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Fault diagnosing method of hybrid electric vehicle

A hybrid vehicle and fault diagnosis technology, which is applied to hybrid vehicles, motor vehicles, transportation and packaging, etc., can solve the problems that cannot meet the requirements of hybrid vehicles, and the fault diagnosis method of hybrid vehicles is not perfect, so as to improve reliability, The effect of improving accuracy

Inactive Publication Date: 2016-08-24
JILIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims to solve the problem that the existing hybrid electric vehicle fault diagnosis method is not perfect and cannot meet the requirements of hybrid electric vehicle for short-term fault and intermittent fault diagnosis of closed-loop system, and proposes a reasonable and perfect hybrid electric vehicle fault diagnosis method

Method used

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  • Fault diagnosing method of hybrid electric vehicle
  • Fault diagnosing method of hybrid electric vehicle
  • Fault diagnosing method of hybrid electric vehicle

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Embodiment

[0148] This embodiment is based on the fault diagnosis of the electronic accelerator signal of the hybrid electric vehicle, and verifies the effectiveness of the fault diagnosis method proposed by the present invention.

[0149] See Picture 9 , Picture 10 Compared with the original signal, the filtered signal has a slight change in the slope of the filtered signal at about 2s time, but its change and magnitude are basically the same; at the same time, the signal error caused by the noise interference of the original signal is filtered out. The three spikes whose signal value exceeds 100% between 4s and 6s are in the normal range after filtering.

[0150] Refer to Picture 11 , Picture 12 After 40s, the electronic throttle is stuck and the electronic throttle opening signal remains at a fixed value for a long time. At this time, after a period of fault detection, the HCU detects the fault state of the electronic throttle sticking, and outputs the fault state identifier Err01=1.

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Abstract

The invention discloses a fault diagnosing method of a hybrid electric vehicle and aims to solve the problem that an existing fault diagnosing method of the hybrid electric vehicle is imperfect and cannot satisfy the short-time fault and closed-loop system intermittent fault diagnosing requirements of the hybrid electric vehicle. The method includes the steps of firstly, detecting the faults of the hybrid electric vehicle, to be more specific, performing fault detection on a main part input signal of a hybrid power system, a power source torque response signal and a whole vehicle CAN communication signal to obtain identifiers representing the fault states of the to-be-detected signals; secondly, confirming the faults of the hybrid electric vehicle, to be more specific, confirming the faults of the hybrid powder system according the fault state identifiers obtained in the first step.

Description

Technical field [0001] The present invention relates to a method for diagnosing vehicle faults. More specifically, the present invention relates to a method for diagnosing hybrid electric vehicles. Background technique [0002] Hybrid Electric Vehicle (HEV), as one of the important ways to alleviate the current energy crisis and environmental pollution, has achieved considerable development in recent years. Different from traditional cars, hybrid electric vehicles are a complex electromechanical coupling system. The added power battery, battery management system, drive motor, motor controller and other electrical components in the system make the reliability of the hybrid system lower than that of traditional cars. There are also more potential failures in vehicles. [0003] On the one hand, the electromagnetic radiation and interference between components and devices in the hybrid power system, as well as the bandwidth constraints of the vehicle communication system and the in-ve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W20/50B60W50/02
CPCB60W20/50B60W50/0205
Inventor 曾小华李广含宋大凤彭宇君杨南南冯涛陈琴琴王广义张峻恺
Owner JILIN UNIV
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