Air pressure braking mode automatic control system for commercial vehicle and control method thereof

Abstract

The invention discloses an air pressure braking mode automatic control system for a commercial vehicle and a control method thereof, relates to the braking of the commercial vehicle, and provides the air pressure braking mode automatic control system for the commercial vehicle, an air pressure light load braking mode automatic control method for the commercial vehicle, an air pressure heavy load braking mode automatic control method for the commercial vehicle, a manual control method when the air pressure light load braking mode automatic control method for the commercial vehicle fails, and a manual control method when the air pressure heavy load braking mode automatic control method for the commercial vehicle fails. The air pressure braking mode automatic control system for the commercial vehicle is provided with a CAN bus, a vehicle weight sensor, a manual reversing valve, an upper end of a braking gas pipe, a first braking gas pipe, a second braking gas pipe, a lower end of the braking gas pipe, a two-position two-way solenoid directional valve, a solenoid valve driving circuit and a braking mode control unit. Only the vehicle weight sensor, a circuit board and two reversing valves are required to be mounted on the original air pressure braking system; the structure is simple; the occupied space is small; the cost is lower; the system reliability is high.

Description

technical field [0001] The invention relates to the technical field of braking of commercial vehicles, in particular to an automatic control system and a control method for commercial vehicle air pressure braking modes. Background technique [0002] At present, when commercial vehicle manufacturers design the valve port size of the brake air circuit of the pneumatic brake system, most of them install a two-position two-way valve manual reversing valve on the brake air circuit, one of which is a small valve port, according to the energy It is designed to meet the braking requirements of light-load working conditions; the other valve port is a large valve port, which is designed to meet the braking requirements of heavy-duty working conditions. When driving a commercial vehicle that adopts the above technologies, the driver can only choose the corresponding valve position based on experience, but the load of commercial vehicles is changeable, and it is difficult for the driver...

AI Technical Summary

Problems solved by technology

When driving a commercial vehicle that adopts the above technologies, the driver can only select the corresponding valve position based on experience, but the load of commercial vehicles is changeable, and it is difficult for the driver to judge accurately

In addition, this technology increases the workload of the driver, which can easily lead to driving fatigue. If the driver forgets to change the valve position according to the load status of the commercial vehicle, the following dangers will occur: When the large valve port is in the conduction position, the braking system is too sensitive, and it is difficult for the driver to control the braking strength; Insufficient dynamic strength may easily cause traffic accidents

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