Hydro-pneumatic suspension system and wheeled vehicle with same

Abstract

The invention discloses a hydro-pneumatic suspension system and a wheeled vehicle with the same. The hydro-pneumatic suspension system comprises a left suspension oil cylinder, a right suspension oil cylinder, a left change valve, a right change valve, a first hydraulic locking structure and a second hydraulic locking structure. The left suspension oil cylinder and the right suspension oil cylinder are respectively provided with a rod cavity and a rodless cavity. The left change valve and the right change valve are three-position four-way valves and are respectively provided with a first oil opening and a second oil opening, a pressure oil opening connected with a pressure oil source and an oil return opening connected with an oil tank. The first hydraulic locking structure is connected between the left suspension oil cylinder and the left change valve. The second hydraulic locking structure is connected between the right suspension oil cylinder and the right change valve. The left change valve and the right change valve are respectively provided with a first state, a second state and a third state, wherein the first state enables the first working oil opening and the second working oil opening to be connected to the oil return opening; the second state enables the first working oil opening to be connected to the oil return opening and the second working oil opening to be connected to the pressure oil opening; the third state enables the first working oil opening to be connected to the pressure oil opening and the second working oil opening to be connected to the oil return opening. In the invention, the hydro-pneumatic suspension system and the wheeled vehicle can realize the active lifting of vehicle axles under the nonload bearing state.

Description

technical field [0001] The invention relates to an oil-air suspension system of a wheeled vehicle, and to a wheeled vehicle with the oil-air suspension system. The invention is especially suitable for multi-axle wheeled vehicles in which at least one pair of suspension oil cylinders work together. Background technique [0002] Oil-air suspension is a suspension device that integrates elastic elements and shock absorbers. It overcomes the linear characteristics of leaf springs and is applied to engineering vehicles. It has good vibration reduction performance, ride comfort and vehicle driving stability, and can achieve vehicle height Adjustability. Among the existing oil-air suspension technical solutions for wheeled vehicles, there are independent oil-air suspension and connected oil-air suspension, both of which have their own advantages and disadvantages. For example, independent oil-air suspension is generally used on dump trucks, and connected oil-air suspension is gen...

AI Technical Summary

Problems solved by technology

This existing oil-pneumatic suspension control circuit must passively retract the suspension oil cylinder through the weight of the vehicle, and the active lifting of the axle cannot be realized in the non-load-bearing state

In addition, this oil-pneumatic suspension technology has fewer road driving modes and cannot meet the requirements of various complex road traffic conditions.

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