External electromagnetic valve type three-stage damping adjustable hydro-pneumatic suspension for electric control

Abstract

The invention relates to an oil gas suspension system for a means of transport, in particular to an external electromagnetic valve type three-stage damp adjustable oil gas suspension system for electric control, and belongs to the field of engineering element or part. The oil gas suspension system comprises a piston, a cylinder, an oil pipe, a damping valve, an energy accumulator, an electric control unit and a vehicle body acceleration sensor, wherein the piston divides the cylinder into two cavities which are not communicated; the upper cavity of the cylinder is provided with an oil discharge orifice which is connected with the external damping valve and the energy accumulator through the oil pipe; and the lower cavity is communicated with the atmosphere. When oil fluid passes through the external damping valve, damping force is adjusted through adjusting the total throttling area of the oil fluid in the damping valve or through controlling the valve opening pressure of an oil circuit in the damping valve. The vehicle body acceleration sensor is used for detecting acceleration signals of the vehicle body; and the electric control unit controls the on / off of the electromagnetic valve based on the detected acceleration signals of the vehicle body, thereby realizing adjustment of the damping force. The oil gas suspension system has the advantages of simple structure, easy realization, simple control and convenient repair.

Description

technical field [0001] The invention relates to an oil-pneumatic suspension system of a transportation tool, in particular to an external electromagnetic valve type three-stage damping adjustable oil-pneumatic suspension which can be used for electric control, and belongs to the field of engineering components or components. Background technique [0002] Hydro-pneumatic suspension, as an automobile suspension system with excellent performance, has a good application prospect in special vehicles and off-road vehicles. During the driving process of the vehicle, the oil-pneumatic suspension alleviates the impact of the ground and attenuates the vibration of the vehicle through the joint action of the accumulator and the oil shock absorber, so as to improve the ride comfort of the car, improve the safety of the car running, and enhance the ride of the car comfort. However, since the oil-pneumatic suspension is still a passive suspension, the throttling area of ​​the oil on the ...

AI Technical Summary

Problems solved by technology

However, since the oil-air suspension is still a passive suspension, the throttling area of ​​the oil on the internal damping valve is fixed, and the opening pressure of the unloading valve is also fixed. Once set, the adjustable damping force cannot be realized.

When the car is driving on a road condition beyond the adaptable range of the damping valve, it will lose the proper damping effect and cause the shock absorber to fail. low life

Therefore, shock absorbers with adjustable damping have appeared on some high-end vehicles, so that the damping force can be adjusted in a large range. Maintenance is inconvenient. At the same time, due to the built-in structure, the requirements for the matching accuracy of the components and the control accuracy of the actuator are relatively high, resulting in difficult processing

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