CN111198103B

Movatterモバイル変換

Info

Publication number: CN111198103B
Application number: CN201811386381.6A
Authority: CN
Inventors: 王志伟; 黄付强
Original assignee: United Automotive Electronic Systems Co Ltd
Current assignee: United Automotive Electronic Systems Co Ltd
Priority date: 2018-11-20
Filing date: 2018-11-20
Publication date: 2021-11-05
Anticipated expiration: 2038-11-20
Also published as: CN111198103A

Abstract

The invention provides a hub test system.A hub test vehicle sends a pedal signal of a previous hub test based on an OBD interface and only receives an accelerator pedal position signal from a CAN transceiver processor; the CAN transceiving processor receives a pedal signal of a previous hub rotation test, constructs and stores a one-dimensional change array related to parameters of an accelerator pedal based on the pedal signal, and sequentially sends elements in the one-dimensional change array at a preset period; each element of the one-dimensional change array is an ASCII code which is used for obtaining parameters of the accelerator pedal after sampling a pedal signal tested by the previous hub in a preset period, so that manual operation is digitalized, the whole process is matched with the previous driving operation, interference on test result analysis caused by human factors is reduced to the maximum extent, and data comparability is improved; meanwhile, software is convenient to use, the test result is analyzed in a toolized and contrasted manner, and the efficiency of optimizing the vehicle calibration parameters is improved.

Description

Rotating hub test system

Technical Field

The invention relates to the technical field of automobiles, in particular to a rotating hub testing system.

Background

In the development process of new vehicles designed and produced by automobile manufacturers, engine control parameters need to be repeatedly optimized so as to meet the national standards for various emission and oil consumption limits of light vehicles at different stages. Taking the currently applied gasoline engine emission regulatory standard of 5 th stage of China as an example, in the emission driving cycle (NEDC) cycle regulated by the state, the standards of definite limitation are applied to carbon monoxide, nitric oxide, hydrocarbon and non-methane hydrocarbon. It should be noted that, in the development stage of the project, the calibration of the hub test and the adjustment of the control parameters are generally performed, and the hub test and the adjustment of the control parameters are performed for several rounds of adjustment to reduce the emission and oil consumption of pollutants. The control parameters are adjusted each time according to the pollutant discharge amount under specific working conditions, but the specific working conditions are finished by a driver (the driver operates the vehicle, such as the stepping depth, speed and opportunity of an accelerator pedal), and the pollutant discharge amount can be influenced to a certain extent by the human factors, so that the working condition analysis difficulty is increased, and the efficiency of engine calibration data is reduced.

In addition, in comparison tests of part type selection and other purposes, even if the same vehicle is used, the same driver tests the same temperature point in the same laboratory (namely the external conditions are the same), the pollutant discharge amount is caused by human factors, the engine load and the like show larger difference in the test process, and the data contrast is reduced.

In view of the problems of the prior art in the hub test, the skilled person is always looking for a solution.

Disclosure of Invention

The invention aims to provide a rotating hub test system to solve the problems of rotating hub tests in the prior art.

In order to solve the above technical problem, the present invention provides a hub testing system, including:

the hub test vehicle sends a pedal signal of a previous hub test based on the OBD interface and only receives an accelerator pedal position signal from the CAN transceiver processor;

the CAN transceiving processor is used for receiving a pedal signal of the previous hub rotation test, constructing and storing a one-dimensional change array related to parameters of an accelerator pedal based on the pedal signal, and sequentially sending elements in the one-dimensional change array at a preset period; each element of the one-dimensional change array is an ASCII code which is obtained after sampling a pedal signal tested by a previous hub at a preset period to obtain an accelerator pedal parameter;

and the CAN communication tool is connected with the OBD interface and the CAN receiving and transmitting processor and used for establishing communication between the hub test vehicle and the CAN receiving and transmitting processor.

Optionally, in the hub testing system, the CAN transceiver processor samples the pedal signal of the previous hub test through ETK by using an INCA tool at a predetermined period.

Optionally, in the hub testing system, the CAN transceiver processor samples the pedal signal of the previous hub test with a predetermined period through CCP using an INCA tool.

Optionally, in the hub test system, the predetermined period ranges from 10ms to 20 ms.

Optionally, in the hub test system, the predetermined period is 10 ms.

Optionally, in the hub test system, the CAN communication tool is cannase.

Optionally, in the hub testing system, the CAN communication tool is ES 581.

Optionally, in the hub test system, the CAN transceiver processor obtains ASCII code of accelerator pedal parameters using MDA data analysis tool.

Optionally, in the hub test system, the CAN transceiver processor further records voltage change data of the accelerator pedal sensor by using a CANape tool.

Optionally, in the hub test system, the CAN transceiver processor is configured in a computer, and the CAN communication tool establishes communication with the computer based on a USB interface of the computer, so as to display data transmitted and received by the CAN transceiver processor.

In the hub test system provided by the invention, a hub test vehicle sends a pedal signal of a previous hub test based on an OBD interface and only receives an accelerator pedal position signal from a CAN transceiver processor; the CAN transceiving processor receives a pedal signal of a previous hub rotation test, constructs and stores a one-dimensional change array related to parameters of an accelerator pedal based on the pedal signal, and sequentially sends elements in the one-dimensional change array at a preset period; each element of the one-dimensional change array is an ASCII code which is used for obtaining parameters of the accelerator pedal after sampling a pedal signal tested by the previous hub in a preset period, so that manual operation is digitalized, the whole process is matched with the previous driving operation, interference on test result analysis caused by human factors is reduced to the maximum extent, and data comparability is improved; meanwhile, software is convenient to use, the test result is analyzed in a toolized and contrasted manner, and the efficiency of optimizing the vehicle calibration parameters is improved.

Drawings

FIG. 1 is a schematic view of a hub testing system according to an embodiment of the present invention.

Detailed Description

The hub testing system of the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. Advantages and features of the present invention will become apparent from the following description and from the claims. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.

Please refer to fig. 1, which is a schematic diagram of a hub testing system according to the present invention. As shown in fig. 1, the hub testing system includes: the system comprises an OBD (On-Board Diagnostic) interface, a CAN (controller area network) transceiving processor and a CAN communication tool, wherein the OBD interface is arranged On a hub test vehicle, and the hub test vehicle sends a pedal signal of a previous hub test based On the OBD interface and only receives an accelerator pedal position signal from the CAN transceiving processor; the CAN transceiving processor receives a pedal signal of a previous hub rotating test, constructs and stores a one-dimensional variation array related to parameters of an accelerator pedal based on the pedal signal, and sequentially sends elements in the one-dimensional variation array at a preset period; each element of the one-dimensional change array is an ASCII code which is obtained after sampling a pedal signal tested by a previous hub at a preset period to obtain an accelerator pedal parameter; the CAN communication tool is connected with the OBD interface and the CAN receiving and transmitting processor and used for establishing communication between the hub rotating test vehicle and the CAN receiving and transmitting processor.

In order to realize that the OBD interface only receives an accelerator pedal position signal from the CAN transceiving processor, a switch switching function is added when the OBD interface is configured, so that the OBD interface CAN change the accelerator pedal position signal from a pedal position sensor to the accelerator pedal position signal received from the CAN bus through special calibration data (such as changing a certain switch parameter) when a hub test is carried out.

Wherein, the OBD interface is a communication and diagnosis interface which is standard and matched with light road vehicles (such as conventional cars); the CAN communication tool is a hardware tool capable of realizing CAN communication, such as cannase of VECTOR company, ES581 of ETAS company, and the like; the CAN transceiving processor stores CAN transceiving codes which are used for executing functions of the CAN transceiving processor (namely receiving pedal signals of a previous hub test, constructing and storing a one-dimensional variation array related to parameters of an accelerator pedal based on the pedal signals, and sequentially transmitting elements in the one-dimensional variation array at a preset period) so as to control the CAN communication tool, wherein the preferable CAN transceiving codes are CANoe, BUSMASTER and the like.

Specifically, the CAN transceiver processor samples the pedal signal of the previous hub test by an ETK or CCP through an INCA tool in a preset period; the predetermined period range includes, but is not limited to, 10ms to 20ms, the predetermined period may be selected according to actual requirements, and preferably, the predetermined period is 10 ms.

Further, the CAN transceiver processor obtains the ASCII code of the accelerator pedal parameter by using an MDA data analysis tool, so that manual operation is digitalized, and interference on test result analysis caused by human factors is reduced to the maximum extent.

In addition, the CAN transceiver processor also records the voltage change data of the accelerator pedal sensor by using a CANape tool, and the basic idea and principle of control CAN refer to the process using an INCA tool.

In this embodiment, the CAN transceiver processor is configured in a computer, and the CAN communication tool establishes communication with the computer based on a USB interface of the computer, and is configured to display a data transceiving condition of the CAN transceiver processor.

The hub test system in this embodiment is suitable for an automatic transmission vehicle, and when the automatic transmission vehicle is ready to operate in the hub, the OBD interface only receives an accelerator pedal position signal (i.e. a calibration amount) from the CAN transceiver processor,

and the laboratory technician simultaneously triggers the hub test start and the CAN transceiving code of the CAN transceiving processor. Triggering the running CAN transceiver code begins sending the pedal signal (i.e., playing back the entire acceleration process of the previous hub test on the CAN bus). The driver only needs to control the speed and stop the vehicle by the brake pedal according to the part with the deceleration in the last time process.

In summary, in the hub test system provided by the present invention, the hub test vehicle sends the pedal signal of the previous hub test based on the OBD interface, and only receives the accelerator pedal position signal from the CAN transceiver processor; the CAN transceiving processor receives a pedal signal of a previous hub rotation test, constructs and stores a one-dimensional change array related to parameters of an accelerator pedal based on the pedal signal, and sequentially sends elements in the one-dimensional change array at a preset period; each element of the one-dimensional change array is an ASCII code which is used for obtaining parameters of the accelerator pedal after sampling a pedal signal tested by the previous hub in a preset period, so that manual operation is digitalized, the whole process is matched with the previous driving operation, interference on test result analysis caused by human factors is reduced to the maximum extent, and data comparability is improved; meanwhile, software is convenient to use, the test result is analyzed in a toolized and contrasted manner, and the efficiency of optimizing the vehicle calibration parameters is improved.

The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are within the scope of the appended claims.

Claims

1. A hub testing system, comprising:

2. The hub testing system of claim 1, wherein the CAN transceiver processor samples pedal signals from a previous hub test via ETK using an INCA tool at a predetermined period.

3. The hub testing system of claim 1, wherein the CAN transceiver processor samples pedal signals from a previous hub test with a CCP using an INCA tool at a predetermined period.

4. A hub testing system according to claim 2 or 3, wherein the predetermined period is in the range 10ms to 20 ms.

5. The hub testing system of claim 4, wherein the predetermined period is 10 ms.

6. The hub testing system of claim 1, wherein the CAN communication tool is a cannase.

7. The hub testing system of claim 1, wherein the CAN communication means is ES 581.

8. The hub testing system of claim 1, wherein the CAN transceiver processor obtains ASCII codes for accelerator pedal parameters using an MDA data analysis tool.

9. The hub testing system of claim 8, wherein the CAN transceiver processor further records voltage change data of an accelerator pedal sensor using a CANape tool.

10. The hub testing system of claim 1, wherein the CAN transceiver processor is configured in a computer, and the CAN communication tool establishes communication with the computer based on a USB interface of the computer for displaying data transmitted and received by the CAN transceiver processor.