The switching control loop between the hydro-pneumatic suspension and the active suspension

A control loop and active suspension technology, which is applied to suspensions, elastic suspensions, vehicle components, etc., can solve the problems of non-adjustable accumulator pressure and difficulty in ensuring reliability
CN109050192BActive Publication Date: 2021-05-14YANSHAN UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
YANSHAN UNIV
Publication Date
2021-05-14

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Abstract

A oil-air suspension and active suspension switching control circuit and a suspension oil cylinder, first of all: the structure of the suspension oil cylinder is improved, that is, the outer cylinder wall of the suspension oil cylinder is provided with oil ports at the upper and lower sides, and the inner cylinder is built in the center through hole of the upper end cover. , the wall of the inner cylinder is provided with two oil ports respectively connected to the inner rodless cavity and the inner rod cavity, the end of the inner cylinder located in the outer cylinder is connected to the outer piston located in the outer cylinder, and the inner One end of the cylinder rod located in the inner cylinder is connected with the inner piston, and one end located in the outer cylinder is fixedly connected with the lower end cover. The present invention adds an active suspension control circuit to the existing interconnected oil-air suspension switching control circuit, which is based on the improved suspension oil cylinder, and adopts left and right servo valves and left and right oil-gas recovery control valves to cooperate with it. Through the active suspension control loop, three control modes of oil-air control, active control and rigidity control of the suspension system can be realized, and the three control modes can be switched mutually without affecting each other.
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Description

technical field

[0001] The invention relates to a vehicle suspension system. Background technique

[0002] The suspension system is an important part of the vehicle chassis, which can not only support the frame, but also buffer the impact transmitted to the frame or body from uneven roads, and attenuate the vehicle vibration caused by the ground. The performance of the suspension system directly determines the ride comfort, handling stability and driving safety of the vehicle.

[0003] Current vehicles, especially engineering vehicles, mostly adopt leaf spring suspension, oil-pneumatic suspension or air suspension. The stiffness characteristic of the leaf spring suspension is linear, and once the stiffness value is determined, it cannot be changed. When the road surface conditions change, it cannot meet the requirements of high driving comfort and handling stability. Oil-pneumatic suspension and air suspension have variable stiffness characteristics, which can improve the ...

Claims

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