Summary of the invention
In order to solve above mentioned problem, an object of the present invention is to propose a kind of measure of reclaiming the braking torque energy that may occur under the above-mentioned non-braking conditions of vehicle, thus increases vehicle energy degree of utilization.In addition, the present invention is also intended to the control method improving brake lamp, thus reduces front truck is improved brake lamp simultaneously reliability by the probability of car rear-end.
Other each feature or to combine with further feature thus those features being considered to belong to characteristic of the present invention will illustrate in detail in the claims.
According to an aspect of the present invention, provide a kind of regenerating control method for self-propelled vehicle, especially battery-driven car or hybrid electric vehicle, wherein said car is provided with motor on its axletree, the drive wheel be provided on axletree rotates, described car also comprises and to conduct electricity the rechargeable battery be connected with described motor, and described method comprises:
When detecting and judge that described car travels, whether acceleration pedal and brake pedal are pressed or discharge; And
When acceleration pedal and brake pedal are all in release position, described motor is switched to generator mode, to make consequent power storage in described rechargeable battery.
Present invention also offers a kind of regenerating control module for self-propelled vehicle, especially battery-driven car or hybrid electric vehicle, wherein said car is provided with motor on its axletree, the drive wheel be provided on axletree rotates, described car also comprises and to conduct electricity the rechargeable battery be connected with described motor, and described control module is arranged to:
When detecting and judge that described car travels, whether acceleration pedal and brake pedal are pressed or discharge; And
When acceleration pedal and brake pedal are all in release position, described motor is switched to generator mode, to make consequent power storage in described rechargeable battery.
Preferably, after described car decelerates to preset vehicle speed, cancel generator mode.
Preferably, when described car descent run being detected, described motor is switched to generator mode; Or, when described car starts after upward slope place parks, first described motor is switched to generator mode.
Preferably, the chaufeur of described car independently can cancel the generator mode of motor.
Preferably, described car also comprises brake lamp,
Under acceleration pedal and all d/d situation of brake pedal, determine whether light or extinguish described brake lamp according to the deceleration/decel of described car.
Preferably, if the deceleration/decel of described car is greater than first threshold, is such as greater than about 1.3m/s2, then described brake lamp is kept to light; Or
If the deceleration/decel of described car is less than Second Threshold, is such as less than about 0.7m/s2, then described brake lamp is kept to extinguish.
Preferably, described brake lamp is lighted via a relay by control or extinguishes.
According to another method of the present invention, also provide a kind of brake lamp control method for self-propelled vehicle, especially battery-driven car, under acceleration pedal and all d/d situation of brake pedal, determine whether light or extinguish described brake lamp according to the deceleration/decel of described car.
Present invention also offers a kind of brake lamp control module for self-propelled vehicle, especially battery-driven car, under described control module is arranged in acceleration pedal and all d/d situation of brake pedal, determine whether light or extinguish described brake lamp according to the deceleration/decel of described car.
Preferably, if the deceleration/decel of described car is greater than first threshold, is such as greater than about 1.3m/s2, then described brake lamp is kept to light; Or
If the deceleration/decel of described car is less than Second Threshold, is such as less than about 0.7m/s2, then described brake lamp is kept to extinguish.
Preferably, described brake lamp is lighted via a relay by control or extinguishes.
Understanding better with the explanation of favourable effect by the preferred embodiment by appended accompanying drawing of structure of the present invention and other object thereof.
Detailed description of the invention
In the drawings and in which, identical Reference numeral represents identical parts.
Within a context, below mention that electric vehicle is in explanation principle of the present invention.But, should be appreciated that the present invention is applicable to any other suitable vehicle, such as hybrid electric vehicle.
Battery-driven car comprises motor substantially, for controlling the electronic control unit (ECU) of motor, the body electronics stabilization system (ESP) and brake system etc. for controlling Vehicular turn, braking or skidding, wherein said brake system comprises friction braking system and regenerative brake system (RBS).Motor is installed on one or two axle of car, thus drives each drive wheel installed on axle to rotate.Such as, motor directly or indirectly can be coupled to drive wheel via change-speed box.Friction braking system is substantially the hydraulic/pneumatic brake system adopted in existing automobile, mainly comprises brake pedal, master brake cylinder, brake wheel cylinder and hydraulic circuit etc., for supplementing braking when realizing brake deficiency by motor merely.
When braking, vehicle driver is with pin by after the brake pedal of delaying unloading, and the sensor be arranged in car detects the signal of reaction brake request, and is transferred to ECU or ESP.ECU or ESP is after receiving brake request signal, the state of electrical generator is become to produce braking torque from the State Transferring of electrical motor in motor, and simultaneously RBS starts braking torque is recovered as electric energy, this electric energy stores and then for other object in the chargeable battery of car.
According to thought of the present invention, in order to put forward high-octane organic efficiency further, when non-brake (" the non-braking conditions " mentioned in present specification refers to the situation that the acceleration pedal of battery-driven car or hybrid electric vehicle and brake pedal all keep unclamping), motor is also converted into electrical generator and then braking torque is also produced by electrical generator.In order to realize the regeneration of this braking torque, regenerative drive-control system (RRCS) according to the present invention can be added to existing subsystem in battery-driven car, as ECU or ESP.
Fig. 1 diagrammatically illustrates according to schematic diagram of the present invention.Fig. 2 diagrammatically illustrates the efficiency chart corresponding with Fig. 1.As shown in these figures, when vehicle operating, sensor continuously detects different signals, the master brake cylinder pressure signal etc. of such as acceleration/brake pedal position or stroke signal, vehicle speed signal, car acceleration signal, car descending signal, change-speed box (motion/normal) mode signal, friction braking system.
As limiting examples as shown in Figure 1, the signal detected can be transferred to ECU process, to determine whether to occur braking conditions or non-braking conditions.
Such as, non-braking conditions can be determined according to acceleration/brake pedal position or the parameter such as stroke, the speed of a motor vehicle.Specifically, if detect that brake pedal is pressed, then this means braking conditions, now, as traditional battery-driven car, regenerative brake process can be realized by RBS.If all d/d words of acceleration pedal and brake pedal detected, then this means non-braking conditions.For non-braking conditions, ECU sends control signal to RRCS, thus the latter's command motor is converted to generator mode and meanwhile RBS converts braking torque to electric energy, and then described electric energy can store in chargeable battery.
That is, the electric regenerative control method of vehicle according to the invention, first, when detecting and judge that described car travels, whether acceleration pedal and brake pedal are pressed or discharge; Secondly, acceleration pedal and brake pedal while in d/d situation, motor is switched to generator mode, to make consequent power storage in rechargeable battery.
Should be appreciated that non-braking conditions is not limited to above mentioned situation.Non-braking conditions it is also conceivable to vehicle descending.Such as, during vehicle descending, chaufeur sometimes can release the gas pedal and brake pedal by vehicle art skating, if the gradient is larger, in order to avoid the speed of a motor vehicle is too fast, ECU sends control signal to RRCS and produces lock torque, and now RBS startup converts this braking torque to power storage.Again such as, when then vehicle starts after stopping in upward slope place, in order to prevent vehicle to saunter car, can convert motor to generator mode in advance by ECU, generation lock torque prevents car of sauntering.
In addition, non-braking conditions it is also conceivable to the pattern of transmission for vehicles.Such as, when the transmission modes of vehicle is in normal mode, the request of the ECU non-braking conditions of normal process in the manner described above.But when detecting that the transmission modes of vehicle is in mode of motion, chaufeur likely more radically steering vehicle.Now, ECU can be arranged to and stop sending to RRCS the time length that the control signal of non-braking conditions or shortening send control signal, thus speed can be kept faster under the more susceptible condition of vehicle.
In addition, non-braking conditions it is also conceivable to the speed of a motor vehicle.Such as, when chaufeur being detected simultaneously after release the gas pedal and brake pedal, ECU instruction RRCS produces lock torque, but when vehicle being detected lower than a certain pre-set velocity, instruction RRCS stopping generation lock torque.Do like this and reduction in the car speed short time can be avoided too fast, otherwise in order to resume speed increases energy consumption on the contrary.Particularly, battery-driven car is when speed per hour 120 kilometers/hour, and chaufeur is simultaneously after release the gas pedal and brake pedal, and ECU instruction RRCS produces lock torque and completes energy regenerating simultaneously, after detecting that the speed of a motor vehicle is lower than 80 kilometers/hour, ECU instruction RRCS stops producing lock torque.
In addition, non-braking conditions it is also conceivable to the change of vehicle driver's driving style.Such as, when vehicle is driven by different drivers, everyone driving style probably different (stroke of acceleration pedal pressing speed degree that is different, pressing is different etc.).After according to detection signal, ECU judges that change appears in driving style, ECU correspondingly can adjust the opportunity that instruction RRCS produces lock torque.Such as, when detecting that the driving style of driver is more radical, though detect non-braking conditions also as little as possible instruction RRCS produce lock torque.
Should be clear, above-mentioned RRCS can be made as one independently module be connected with the expansion interface of other subsystem such as RBS with ECU or ESP of battery-driven car respectively via data line.As an alternative, RRCS itself also can directly realize in the mode of Software Coding, joins respectively in the control software design of ECU or ESP and RBS.In a word, those skilled in the art can realize in any suitable manner after clear above-mentioned thinking of the present invention in battery-driven car.Such as, above-mentioned thinking according to the present invention can be expected arranging so a kind of regenerating control module at self-propelled vehicle, especially battery-driven car or hybrid electric vehicle, and when wherein this control module is arranged to detect and judges that described car travels, whether acceleration pedal and brake pedal are pressed or discharge; And when acceleration pedal and brake pedal are all in release position, described motor is switched to generator mode, with make thus generation power storage in described rechargeable battery.
According to the embodiments of the present invention, vehicle also can recuperated energy as required under non-braking conditions, significantly improves the energy utilization efficiency of vehicle.
Below go on to say brake lamp according to the present invention to control.
Fig. 3 diagrammatically illustrates the schematic diagram of the braking control system according to prior art.Can find out, only when chaufeur pressing brake pedal is mechanically to make stop lamp switch BLS close, brake lamp is just lighted.That is, the brake lamp of traditional braking control system is only just lighted for braking conditions.Therefore, even if the vehicle deceleration of front truck has reached very large value for non-braking conditions as above, brake lamp has been still extinguishing, this is because brake pedal is not pressed.In this case, because the chaufeur of rear car cannot be warned by the brake lamp of front truck, so probably there is traffic accident between front car and rear car.
Fig. 4 diagrammatically illustrates the schematic diagram according to braking control system of the present invention.Can find out, stop lamp switch BLS is as shown in Figure 3 replaced by relay, and this relay directly can be controlled by ESP or can control (BLC) module controls (see Fig. 1) by ESP by means of additional brake lamp.Such as, after ESP detects that brake pedal is stepped on, the operation of BLC module control relay under the instruction of ESP.Brake lamp is by this Control.Alternatively, when not pressing brake pedal, ESP also can light brake lamp via BLC module as required.Such as, chaufeur to brake pedal force by when being converted to generator mode during motor or by discharge simultaneously car retardation that braking torque that acceleration and brake pedal cause causes too fast time, brake lamp should be lit.
Such as in a preferred embodiment, can be arranged to for non-braking conditions according to BLC module of the present invention, if vehicle deceleration is detected be greater than first threshold, such as about 1.3m/s2, then think that now car retardation is too fast, ECU or ESP sends instruction to BLC module, is lighted by brake lamp via relay, now plays warning rear car too not near with car; If vehicle deceleration is detected be less than Second Threshold (it is less than first threshold), such as about 0.7m/s2, then think that vehicle now slows down rationally, thus ECU or ESP can not send the instruction of being lighted by brake lamp to BLC module; Be between first threshold and Second Threshold if vehicle deceleration is detected, then the parametric synthesis now considered according to other non-braking conditions above-mentioned further judges whether brake lamp to light.
Should be clear, the measure that this brake lamp of the present invention controls is not only applicable to battery-driven car or hybrid electric vehicle, and traditional vehicle being equipped with driving engine is equally applicable to BLC module of the present invention.
Similar with RRCS, BLC module also can be made as one independently module be connected with ECU or ESP of battery-driven car respectively via data line.As an alternative, BLC itself also can directly realize in the mode of Software Coding, joins in the control software design of ECU or ESP respectively.In a word, those skilled in the art can realize in any suitable manner after clear above-mentioned thinking of the present invention in vehicle.Such as, above-mentioned thinking according to the present invention can be expected arranging so a kind of brake lamp control module at self-propelled vehicle, especially battery-driven car or hybrid electric vehicle, under described control module is arranged in acceleration pedal and all d/d situation of brake pedal, determine whether light or extinguish described brake lamp according to the deceleration/decel of described car.
Should know that relay as shown in Figure 4 can without the need to the stop lamp switch in alternate figures 3, and be also only be arranged in parallel with it in the circuit of stop lamp switch in figure 3.Like this, above brake lamp under non-braking conditions can be realized control by this relay is same with BLC module, and without the need to doing larger change to vehicle itself.As an alternative, even can cancel relay, change brake lamp into LED, be controlled directly to its power supply by ESP chip.
Above mentioned process, module and system are only the objects for schematically illustrating.This specification sheets does not relate to the connection mode of specific implementation process, module and system.That is, those skilled in the art can know the mode of how implementation procedure, module and system under the prerequisite fully understanding thinking of the present invention.
Adopt technical scheme of the present invention, brake lamp not only can be lighted when braking, and according to circumstances needs also to light when other non-brake, greatly reduces front truck by the probability of car rear-end, improve automobile safety in utilization.In addition, the measure of the direct control LED brake lamp of the employing of relay or ESP it also avoid the possibility that brake light switch lost efficacy in frequent operation situation, further increases automobile safety in utilization.
Although show and describe the present invention by specific embodiment, the present invention is not limited to those particular cases explained.On the contrary, various different remodeling of the present invention can be carried out under the scope of claims of the present invention and substitute thereof.