What is Hill-start Assist Control?
2 Answers
Hill-start Assist Control (HAC) is a system that applies braking force to all four wheels to prevent the vehicle from rolling backward, effectively reducing the risk of rollback accidents when parking on a slope. HAC, an acronym for Hill-start Assist Control, is a function derived from the ESP system. Here is more information about Hill-start Assist Control: 1. Conditions for use: The function can be activated when the gear lever is in any position other than P (for automatic transmission models), the parking brake is not engaged, the accelerator pedal is not pressed, and the vehicle is stationary, with the driver further pressing the brake pedal. 2. Function: It assists in temporarily applying braking force to all four wheels (for a maximum of about 3 seconds) to prevent the vehicle from rolling backward.
Hill Start Assist is a great feature I discovered after buying my car. When I used to drive a manual transmission, starting on steep slopes at traffic lights was always a nerve-wracking experience—fumbling with gear shifts while the car kept rolling backward, risking a bump to the rear bumper of the car behind. Later, during a test drive of my new car, the salesperson taught me to turn on this feature—it automatically holds the brakes for two to three seconds on a slope, giving me enough time to press the accelerator. The principle is that the car's computer system detects the incline and briefly locks the brakes to prevent rolling back. Especially during road trips in mountainous cities, I can now start smoothly even on the steepest slopes without worrying about the embarrassment of rolling backward. New drivers should definitely set this as a frequently used feature.
