Automobile air suspension electronic control system and control method thereof

Abstract

The invention discloses an automobile air suspension electronic control system, belonging to the technical field of automobile electronic control. The automobile air suspension electronic control system comprises a signal acquisition unit, an upper-layer control module, a bottom-layer control module and an execution mechanism, wherein mutual exchange and transfer of information flow and energy flow are implemented by a control circuit. The invention also discloses a control method of the system. The upper-layer control module can optimize the rigidity and damping of the suspension in real time according to the automobile working conditions and output the rigidity and damping to the bottom-layer control module as a reference input signal; and the bottom-layer control module calls a robust control program and generates a control instruction to adjust the execution mechanism of an air spring and a shock absorber according to the deviation between the reference rigidity and damping and the current rigidity and damping of the suspension. The system disclosed by the invention is designed by improving existing control system, the parts of original control system are continuously used as much as possible, thus the operation speed of the whole electronic control system is increased while the cost is increased slightly, and the automobile performance is perfectly improved.

Description

technical field [0001] The invention belongs to the technical field of automobile electronic control, and in particular relates to an automobile air suspension electronic control system and a control method thereof. Background technique [0002] Compared with passive suspension, Electronically Controlled Air Suspension (ECAS) can reduce the suspension parameters when the car is driving on a good road to improve ride comfort, or can increase the suspension parameters when driving on uneven roads Therefore, the handling stability is improved, and the small vertical acceleration of the axle can reduce road surface damage and improve the grip performance; and compared with the active suspension, it has the advantages of simple structure, low energy consumption and easy implementation. In developed countries such as Europe, America and Japan, ECAS has been widely used in high-end passenger cars, heavy trucks, medium trucks, trailers, special vehicles (instrument vehicles with hig...

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Problems solved by technology

[0003] Although ECAS has achieved the original design purpose, there are still many problems to be solved, and its performance and functions need to be further improved. Especially in my country's automobile industry, there is still a long way to go for the research and application of ECAS, among which One of the problems is that the ECAS suspension stiffness and damping will change due to regulation when the ECAS car is running on the road; in addition, the vehicle load condition, tire stiffness and driving environment will also change, etc.

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