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Electric vehicle acceleration pedal signal diagnostic method and device

An accelerator pedal and electric vehicle technology, which is applied in the direction of measuring devices, measuring electrical variables, measuring current/voltage, etc., to achieve the effect of reducing driving safety hazards and reducing misdiagnosis of accelerator pedal signals

Active Publication Date: 2016-06-22
SAIC MOTOR
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0005] The problem solved by the embodiments of the present invention is how to accurately diagnose the accelerator pedal signal of an electric vehicle to reduce driving safety hazards

Method used

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  • Electric vehicle acceleration pedal signal diagnostic method and device
  • Electric vehicle acceleration pedal signal diagnostic method and device
  • Electric vehicle acceleration pedal signal diagnostic method and device

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Embodiment Construction

[0032] The existing accelerator pedal signal diagnosis method only judges whether the detected accelerator pedal signal voltage is within the normal range, and if it is within the normal range, then it is determined that the accelerator pedal signal is normal. However, the existing accelerator pedal signal diagnosis methods may misdiagnose in some cases, which will cause hidden dangers to driving safety.

[0033] In the embodiment of the present invention, according to the obtained first accelerator pedal sensor signal voltage value and the proportionally converted second accelerator pedal sensor signal voltage value, when the two are in the same preset voltage range, the difference between the two is calculated and The absolute value is taken, and when the absolute value is greater than the maximum allowable error, it is determined that the accelerator pedal signal is faulty. That is, when diagnosing the accelerator pedal signal, the difference between the signal voltages of ...

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Abstract

A method and device for diagnosing an accelerator pedal signal of an electric vehicle, the method comprising: acquiring the voltage value of the accelerator pedal signal, and judging whether the voltage value of the first accelerator pedal sensor signal and the proportionally converted second accelerator pedal sensor signal voltage value are in the same range. the same preset voltage interval; when the first accelerator pedal sensor signal voltage value and the proportionally converted second accelerator pedal sensor voltage value are in the same preset voltage interval, the absolute value of the difference between the two is obtained and compared with the The maximum allowable error value corresponding to the preset voltage range is compared; when the absolute value is greater than the maximum allowable error value corresponding to the preset voltage range, it is determined that the accelerator pedal signal is faulty. By adopting the method and the device, the accelerator pedal signal of the electric vehicle can be accurately diagnosed, and the hidden dangers of driving safety can be reduced.

Description

technical field [0001] The invention relates to the field of electric vehicles, in particular to a method and device for diagnosing an accelerator pedal signal of an electric vehicle. Background technique [0002] In electric vehicles, the accelerator pedal is one of the main components for the driver to control the vehicle, and the accelerator pedal signal reflects the driver's demand for vehicle power. The vehicle controller obtains the driver's power demand through the accelerator pedal signal, converts the power demand into a torque demand command and sends it to the motor control unit (MCU), and the MCU executes the torque command to achieve vehicle acceleration. [0003] It can be seen that whether the accelerator pedal signal is normal or not has a crucial impact on the dynamics and safety of the vehicle. For example, when the vehicle needs to be braked, if the accelerator pedal fails and the vehicle accelerates, serious traffic accidents may result. [0004] The ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/10
Inventor 张剑锋张鹏黄海文陈婷
Owner SAIC MOTOR
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