1. The traction control system the TRC
traction control system Traction Control System, referred to as TCS, also known as ASR or the TRC. Role is to make the car can get the best traction in all driving conditions. Car in motion, the driving force required to accelerate, turn require lateral forces. These two forces are derived from tire friction on the ground, but the tires have a maximum friction on the ground. On a smooth road surface friction coefficient is small, and the driving force of the car are very small lateral force.
The control device
traction control system is a computer. Using a computer to detect the speed of the four wheels and a steering angle of the steering wheel, when the vehicle acceleration, if the detected rotational speed to the drive wheels and non-driving wheel is too large, the computer immediately determines the driving force is too large, issues a command signal to reduce the fuel supply amount of the engine , the driving force is reduced, thereby reducing the driving wheel slip ratio of the tire. Computer control of the driver through the steering wheel angle sensor steering intention, and then using the left and right wheel speed sensor for detecting the left and right wheel speed difference; to determine whether the vehicle is turning and the degree of the driver’s steering intention same. If the car detects understeer (or oversteer), the computer immediately determine the driving force of the driving wheel is too large, it issued a directive to reduce the driving force, in order to achieve the driver’s steering intention. When the tire slip rate is moderate, the car can obtain the maximum drive force. If the tire when cornering a greater slip, will accelerate the ability of the car changed for the better. The system may utilize steering sensor detects a car traveling state, it determines the car is traveling straight or cornering, and to appropriately change the slip ratio of each tire.
ASR is drive-slip system (Acceleration Slip Regulation) short, its role is to prevent the car from starting, a driving wheel slip during acceleration, especially during idling to prevent the car wheels asymmetrical road or turns, and slip ratio is controlled to 10 percentage mdash; 20 percent range. Since ASR mostly by adjusting the driveWheel driving force control is implemented, so known driving force control system, referred to as the TCS, also in Japan, referred to TRC or TRAC.
ASR and ABS works has many aspects in common, and thus often used in combination the two, having a configuration and a driving wheel antilock braking slip Control (ABS / ASR) system. The system consists of wheel speed sensors, ABS / ASR ECU, ABS actuator, the ASR actuators, stepper motors and the sub-throttle control the primary and secondary throttle position sensors and other components. When the car start and during acceleration, operation, ECU according to the wheel speed sensor input signal, the drive wheel slip ratio exceeds the determination threshold value, the process proceeds to runoff: First, the sub ECU secondary throttle section by a stepping motor valve opening is reduced to reduce the intake air amount, the engine output torque decreases. When the ECU determines the need for intervention braking drive wheels, will transmit a signal to the actuator ASR, independently of the drive wheel (usually the rear wheels) is controlled to prevent the driving wheel slip, the slip ratio and the driving wheel holding within the specified range.
TRC active traction control system for a mechanical structure capable of preventing the drive wheels when traveling on a wet road surface and the like snow vehicle idling, the vehicle can be smoothly started, accelerated, which support basic functions of the vehicle is traveling. In snow or muddy roads, TRC active traction system can ensure smooth acceleration. Further, the upper and lower steep, dangerous rock road surface, the four-wheel drive off-road vehicle unique traffic, the TRC wheel slip can be properly controlled, compared with a conventional vehicle center differential locking device and words, the vehicle is equipped with a former TRC unmatched ride quality and handling.