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Hydro-pneumatic suspension system, vehicle and control method of hydro-pneumatic suspension system

A technology of oil-pneumatic suspension and suspension cylinder, which is applied to interconnection systems, vehicle components, suspensions, etc., and can solve problems that affect vehicle driving performance and cannot be quickly adjusted in place

Pending Publication Date: 2020-06-19
XCMG CONSTR MACHINERY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the non-synchronous control design of the existing oil-air suspension system, it is often impossible to adjust the suspension attitude quickly, which seriously affects the driving performance of the vehicle

Method used

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  • Hydro-pneumatic suspension system, vehicle and control method of hydro-pneumatic suspension system

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0029] Such as figure 1 As shown, it is a kind of oil-pneumatic suspension system provided by the embodiment of the present invention, comprising:

[0030] Hydraulic pump: its P port and axle pressure oil circuit L P Connection, T port and axle return oil circuit L T connect;

[0031] At least two suspension cylinder groups: each suspension cylinder group is arranged corresponding to one axle of the vehicle, including a left suspension cylinder arranged on the left side of the corresponding axle and a right suspension cylinder arranged on the right side of the corresponding axle;

[0032] The left suspension oil cylinder and the right suspension oil cylinder are respectively equipped with re...

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Abstract

The invention discloses a hydro-pneumatic suspension system, a vehicle and a control method of the hydro-pneumatic suspension system. The hydro-pneumatic suspension system comprises a hydraulic pump and at least two suspension oil cylinder sets; the hydraulic pump is connected with an axle pressure oil path and an axle oil return path; each suspension oil cylinder set comprises a left suspension oil cylinder arranged on the left side of the corresponding axle and a right suspension oil cylinder arranged on the right side of the corresponding axle; the left suspension oil cylinders and the right suspension oil cylinders are each provided with a suspension control valve set; and each suspension control valve set comprises a switching control valve block and a switch valve block, wherein theswitching control valve block can connect a rod cavity of the corresponding suspension oil cylinder with the axle pressure oil way and the axle oil return way in a switching mode, and the switch valveblock can connect and disconnect a rodless cavity of the corresponding suspension oil cylinder with a rod cavity of another suspension oil cylinder in the same set. Independent control over the suspension oil cylinders, synchronous control over the coaxial suspension oil cylinders, synchronous control over the suspension oil cylinders on the same side and whole vehicle lifting adjustment can be rapidly achieved, and various driving state requirements can be met.

Description

technical field [0001] The invention relates to an oil-air suspension system, a vehicle and a control method for the oil-air suspension system, and belongs to the technical field of vehicle suspension. Background technique [0002] Oil and gas suspension has height adjustability, rigid support, anti-rolling and good shock absorption, and its stiffness and damping have nonlinear characteristics. Vehicles with oil-pneumatic suspension have driving comfort, strong stability, passability and off-road performance, and can run in harsh conditions such as deserts and swamps as well as rough and inclined roads, so they are widely used in special vehicles such as cranes, tanks and On the armored vehicle. At present, multi-axle vehicles using oil-pneumatic suspension systems need to adjust the suspension posture under different road conditions to improve the passing performance of the vehicle. Due to the non-synchronous control design of the existing oil-air suspension system, it is...

Claims

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Application Information

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IPC IPC(8): B60G11/27B60G17/015B60G17/04B60G21/067B60G21/073
CPCB60G11/27B60G17/015B60G17/04B60G17/0408B60G21/067B60G21/073
Inventor 牛连防鲁振张书杰
Owner XCMG CONSTR MACHINERY
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