1、 ASR solenoid valve
1.1 role of ASR
ASR (anti slip regulation), also known as automatic traction control system, is a set of system based on ABS system to control the slipping driving wheel.
1.2 advantages of installing ASR
The driving force and steering force of the vehicle are maintained. When the vehicle starts, accelerates and turns on the slippery road, the driving stability is guaranteed. The warning light can remind the driver of the slippery road, reduce the tire wear to the minimum degree and further reduce the possibility of accidents
1.3 control mode of ASR
Bridge control: implement differential control. If the driving wheel is on the road with different adhesion coefficient and the vehicle speed is less than 35km / h, it can reduce the slip rate and improve the driving force by braking the slipping driving wheel.
Engine control: when the vehicle speed is more than 35km / h or the driving wheels on both sides are on the smooth road, the maximum driving torque is output by controlling the engine speed; the driving wheel speed is controlled, so as to reduce the slip rate, improve the driving force and ensure the steering maneuverability.
1.4 ASR solenoid valve
1.4.1 function of ASR solenoid valve
ASR solenoid valve is the executive part of ASR system. When the driving wheel of the vehicle slips, the ECU will give an electrical signal to the ASR solenoid valve. After receiving the electrical signal, the ASR solenoid valve will control the braking force on the driving wheel of the vehicle by opening and closing the solenoid valve core, so as to maintain the maximum adhesion of the driving wheel of the vehicle and prevent slipping.
4.4.2 ASR solenoid valve of our company