What are the reasons for the malfunction of the car's descent control function?
1 Answers
Descent control function malfunction may be caused by a parking system failure. Here is a related introduction to the descent control function: 1. Introduction: The Hill Descent Control (HDC) system allows the driver to smoothly pass through steep downhill sections without stepping on the brake pedal, maintaining complete control. As needed, the braking system automatically controls each wheel to move forward slightly faster than walking speed, allowing the driver to focus entirely on steering. 2. Principle: The system combines engine braking with the ABS anti-lock braking system to maintain a "low speed without losing tire grip" state when the vehicle is descending a steep slope. HDC must be activated when the transmission is in 1st gear or reverse (there are two types of steep descents: forward and reverse). The system typically sets an upper speed limit. When HDC is activated and the vehicle enters a steep slope, engine braking alone can provide a significant deceleration effect without the risk of tire lock-up. If the slope is too steep and engine braking is insufficient to maintain the speed limit, HDC can use the ABS system to initiate intermittent braking as needed to reduce the gradually increasing speed, ensuring a stable and safe descent. If the driver needs to steer to avoid obstacles during the descent, the HDC system will detect this and further reduce the speed limit to 6.4 km/h to ensure complete vehicle control.
