Hill starting assistance system

Abstract

The invention provides a hill starting assistance system, which gathers multifaceted electrical signals, automatically controls releasing and triggering of a hill starting assistance function, and does not affect the normal driving operation; and the function is achieved simply, calibration is easy, and the cost is low. A total braking valve is connected with a first pressure switch, and then is connected into a first opening of a relay control piston of a differential relay valve in a communication mode, a parking braking air cylinder is connected with an air inlet of a two-position three-waynormally closed solenoid valve, an air outlet of the two-position three-way normally closed solenoid valve is connected with a second pressure switch, and then connected with a second opening of therelay control piston of the differential relay valve in a communication mode, an air vent of the two-position three-way normally closed solenoid valve is in communication with the atmosphere, a firstcommunication opening of a main piston of the differential relay valve is connected with a rear bridge loop air cylinder, a second communication opening of the main piston of the differential relay valve is connected with a middle rear bridge brake chamber, and TCUs are correspondingly electrically connected with the first pressure switch, the second pressure switch, the two-position three-way normally closed solenoid valve, a hill detection unit, and a function release switch through connecting lines.

Description

technical field [0001] The invention relates to the technical field of gearboxes, in particular to a hill start assist system. Background technique [0002] Today's commercial vehicles are equipped with an obvious trend of automatic transmission systems. The original intention is to reduce the labor intensity of the driver driving the vehicle, reduce the difficulty of the driver's operation of the vehicle, and improve the comfort and safety of the vehicle. However, the application of traditional automatic transmissions in special environments is stretched, especially when driving on hills in cities. [0003] On ordinary commercial vehicles with manual transmission, experienced drivers often control the vehicle to start on a hill through the accelerator, brake, parking brake, and clutch. The slipping and grinding of the clutch is very difficult. Improper application will not only cause the vehicle to slide downhill and cause traffic accidents, but also have a certain impact ...

AI Technical Summary

Problems solved by technology

On a commercial vehicle with heavy load and high torque, this method will cause a lot of heat to accumulate in the clutch, which often accelerates the wear of the clutch and may damage the clutch. The application range is limited

[0005] There are also some automatic transmission vehicles equipped with a vehicle auxiliary braking system to perform auxiliary braking on slope vehicles by controlling the wheel brakes, and cooperate with the slipping of the clutch to achieve the effect of assisting the start of the slope, but the cost is too high and requires assembly A higher-level auxiliary braking system needs to be calibrated with the automatic transmission, so it cannot be widely promoted

Images