Fault diagnosis and control method of automobile vacuum pump

Abstract

The invention discloses a fault diagnosis and control method of an automobile vacuum pump system. The method comprises the steps: after a vehicle is started and a brake pedal is not stepped on, executing the starting fault detection step of a vacuum pump system, and respectively detecting the fault states of a low-voltage storage battery, a power assisting system controller, a vacuum pump and a vacuum degree sensor in the vacuum pump system; then storing fault codes and giving out fault warning. The method has the advantages that the diagnosis accuracy is high, the control is reasonable, and the control and diagnosis of the vacuum pump system can be more comprehensively and reliably realized.

Description

technical field [0001] The invention relates to the technical field of automobile vacuum systems, in particular to a fault diagnosis and control method of an automobile vacuum pump. Background technique [0002] At present, the research on the control and fault diagnosis of automotive vacuum pumps is more inclined to the development of hardware optimization, and the research in the field of strategy is not perfect. At present, the hardware technology is relatively mature, and the cost of continuing to optimize the hardware is relatively high for automotive research, and the expected effect is not very significant; the control and diagnosis strategies of traditional vacuum pumps are in the input link, intermediate control link (such as fault handling), and output link etc. are not perfect enough to ensure the normal operation of the vacuum pump safely, efficiently and quickly; traditional vacuum pumps consider the two processes of control and diagnosis together, resulting in ...

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Problems solved by technology

[0002] At present, the research on the control and fault diagnosis of automotive vacuum pumps is more inclined to the development of hardware optimization, and the research in the field of strategy is not perfect

At present, the hardware technology is relatively mature, and the cost of continuing to optimize the hardware is relatively high for automotive research, and the expected effect is not very significant; the control and diagnosis strategies of traditional vacuum pumps are in the input link, intermediate control link (such as fault handling), and output link etc. are not perfect enough to ensure the normal operation of the vacuum pump safely, efficiently and quickly; traditional vacuum pumps consider the two processes of control and diagnosis together, resulting in too cumbersome control process when the vacuum pump is running in the non-fault stage; the fault diagnosis range of traditional vacuum pumps is too large It is too small to meet the needs of fault diagnosis; the fault diagnosis of traditional vacuum pumps is too simple and cannot provide specific fault causes to maintenance personnel

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