Demand-based active anti-rollover hydraulic inline suspension system for heavy truck

Abstract

The invention relates to a demand-based active anti-rollover hydraulic inline suspension system for a heavy truck. The system comprises an intermediate and rear axle anti-rollover hydraulic system and a demand-based active control device, wherein the intermediate and rear axle anti-rollover hydraulic system comprises a plurality of intermediate and rear axle oil cylinders supported between an intermediate and rear axle of an axle and a frame; the plurality of intermediate and rear axle oil cylinders are symmetrically arranged on left and right sides of the frame; the upper cavities of all the intermediate and rear axle oil cylinders on the left side are communicated with the lower cavities of all the intermediate and rear axle oil cylinders on the right side to form a first hydraulic oil circuit; the upper cavities of all the intermediate and rear axle oil cylinders on the right side are communicated with the lower cavities of all the intermediate and rear axle oil cylinders on the left side to form a second hydraulic oil circuit; the demand-based active control device consists of a hydraulic pump, a switching component, a detection component and a controller; and the controller ensures that a pump oil port of the hydraulic pump is communicated with one of the first hydraulic oil circuit and the second hydraulic oil circuit or is not communicated with any of the first hydraulic oil circuit and the second hydraulic oil circuit through the switching component according to a side-tipping signal detected by the detection component. The system has a simple structure, is high in reliability and applicability and low in operating cost, can effectively improve the safety of the truck, and can switch an anti-rollover function in active and passive modes.

Description

technical field [0001] The invention mainly relates to the technical field of vehicle safety, in particular to an anti-rollover suspension system related to vehicle chassis dynamics. Background technique [0002] With the development of highways, long-distance transport of goods by road has become more and more common, and various heavy-duty trucks have become the main undertakers of this business. For a heavy-duty truck running at high speed, if the speed is too high when turning, and the turning radius is too small, the truck may roll over. In addition, the excessive inclination angle of the road surface will also cause the vehicle to roll over. Vehicle rollover has become an important road traffic safety problem. In terms of its degree of harm, it is the second largest traffic accident after vehicle frontal collision. Therefore, preventing rollover of heavy trucks has become an important research content of vehicle active safety. [0003] In traditional vehicle passive ...

AI Technical Summary

Problems solved by technology

[0007] 1. By increasing the suspension stiffness and installing the anti-rollover method of the stabilizer bar, the ride comfort of the vehicle may be reduced, and the requirements for both rollover prevention and ride comfort improvement cannot be met at the same time;

[0008] 2. The independent hydraulic cylinder actuator active anti-rollover control system has disadvantages such as complex structure, low reliability, and large energy consumption, and the application cost in actual engineering is relatively high;

[0009] 3. Active steering or braking anti-rollover control system has the disadvantages of complex structure and difficult reliability, because the control system actively adjusts the size and direction of the steering angle, or performs unbalanced braking on the wheels, it is easy to cause the driver Loss of sense of direction, which is not conducive to the driver's control of the vehicle;

[0010] 4. When the heavy-duty truck has a large roll angle, the passive anti-rollover control system cannot provide enough balance force to adjust the frame attitude

In addition, if there is hydraulic oil leakage in the ordinary passive anti-rollover control system, the generated cavitation will not only cause noise, but also affect the anti-rollover performance;

[0011] 5. The distance between the front axle and the middle and rear axles of heavy-duty trucks is relatively long. If the hydraulic cylinders of the suspension of the front axle and the middle and rear axles are directly connected with hydraulic oil pipes to form an anti-rollover control system, there will be large losses along the way, Defects such as slow dynamic response affect the performance of the control system

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