Vehicle posture adjustment method for vehicles equipped with oil-pneumatic springs with locking function

Abstract

The invention discloses a vehicle posture adjusting method for a vehicle provided with hydro-pneumatic springs with a locking function. The method is used for accurately adjusting the vehicle posture of the vehicle provided with the springs, and it is guaranteed that the loads of all the springs are reasonably distributed. The method includes the two main processes of open-loop vehicle posture adjustment and closed-loop vehicle posture adjustment. The procedure includes the following steps that firstly, unlocking is conducted through the springs for oil drainage; secondly, locking is conducted through the springs for feeding oil to the largest stroke allowed by a piston rod; thirdly, unlocking is conducted through the springs; fourthly, oil is fed or drained to the target vehicle height through the springs in the locking state; fifthly, unlocking is conducted when the springs reach the assigned vehicle height; and sixthly, the fourth step and the fifth step are repeated. The open-loop vehicle posture adjustment process includes the first step to the third step, and the closed-loop vehicle height adjustment process includes the fourth step to the sixth step. By the adoption of the method, it is guaranteed that the loads of the springs are reasonably distributed after the vehicle posture adjustment is finished, and the requirement for the distance between the vehicle and the ground is met.

Description

Technical field [0001] The invention belongs to the field of vehicle attitude adjustment of vehicles equipped with oil-gas springs with locking structures, and relates to a vehicle attitude adjustment method for vehicles equipped with oil-gas springs with locking functions. Background technique [0002] Oil-air springs can improve the ride comfort of vehicles and have a wide range of applications. The oil-gas spring will cause the chassis of the vehicle to rise due to its own temperature rise during the driving of the vehicle. Excessive vehicle posture will affect the driving safety of the vehicle, and the vehicle posture needs to be re-adjusted; the oil-gas spring needs to travel on multiple roads When used on a vehicle, it is also necessary to adjust the height of the vehicle according to the road surface to achieve the best balance of passability and comfort. [0003] Under the premise that the spring charge is constant, the adjustment of the spring length is achieved by adjust...

AI Technical Summary

Problems solved by technology

The advantage of this adjustment method is that the spring load distribution is reasonable after the vehicle is adjusted. The disadvantage is that the vehicle height is determined by the amount of spring inflation, and only one vehicle height can be realized; when the vehicle load changes, the vehicle height may It will be uneven, that is, the extension of the spring piston rod is different

The advantage of this oil filling method is that it can achieve high-precision vehicle height adjustment, but it also has its disadvantages: due to the difference in the center of gravity of the vehicle under different loads of the vehicle, the resistance of the spring filling and discharging pipelines is different, even if the four springs are filled with oil at the same time , The action of the spring also has a sequence, which will cause the oil filling of the spring to not match the normal distribution of the vehicle load, some springs are too hard, and some are too soft

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