实施例中，所述装置还包括：In an optional embodiment, the apparatus further includes:

第二获取模块，用于获取所述增程功率与发动机控制参数的第二对应关系；a second obtaining module, configured to obtain a second correspondence between the range-extending power and engine control parameters;

第二确定模块，用于在所述增程功率不大于设定的功率阈值时，根据所述增程功率和所述第二对应关系，确定发动机的目标控制参数，其中，所述目标控制参数为所述发动机输出所述增程功率时最小燃油量的控制参数；A second determination module, configured to determine a target control parameter of the engine according to the extended range power and the second corresponding relationship when the extended range power is not greater than a set power threshold, wherein the target control parameter a control parameter for the minimum fuel quantity when the engine outputs the extended range power;

第二控制模块，用于根据所述目标控制参数，控制所述增程器输出所述增程功率。The second control module is configured to control the range extender to output the range extension power according to the target control parameter.

在一种可选的实施例中，所述装置还包括：In an optional embodiment, the apparatus further includes:

更新模块，用于在所述增程功率变化时，更新所述目标控制参数；an update module, configured to update the target control parameter when the range-extending power changes;

第三控制模块，用于根据更新后的所述目标控制参数，控制所述增程器输出变化的所述增程功率。A third control module, configured to control the range extender to output the changed range extender power according to the updated target control parameter.

在一种可选的实施例中，所述第三控制模块，包括：In an optional embodiment, the third control module includes:

第二确定子模块，用于根据所述目标控制参数，确定所述发动机的目标转速和目标扭矩；a second determination submodule, configured to determine the target rotational speed and target torque of the engine according to the target control parameter;

第三控制子模块，用于根据所述目标转速和所述目标扭矩，控制所述增程器输出所述增程功率。A third control sub-module, configured to control the range extender to output the range extension power according to the target rotational speed and the target torque.

基于与控制方法同样的发明构思，本发明实施例还提供了一种电子设备，包括处理器和存储器，所述存储器耦接到所述处理器，所述存储器存储指令，当所述指令由所述处理器执行时使所述电子设备执行控制方法中任一项所述方法的步骤。Based on the same inventive concept as the control method, an embodiment of the present invention further provides an electronic device, including a processor and a memory, the memory is coupled to the processor, and the memory stores instructions, when the instructions are When the processor executes, the electronic device executes the steps of any one of the control methods.

基于与控制方法同样的发明构思，本发明实施例还提供了一种计算机可读存储介质，其上存储有计算机程序，该程序被处理器执行时实现看控制方法中任一项所述方法的步骤。Based on the same inventive concept as the control method, an embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, implements any one of the methods in the control method. step.

本发明实施例中提供的技术方案，至少具有如下技术效果或优点：The technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:

1.通过获取车辆的电池剩余电量和牵引需求功率，在电池剩余电量无法完全满足牵引需求功率时，确定出增程器输出的增程功率，在增程功率大于设定的功率阈值时，说明需要增程器输出较大的增程功率满足牵引需求功率，控制增程器的发动机输出扭矩跟随增程功率对应变化。该方法减少了常规方式中通过提高发动机转速增大增程功率时，由于过高转速带来的噪音导致增程器对车辆声振粗糙度的不利影响，控制发动机输出扭矩跟随增程功率对应变化，可以保障增程功率达到输出要求的同时，降低增程器噪音对车辆声振粗糙度的影响。1. By obtaining the remaining battery power and traction demand power of the vehicle, when the remaining battery power cannot fully meet the traction demand power, determine the range extender output power of the range extender. When the range extender power is greater than the set power threshold, explain The range extender needs to output a large range extender power to meet the traction demand power, and the engine output torque of the range extender is controlled to follow the corresponding change of the range extender power. This method reduces the adverse effect of the range extender on the vehicle acoustic and vibration roughness caused by the noise caused by the excessively high speed when the range extender power is increased by increasing the engine speed in the conventional method, and the output torque of the engine is controlled to follow the corresponding change of the range extender power. , which can ensure that the range extender power meets the output requirements, and at the same time reduce the impact of the range extender noise on the vehicle's acoustic and vibration roughness.

2.本发明的控制方法，基于定点和定转速功率跟随优势，兼顾整车的燃油经济性，使车辆在高速行驶时，仍然具有较好的NVH性能。2. The control method of the present invention is based on the advantages of fixed-point and fixed-speed power following, and takes into account the fuel economy of the entire vehicle, so that the vehicle still has good NVH performance when driving at high speed.

本领域内的技术人员应明白，本发明的实施例可提供为方法、系统、或计算机程序产品。因此，本发明可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本发明可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

本发明是参照根据本发明实施例的方法、装置(模块、系统)、和计算机程序产品的流程图和/或方框图来描述。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式计算机或者其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (modules, systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block in the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to the processor of a general purpose computer, special purpose computer, embedded computer or other programmable data processing device to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing device produce Means implementing the functions specified in one or more of the flowcharts and/or one or more blocks of the block diagrams.

这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory result in an article of manufacture comprising instruction means, the instructions The apparatus implements the functions specified in the flow or flow of the flowcharts and/or the block or blocks of the block diagrams.

这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。These computer program instructions can also be loaded on a computer or other programmable data processing device to cause a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process such that The instructions provide steps for implementing the functions specified in the flow or blocks of the flowcharts and/or the block or blocks of the block diagrams.

尽管已描述了本发明的优选实施例，但本领域内的技术人员一旦得知了基本创造概念，则可对这些实施例作出另外的变更和修改。所以，所附权利要求意欲解释为包括优选实施例以及落入本发明范围的所有变更和修改。Although preferred embodiments of the present invention have been described, additional changes and modifications to these embodiments may occur to those skilled in the art once the basic inventive concepts are known. Therefore, the appended claims are intended to be construed to include the preferred embodiment and all changes and modifications that fall within the scope of the present invention.

显然，本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范围。这样，倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内，则本发明也意图包括这些改动和变型在内。It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention. Thus, provided that these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (10)

1. A control method of a range extender is characterized by comprising the following steps:

acquiring the residual battery capacity and the traction required power of the vehicle;

determining the range-extending power output by the range-extending device according to the residual battery capacity and the traction required power;

and when the range-extending power is larger than a set power threshold value, controlling the output torque of the engine of the range-extending device to correspondingly change along with the range-extending power.

2. The method of controlling a range extender of claim 1, wherein said controlling an engine output torque of the range extender to vary correspondingly with the range power comprises:

when the residual battery capacity is smaller than a first capacity threshold, determining a set torque of the engine according to the range-extended power and a preset first corresponding relation, wherein the first corresponding relation is a linear change relation of the output torque and the range-extended power of the engine at the same rotating speed;

and controlling the range extender to output the range-extending power according to the set torque.

3. The method of controlling the range extender of claim 2, further comprising, after controlling the range extender to output the range-extending power according to the set torque:

when the residual battery capacity is smaller than a second capacity threshold value, controlling the range extender to output the maximum power according to the maximum torque of the engine, wherein the second capacity threshold value is smaller than the first capacity threshold value;

and determining residual power according to the difference value between the maximum power and the range-extending power, and outputting the residual power to a power battery of the vehicle.

4. The method for controlling the range extender of claim 1, wherein after determining the range extender output range power according to the battery residual capacity and the traction demand power, the method further comprises:

acquiring a second corresponding relation between the range-extending power and an engine control parameter;

when the range-extending power is not larger than a set power threshold value, determining a target control parameter of the engine according to the range-extending power and the second corresponding relation, wherein the target control parameter is a control parameter of the minimum fuel quantity when the engine outputs the range-extending power;

and controlling the range extender to output the range-extending power according to the target control parameter.

5. The method for controlling the range extender of claim 4, wherein after controlling the range extender to output the range-extending power according to the target control parameter, the method further comprises:

updating the target control parameter when the range-extended power changes;

and controlling the range extender to output the variable range extending power according to the updated target control parameter.

6. The method of controlling the range extender of claim 4, wherein the controlling the range extender to output the range-extended power according to the target control parameter comprises:

determining a target rotating speed and a target torque of the engine according to the target control parameters;

and controlling the range extender to output the range-extending power according to the target rotating speed and the target torque.

7. A range extender, wherein said range extender is controlled by a method according to any one of claims 1 to 6.

8. A control device for a range extender, comprising:

the first acquisition module is used for acquiring the residual battery capacity and the traction required power of the vehicle;

the first determining module is used for determining the range-extending power output by the range-extending device according to the residual battery capacity and the traction required power;

the first control module is used for controlling the output torque of the engine of the range extender to correspondingly change along with the range extending power when the range extending power is larger than a set power threshold.

9. An electronic device comprising a processor and a memory coupled to the processor, the memory storing instructions that, when executed by the processor, cause the electronic device to perform the steps of the method of any of claims 1-6.

10. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 6.

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