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Electric air compressor control strategy and fault diagnosis method

An electric air compressor and fault diagnosis technology, which is applied in the direction of pump control, machine/engine, pump/compressor layout, etc., can solve the problems of no diagnosis and treatment measures, poor adaptability, and low reliability, etc., and achieve improvement Operational efficiency, reduce failure rate, and avoid frequent start and stop effects

Active Publication Date: 2017-09-01
XIAMEN KING LONG UNITED AUTOMOTIVE IND CO LTD
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AI Technical Summary

Problems solved by technology

[0006] The above two control methods can achieve the purpose of automatic start and stop of the electric air compressor, but they do not involve the diagnosis and treatment measures in the case of control signal failure, and there are problems of low reliability and poor adaptability

Method used

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  • Electric air compressor control strategy and fault diagnosis method
  • Electric air compressor control strategy and fault diagnosis method

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Embodiment Construction

[0033] The specific implementation of the present invention will be further described below with reference to the description of the accompanying drawings. In the specific implementation, two gas tank air pressure sensors are taken as an example, and three or more air pressure sensors can be referred to for implementation.

[0034] A control strategy and fault diagnosis method for an electric air compressor, comprising the following specific steps:

[0035] Step (1): Judging and processing the validity of the input signal: the input signal includes: the front air tank air pressure sensor signal, the rear air tank air pressure sensor signal and the unloading signal, the unloading signal is the unloading pressure switch sensor signal Any one of the switching signal or the unloading current signal judged by collecting the working current of the electric air compressor. The air pressure sensor signal of the front and rear air storage tanks is collected by the instrument or other eq...

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Abstract

The invention discloses an electric air compressor control strategy and fault diagnosis method. The method comprises following specific steps: firstly, effectiveness of input signals is subject to judgment and treatment; secondly, an electric air compressor is operated and controlled; thirdly, according to signals in the control flow in the second step, the electric air compressor is subject to fault diagnosis; according to the method, the control strategy of the electric air compressor is provided, the specific method for the fault diagnosis in the control strategy is provided, under the condition that the input signals are normal, frequent starting and stopping of the air compressor can be effectively avoided, the service life of the air compressor is prolonged, it is ensured that water in an air storage barrel can be drained in time, and water accumulating is avoided; meanwhile, under the condition that the input signals are abnormal, the whole vehicle pressure value can be maintained to be above the brake safety pressure value all the time, brake safety is ensured, the fault can be effectively judged in time, the fault rate of a vehicle is reduced, and the vehicle operation efficiency is improved.

Description

technical field [0001] The invention relates to the field of control and maintenance of electric air compressors for vehicles, more specifically, a control strategy and fault diagnosis method for electric air compressors. Background technique [0002] At present, compressed air is generally used to provide power to pneumatic systems such as brakes, air suspensions, door pumps, and clutch cylinders in buses over 6 meters in length. Electric buses will be specially equipped with electric air compressors to provide compressed air sources for the entire vehicle to meet The working requirements of the compressed air equipment of the whole vehicle, thus replacing the function of conventional passenger cars to use the engine to pump air. The vehicle controller sends an enable signal to the frequency converter of the air compressor through the CAN bus, and the frequency converter can control whether the air compressor is working or not. [0003] At present, the start-up strategies ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B49/06B60T17/02B60T17/22
CPCB60T17/02B60T17/22F04B49/06
Inventor 林靖陈伟杨福清徐一凡黄玲林海巧唐静
Owner XIAMEN KING LONG UNITED AUTOMOTIVE IND CO LTD
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