Fault detecting and diagnosing method for electric driving system of vehicle

A technology of electric drive system and fault detection, which is applied in the direction of vehicle testing, measuring devices, testing of machine/structural components, etc., can solve the problems that cannot meet the requirements of high safety and reliability of electric vehicles, and achieve guaranteed data Authenticity, improved security, and reduced data volatility

Inactive Publication Date: 2011-09-07
CHERY AUTOMOBILE CO LTD
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  • Abstract
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AI Technical Summary

Problems solved by technology

Traditional fault detection and diagnosis methods are relatively simple and cannot meet the high safety and reliability requirements of electric vehicles

Method used

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  • Fault detecting and diagnosing method for electric driving system of vehicle
  • Fault detecting and diagnosing method for electric driving system of vehicle
  • Fault detecting and diagnosing method for electric driving system of vehicle

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Embodiment Construction

[0022] The specific embodiments of the present invention will be described in detail below in conjunction with the drawings.

[0023] The fault detection and diagnosis method of the vehicle electric drive system mainly includes two stages: the first stage is to process the data collected by the sensor; the second stage is the fault diagnosis to ensure that no false or false faults are reported, and the stable operation of the system is ensured.

[0024] In the first stage, the data collected by the sensor is processed as figure 1 Shown. The steps are:

[0025] The electric drive system collects the data to be tested and sends it to the filter module for processing;

[0026] Use the filter coefficient f to weight the current acquisition value X(n) and the last filter module output value Y(n-1), and the total weight is 1;

[0027] The current collected value X(n) and the last filter module output value Y(n-1) are respectively multiplied by their respective weights and then added together...

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Abstract

The invention discloses a fault detecting and diagnosing method for an electric driving system of a vehicle, which comprises the following steps: 1) performing the low-pass filtering treatment on the data acquired by a sensor, and 2) setting a counting limiting value for each fault counter, comparing the data after being filtered with a diagnosis value, and confirming if the fault really occurs. By using the method provided by the invention, the real value of fault detection data and the fault diagnosis are scientifically processed, the data fluctuation caused by the system interference is reduced, the data authenticity is ensured, the frequency of fault alarming and recovering is reasonably reduced, the misinformation and omission are avoided, the system runs reliably and stably, and the safety and reliability of the electric automobile can be increased.

Description

Technical field [0001] The invention belongs to the field of automobile power systems, and particularly relates to fault detection and diagnosis of an electric drive system of a pure electric automobile. Background technique [0002] At present, the environment and energy have become an issue of increasing concern. In the automotive field, pure electric vehicles with high efficiency, energy saving and environmental protection have subsequently become one of the development trends of the automotive industry. The electric drive system can achieve the purpose of low energy consumption and zero emission, which has great market prospects. [0003] Since electric vehicles rely on electric energy as the driving source, the protection of the drivers and the electric drive system, as well as the stable operation of the system, are particularly important. Highly reliable fault detection and diagnosis are important guarantees to ensure the safe and reliable operation of the vehicle. Traditi...

Claims

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Application Information

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IPC IPC(8): G01M17/007
Inventor 王金磊罗晓刘爱华黄彬
Owner CHERY AUTOMOBILE CO LTD
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