Double-control steering brake control device and system and vehicle

Abstract

The invention discloses a double-control steering brake control device and system and a vehicle, and the device comprises a duplex gear pump, a steering priority control valve, a steering proportional control valve group, a bidirectional balance valve, a steering oil cylinder, a load sensing steering gear, a shuttle valve, a prefill valve, a brake proportional control valve group and a brake valve, manual and automatic control over steering and braking of the vehicle is achieved, a steering pressure signal is transmitted to the steering priority control valve through the load sensing steering gear and the shuttle valve, and the steering pressure signal is transmitted to the steering priority control valve through the steering proportional control valve set and the shuttle valve. The steering priority control valve controls the flow of the hydraulic oil flowing through the steering priority control valve according to the steering pressure signal, so that the flow of the hydraulic oil is not influenced by steering load change, other redundant flow of hydraulic oil can return to a hydraulic oil tank through oil return channels of other working devices, and the energy-saving effect is improved.

Description

technical field [0001] The present application belongs to the technical field of vehicle control, and in particular, relates to a dual-control steering braking control device, a system, and a vehicle. Background technique [0002] Most of the existing agricultural and engineering vehicles use a single-circuit flow steady-state valve and a full hydraulic open-heart steering gear for steering, and the braking system mostly adopts a dual-circuit braking system, and the steering brakes share the same quantitative gear pump oil source. It shares the same quantitative gear pump oil source with the steering brake system of the engineering vehicle. When the brake system is filled with fluid, the steering system will be insufficiently supplied with oil at this moment, which will eventually lead to poor steering stability, and when the steering wheel is turned slowly, there will be abundant flow. The single-way flow steady state valve overflows back to the hydraulic oil tank, and the ...

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Problems solved by technology

[0002] Most of the existing agricultural and engineering vehicles use a single-way flow steady-state valve plus a full-hydraulic open-ended steering gear. The braking system mostly uses a double-circuit braking system, and the steering and braking share the same quantitative gear pump oil source. It shares the same quantitative gear pump oil source with the steering brake system of engineering vehicles. When the brake system is filled with fluid, there will be insufficient oil supply to the steering system at this moment, which will eventually result in poor steering stability. The overflow returns to the hydraulic oil tank through the single-way flow steady-state valve, and the energy-saving effect is poor

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