Hydraulic control system for stepless brake retarder

Abstract

The invention relates to a hydraulic control system of a stepless brake speed reducer, which comprises an oil tank, an oil cylinder, an oil pump which is driven by a motor and an energy accumulator, and is characterized in that: the hydraulic control system of the stepless brake speed reducer further comprises a first reversing valve, a second reversing valve, a pressure reducing valve, a first one-way valve, a second one-way valve, a third one-way valve and a proportional valve; the oil pump is accessed to the energy accumulator through the first one-way valve, the energy accumulator is communicated with a relief cavity of the oil cylinder through the second one-way valve and the first reversing valve sequentially; one end of the second reversing valve is accessed to the oil tank, the other end is accessed to a brake cavity of the oil cylinder through the pressure reducing valve and the third one-way valve sequentially; the oil tank is accessed to the oil pump, the energy accumulator is accessed to the oil tank; the brake cavity of the oil cylinder is accessed to the oil tank through the first reversing valve; and the relief cavity of the oil cylinder is accessed to the oil tank through the proportional valve. The hydraulic control system of the stepless brake speed reducer realizes the stepless speed regulation, has rapid repeated brake response, strong adaptability and no impact on a vehicle and is conductive to prolonging the service life of the vehicle and the device.

Description

technical field [0001] The invention relates to a vehicle brake control system, in particular to a hydraulic control system of a stepless brake reducer. Background technique [0002] At present, the reducers used for the braking of hump automation in my country can be divided into two types according to the braking principle: one is the clamp type reducer, and the other is the non-clamp type reducer. [0003] The clamp-type reducer can implement different braking forces for vehicles with different loads through floating rails, but the disadvantage is that it cannot implement different braking forces for vehicles with the same load, that is, the braking force is single and cannot be adjusted, so the control accuracy is low. Unable to achieve balanced braking. [0004] The disadvantages of the controllable roof in the non-clamp type reducer are the large number, small braking force, low design speed, inability to realize "putting the head and blocking the tail", and low decod...

AI Technical Summary

Problems solved by technology

To sum up, it can be seen that: at present, the existing reducers in China, whether it is a clamp type reducer or a non-clamp type reducer, except for the TJDY graded brake reducer that can achieve three-level braking force, the rest of the reducers The braking force cannot be adjusted, on the one hand, the control accuracy is low, on the other hand, it restricts the development of hump speed regulation technology, that is, the "balanced braking method" cannot be realized

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