Hydraulic auxiliary starting and hydraulic auxiliary braking device for heavy-duty and commercial vehicle

Abstract

The invention relates to a hydraulic auxiliary starting and hydraulic auxiliary braking device for a heavy-duty and commercial vehicle and belongs to important power transmission and hydraulic auxiliary braking parts and assemblies of the heavy-duty and commercial vehicle. The hydraulic auxiliary starting and hydraulic auxiliary braking device mainly comprises an engine, a dry clutch and a transmission and also comprises a hydraulic coupling assembly (6), a wet clutch assembly (13) and a band brake (15). The left end of the dry clutch shell (5) is connected with a flywheel (1), while the right end is connected with a pump wheel (7) of a hydraulic coupling. A dry clutch pressure plate (4) is connected with a release bearing of the dry clutch. A dry clutch driven disk (3) is connected with a shaft (9). A turbine (8) of the hydraulic coupling is connected with a wet clutch outer drum (10). The band brake (15) is arranged on the wet clutch outer drum (10). A wet clutch external friction steel sheet (11) is connected with the wet clutch outer drum (10). A wet clutch internal friction sheet (14) is connected with a wet clutch inner drum (12). The wet clutch inner drum (12) is connected with the shaft (9).

Description

technical field [0001] The invention relates to a novel dual-function device of hydraulic auxiliary starting and hydraulic auxiliary braking for heavy-duty and commercial vehicles, which belongs to important power transmission and hydraulic auxiliary braking components and assemblies of heavy-duty and commercial vehicles. technical background [0002] At present, heavy-duty and commercial vehicles are developing in the direction of high power and high load. Heavy-duty and high-speed transportation put forward very strict requirements on the performance of vehicles. The power transmission mode of traditional heavy-duty and commercial vehicles has two serious disadvantages: ①The traditional power transmission mode of heavy-duty and commercial vehicles based on engine→dry clutch→transmission (or mechanical automatic transmission AMT) is not suitable for smooth control when the car starts , which greatly affects the driving and riding comfort; ②In mountainous and hilly areas, t...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the phenomenon of brake heat fading caused by excessive brake temperature rise in traditional heavy-duty vehicles when the starting stability is not easy to control, long-distance or long-term downhill and frequent braking, which eventually leads to braking failure. Safety issues, a new type of hydraulic assisted starting and hydraulic assisted braking device for heavy-duty and commercial vehicles is proposed, which can make the vehicle start more smoothly, reduce the impact load in the transmission system and improve the braking performance of the vehicle

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