What does Hill Descent Control mean in cars?

[LaJayce]

Hill Descent Control (HDC), also known as the slope control system, is primarily designed to maintain a low vehicle speed and ensure tire traction when driving down steep slopes, allowing the car to safely reach the flat ground at the bottom. Once the HDC function is activated, the driver can release all pedals and focus solely on steering. More details are as follows: 1. HDC mainly works by combining engine braking with the ESP and ABS systems. When HDC is engaged, the transmission remains in first gear, utilizing engine braking to keep the speed within a low range. If the slope is extremely steep and engine braking alone cannot control the speed, the ESP and ABS systems will work together to perform high-frequency "pulse braking," smoothly reducing the vehicle speed to a safe range. 2. HDC has become a standard feature in many off-road vehicles and urban SUVs, helping drivers navigate dangerous steep mountain roads by allowing them to concentrate on steering without worrying about sliding or rollover risks. 3. Using HDC is very simple: just activate the HDC switch before descending a steep slope, then release the accelerator and brake pedals, and the system will start working. The HDC function will immediately deactivate if the brake or accelerator pedal is pressed.