What does the auto hold function in a car mean?
2 Answers
The auto hold function in a car is an automatic braking feature. Once activated, it simplifies operation by eliminating the need to use the handbrake or electronic parking brake. In some car models, this function is labeled as AUTOHOLD on the button, while in others, it's represented by a pair of semicircles enclosing the letter A inside a circle. Despite the different styles, the function of the button remains the same. The auto hold feature is an extension of the Electronic Stability Program (ESP) and controls the braking of all four wheels through the ESP system. During this process, the ECU computer uses sensors installed on the vehicle to determine the vehicle's levelness and wheel torque, deciding whether braking is necessary to prevent rolling. The braking force applied to the wheels is not excessive, just enough to prevent the vehicle from moving, ensuring that when the accelerator is pressed again to move forward, there won't be a severe jerking motion.
I've been driving for over a decade and find the auto-hold feature extremely practical. It means when stopping at red lights or in traffic jams, you don't need to keep pressing the brake pedal - the car automatically holds still without rolling. For example, on slopes or at crowded intersections, it saves you effort and reduces the risk of fatigued driving. Operation is simple, just press the button to activate. This is much more convenient than traditional handbrakes, especially for frequent stops in city driving, saving energy to focus better on road conditions for improved safety. Auto-hold usually works with electronic brake systems, and some new cars can even automatically activate parking assist functions. Regular brake system checks are recommended to ensure proper operation.
