Cooling-liquid medium type hydraulic retarding device for vehicle

Abstract

The invention discloses a cooling-liquid medium type hydraulic retarding device for a vehicle. The cooling-liquid medium type hydraulic retarder comprises a hydraulic retarder and a control unit, wherein the control unit can control the working of the hydraulic retarder; the hydraulic retarder is arranged between a vehicle engine crankshaft and a flywheel, and is provided with a retarding working cavity. The cooling-liquid medium type hydraulic retarding device also comprises an inlet pipeline, an outlet pipeline, a pump, a returning pipeline, an inlet throttling valve and an outlet throttling valve; the liquid outlet end of a returning pipeline, the inlet pipeline, the retarding working cavity, the outlet pipeline and the liquid inlet end of the returning pipeline are communicated in sequence to form a circulating pipeline; the pump is connected in the circulating pipeline which is also communicated with a cooling-liquid cavity of an engine; the inlet throttling valve is connected on the inlet pipeline; the outlet throttling valve is connected with the outlet pipeline; the inlet throttling valve and the outlet throttling valve are respectively connected with the control unit in a control manner. The cooling-liquid medium type hydraulic retarding device disclosed by the invention has the advantages that the cooling liquid of the engine is adopted as a medium, the volume is small, the weight is light, the cost is low, the structure is compact, the installation is convenient and the retarding and braking torque can be effectively provided.

Description

technical field

[0001] The invention relates to a vehicle coolant medium type hydraulic retarder, which belongs to the technical field of vehicle auxiliary braking. Background technique

[0002] When the vehicle is under continuous braking for a long time, high-intensity braking or frequent braking, the temperature of the brake disc or brake drum will increase significantly, resulting in a decrease in the friction factor, aggravated wear, and partial or even complete loss of braking performance. Dangerous thermal recession phenomenon. Although the application of anti-lock brake system (ABS) and electronic brake force distribution system (EBD) has improved the stability and reliability of vehicle braking, they have little effect on the thermal fading phenomenon of brakes. At present, many countries including my country have clearly stipulated that passenger cars and trucks above a certain specification must be equipped with auxiliary braking devices to effectively divert...

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