Hydraulic control system of retarder

Abstract

The invention relates to a hydraulic control system of a retarder. The hydraulic control system comprises an oil disc, an oil pump, a pressure regulating valve, a hydraulic torque converter, a control valve, a cooler and a back pressure valve; the control valve comprises a valve body and a valve rod; the valve body is provided with an oil inlet, an oil return opening, an oil outlet and a plurality of transition openings and used for controlling connection and disconnection between the oil inlet and the transition openings; an oil pump inlet is connected with the oil disc; an oil pump outlet, the pressure regulating valve, the hydraulic torque converter, the oil inlet, one transition opening, the cooler, the oil return opening, the oil outlet and the back pressure valve are sequentially connected in series and then connected into the oil disc, the two ends of the retarder are connected between the two transition openings, and the output end of the cooler is connected with one transition opening. According to the hydraulic control system of the retarder, oil is provided through the oil pump and enters a gear shifting control valve of a hydrodynamic transmission after being adjusted through the pressure regulating valve, then reliable gear shifting is conducted on the hydrodynamic transmission; oil charging and discharging of the retarder are controlled, the heat dissipation performance of the retarder during operation is effectively improved. The hydraulic control system has the advantages of being compact in structure and reliable in operation.

Description

technical field [0001] The invention belongs to the technical field of retarder control devices, in particular to a retarder hydraulic control system. Background technique [0002] The retarder is a key installation component in heavy vehicles. The retarder is mainly used to control the speed of the vehicle when the heavy vehicle is driving on a downhill section, so as to ensure the safety of the vehicle. The transmission technology route adopted by heavy-duty vehicles is mainly based on engine, main clutch, manual gearbox or AMT gearbox. The road conditions of this vehicle are relatively complicated. Slope braking is mainly done by water spraying, etc., which has great potential safety hazards, and the braking effect is not obvious. The patent document with the publication number "CN113324006A" discloses a hydraulic torque converter assembly, which solves the complex road conditions of existing heavy vehicles, frequent shifting and starting, reduced service life of the mai...

AI Technical Summary

Problems solved by technology

The transmission technology route adopted by heavy-duty vehicles is mainly based on engine, main clutch, manual gearbox or AMT gearbox. The road conditions of this vehicle are relatively complicated. Slope braking is mainly done by water spraying, etc., which has great potential safety hazards, and the braking effect is not obvious

The patent document with the publication number "CN113324006A" discloses a hydraulic torque converter assembly, which solves the complex road conditions of existing heavy vehicles, frequent shifting and starting, reduced service life of the main clutch, and downhill braking. There are safety hazards in the movement

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