A full hydraulic reverse braking and clutching system

Abstract

The invention provides a fully-hydraulic reverse braking clutch system, and belongs to the technical field of hydraulic pressure. The fully-hydraulic reverse braking clutch system solves the problem that the power cut-off time is difficult to control in the brake process of an existing braking system. The fully-hydraulic reverse braking clutch system comprises an oil pump, a braking valve, a brakeand a speed change gear; the braking valve communicates with the oil pump through a first oil inlet way, the braking valve communicates with the brake through a first working oil way, the braking valve controls the brake to conduct reverse braking, and a hydraulic-control reversing valve is arranged between the first oil inlet way and the brake; and a second oil inlet of the hydraulic-control reversing valve communicates with the first oil inlet way through a second oil inlet way, a second working oil opening communicates with a power cut-off control oil opening of the speed change gear through a second working oil way, the control oil opening communicates with the first working oil way, and when the pressure of the first working oil way is descended to the set value of the hydraulic-control reversing valve, the hydraulic-control reversing valve reverses to enable the second oil inlet way to communicate with the second working oil way. According to the fully-hydraulic reverse brakingclutch system, power can be cut off under the appropriate time in the brake process, and the driving comfort and safety of a vehicle are improved.

Description

technical field [0001] The invention belongs to the field of hydraulic technology, and relates to a full hydraulic brake clutch system, in particular to a full hydraulic reverse brake clutch system. Background technique [0002] The vehicle braking system refers to a device that forcibly reduces the speed of the vehicle. The braking system is mainly composed of an energy supply device, a control device, a transmission device and a brake. Its main function is to slow down or even stop a moving car, keep the speed of a downhill car stable, and keep a stopped car still. [0003] In the existing braking system, hydraulic pressure is a relatively common source of braking energy. Through the driver's operation of the control element, the pressure medium is transmitted to the transmission device and drives the brake to act to achieve braking. At present, the most common brake is the friction brake. The working principle is to use the frictional resistance generated when two moving...

AI Technical Summary

Problems solved by technology

[0006] The problem that exists regardless of forward or reverse braking is that during the braking process, the power of the vehicle is still output normally, causing the braking device to overcome the original inertia of the vehicle and convert the power of the vehicle to continue to accelerate, resulting in braking. The load of the moving device is too large to achieve an ideal braking effect, especially for engineering vehicles with large inertia and strong power.

[0008] However, during the running of the vehicle, due to the light braking during operation, the need to provide power immediately after the brake, or the need to use the engine to decelerate during the downhill process, only the Coordinated Control Strategy for Transmission and Braking Systems of Mining Vehicles "This batch of papers mentioned that cutting off the power output of the vehicle at the beginning of braking will lead to frequent transmission actions and reduce the practical life of the transmission, or the lack of power when the vehicle is in urgent need of power after braking will affect the normal operation of the driver. , even when the brake force is insufficient when going downhill, it will cause danger

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