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"Modern Sonata eight (left), long moving (right) equipped with VSM system" lane keeping is a function to improve traffic safety. This function is to monitor the road separation line in front of the rear view mirror hidden in the back of the central mirror of the car to determine the position of the body. When the steering light is not opened, if the body appears "run off" In the case of the system, the system will send out warning hints. With the gradual development of this function, lane maintenance system with active correction function has also appeared. As for the correction model, one of them is to use the ESP system to brake the wheels on the opposite side of the steering direction, so that the vehicle produces the opposite direction of the torque, so that the vehicle will return to the right track. Of course, a more advanced way of correction is to make the electric power steering system control the steering wheel through a set of proper logic. An electronic differential lock is an extension function that depends on the ABS/ESP system to judge the working state of the wheel and the state of the vehicle. When the inside wheel will slip or skid, the brake system can brake the wheels of the inner front wheel, which is equivalent to increasing the adhesion coefficient on the side of the skidding wheel. As long as the effective torque is raised to the wheel end, the differential can transmit sufficient driving torque to drive the lateral wheel to drive the vehicle to keep the direction of the vehicle as long as the adhesion coefficient is higher than that of the external adhesion wheel. Therefore, the "electronic differential lock" is not a real lock, it is just a function extended by the system. Self adaptation means keeping the distance from the car automatically, which means that the front car and the vehicle must also brake automatically. The control unit uses appropriate logic to link the radar to the ESP system, so as to realize the automatic braking function when the distance from the front car is shortened. In other words, if anyone tells you that this car has an adaptive cruise function, it must be equipped with a ESP system. Compared to the direct tire pressure monitoring of the pressure sensors installed in the tire, the cost of indirect monitoring using the ABS system to monitor the tire pressure monitoring function is much lower. It uses a wheel speed sensor to compare the speed of four tires. If one of the tire pressure is low, its speed will be faster than the other wheels. So as long as the software is adjusted, a new function can be established to warn the driver of a lower tire pressure than the other three. However, there are two problems in the vehicle using the indirect tire pressure monitoring device. One is that the type of the indirect tire pressure monitoring device can not specify which tire pressure is insufficient; secondly, if the tire pressure of the four tires is falling at the same time, then the device will fail. Vehicles with ramp auxiliary functions can detect whether the vehicle is in a horizontal state by a horizontal position sensor. If the vehicle stops on the ramp, the system will automatically brake the wheel. The time of the automatic brake can be kept for about 2 seconds to prevent the vehicle from slipping in the process of loosening the brake to the throttle. The automatic parking button on the Audi A4L can also automatically brake when the vehicle is in a horizontal state, even if the D gear does not have to step on the brake for a long time. When you need to release, you just need to step on the accelerator pedal. Although the names are different, the principle of vehicle stability system is basically the same. TOYOTA VDIM and BMW DSC systems are somewhat different from those of other manufacturers. The VIDM system adds to the interference of the steering system, making the driver more relaxed on the track correction; the DSC system on BMW has added adjustable function to reduce the impact on driving pleasure. In addition, the ESP system is not isolated, and it can also extend a series of functions of active safety and convenient driving based on it.