Vehicle gear selection and parking brake joint control system

Abstract

The invention provides a vehicle gear selection and parking brake joint control system which comprises an oil tank, a filter, a hydraulic pump, a safety valve, a gear selection operating valve, a forward gear clutch, a backward gear clutch, a reverse gear clutch, a shuttle valve, a liquid control valve, an energy accumulator, a towing vehicle parking brake, a towing vehicle parking hydraulic cylinder, a liquid control air valve, an air bag, an assistor, a trailer parking brake and a trailer parking hydraulic cylinder. The gear selection operating valve comprises an operating level. According to the vehicle gear selection and parking brake joint control system, when the vehicle is at a neutral gear, a towing vehicle and a trailer have a parking brake function, so that accidents do not occur easily when the vehicles are parked on a ramp for operation. According to the vehicle gear selection and parking brake joint control system, the trailer also has a parking brake function during the parking brake of the towing vehicle without needing the arrangement of a towing vehicle parking brake valve, a pneumatic control valve, a relay valve, a check valve and a second air bag, and a vehicle system is simplified.

Description

technical field [0001] The invention relates to the technical field of vehicle control, in particular to a combined control system for vehicle gear selection and parking brake. Background technique [0002] Trailers include tractors and trailers. Some trailers need to work when they are parked. At this time, the vehicle needs to be put in neutral and the parking brake valve of the tractor should be operated for parking brake. In practice, it often happens that the tractor is not operated. The brake valve performs the parking brake and then stops the operation. At this time, the vehicle is prone to accidents if it is on a slope. In addition, when working on a slope with a large slope, both the tractor and the trailer must have parking brakes to ensure that the vehicle does not slide down the slope. China's authorized announcement number is CN203819220U utility model patent specification discloses a parking brake system for trailers used in coal mines, which solves the proble...

AI Technical Summary

Problems solved by technology

China's authorized announcement number is CN203819220U utility model patent specification discloses a parking brake system for trailers used in coal mines, which solves the problem that the trailer also has brakes when the tractor is parked and braked, but this system needs to be set. Moving valve, air control valve 10, relay valve 11, one-way valve 12, second air bag 13, generally the vehicle also needs to be equipped with gear selection operation valve, so the system is more complicated

In addition, it cannot be realized that the vehicle has a parking brake when it is hung in neutral, so there is a potential safety hazard.

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