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Throttle correction method for power assembly test rack

A powertrain and test bench technology, which is applied in the program control and electrical program control of the sequence/logic controller, can solve the problems of large error with the target control value and the inability to obtain control accuracy, so as to overcome nonlinearity Effects of error, load reduction, and simple method

Inactive Publication Date: 2018-12-07
GIF RES CENT CHINA
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  • Application Information

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Problems solved by technology

In actual use, on the one hand, because the output signal of the accelerator pedal is not linearly related to the accelerator opening, and on the other hand, during the movement of the linear actuator, the telescopic length of the linear actuator is not proportional to the accelerator opening. The ECU feedback throttle opening is 0, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, corresponding to the command value actually issued by the RTU, these 11 sets of data are fitted with a linear or polynomial curve, according to When the fitting formula is used for actual control, the error between the actual feedback value of the throttle opening and the target control value is relatively large, and high control accuracy cannot be obtained

Method used

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  • Throttle correction method for power assembly test rack

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Embodiment Construction

[0035] Such as figure 1 As shown, the powertrain test bench includes an accelerator pedal control actuator 1, an accelerator pedal controller 2 (TPC), an accelerator pedal 3, an ECU 4 and a real-time controller 5 (RTU). Data naming: The instruction sent by RTU to TPC through the can message is named txThrottleSetValue, and the throttle opening signal received by RTU from ECU4 is named rxThrottleRealValue.

[0036] Accelerator correction method for powertrain test bench: as follows:

[0037] 1. The TPC records the position of the accelerator pedal 3 when it is released, and it is defined as 0 in the RTU software;

[0038] 2. The TPC records the position where the accelerator pedal 3 is pressed to the bottom, and it is defined as 100 in the RTU software;

[0039] 3. The RTU software sends 0-100 commands to the TPC through the can message at a rate of 1 / s, and the TPC controls the actuator to step on the accelerator pedal 3 at a rate of 1 / s;

[0040] 4. The RTU software sends ...

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Abstract

The invention discloses a throttle correction method for a power assembly test rack. According to the method, a table look-up method instead of a curve fitting method is employed to perform throttle correction to obtain higher control precision. The method has the advantages that: (1) the method is simple, no complicated algorithm is needed, and the load of an RTU is reduced, (2) nonlinear errorsof a throttle pedal and machines are overcome and the control precision is high, and (3) values are separately taken in releasing and pressing the throttle pedal and the disadvantage of poor repeatability of the throttle pedal is overcome.

Description

technical field [0001] The invention relates to the technical field of powertrain test benches, in particular to an accelerator correction method. Background technique [0002] On the powertrain test bench, the engine power output is adjusted according to the opening of the accelerator pedal. During the long-term automatic test, the opening of the accelerator pedal needs to be adjusted accordingly according to the established control program. At present, a linear actuator is used in the bench test to control the opening of the accelerator pedal. In actual use, on the one hand, because the output signal of the accelerator pedal is not linearly related to the accelerator opening, and on the other hand, during the movement of the linear actuator, the telescopic length of the linear actuator is not proportional to the accelerator opening. The ECU feedback throttle opening is 0, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, corresponding to the command value actually issued by the R...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/04
CPCG05B19/04
Inventor 姜春杰许涛范雄伟殷霞红潘杨李亮
Owner GIF RES CENT CHINA
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