What does vehicle hill descent control mean?

[DiMatthew]

Vehicle hill descent control refers to the hill descent control system, also known as the slope control system. Its main function is to maintain a low vehicle speed and tire grip on steep downhill roads, allowing the car to safely descend to flat ground. Once the hill descent control function is activated, the driver can release all pedals and focus on steering wheel control. The hill descent control system primarily works through combined engine braking and the coordinated action of ESP and ABS systems. When activated, the transmission maintains first gear, utilizing engine braking to keep the vehicle speed within a low range. The operational principle is: before descending a steep slope, turn on the HDC switch and release both accelerator and brake pedals - the hill descent control system will then engage automatically. The system immediately deactivates when either the brake or accelerator pedal is pressed.