A kind of electronic control system of automobile air suspension and its control method

Abstract

The invention discloses an electronic control system for automobile air suspension, belonging to the technical field of automobile electronic control, which includes a signal acquisition unit, an upper layer control module, a lower layer control module and an actuator, and the exchange of information flow and energy flow and The transfer is implemented by the control circuit. The invention also discloses the control method of the system. The upper control module can optimize the stiffness and damping of the suspension in real time according to the vehicle working condition signal, and send it to the bottom control module as its reference input signal. Referring to the deviation between the stiffness and damping and the current stiffness and damping, the robust control program is called to generate control instructions and to adjust the actuators of the air spring and shock absorber. The present invention improves the design on the basis of the existing control system, and inherits the parts of the original control system as much as possible, so that the calculation speed of the entire electronic control system is improved with a slight increase in cost, and the performance of the car is well 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 for short) 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 to improve ride comfort. Improve handling stability, and the small vertical acceleration of the axle can reduce road surface damage and improve grip performance; compared with active suspension, it has 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 high vibration is...

AI Technical Summary

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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