What does HDC mean in vehicles?

[VonHarper]

HDC, also known as Hill Descent Control, enables drivers to smoothly navigate steep downhill slopes without the need to press the brake pedal, maintaining full control. Additional details: 1. When driving downhill, if the vehicle's speed becomes too fast, pressing the HDC switch forces the vehicle to descend at a slower pace, eliminating the need for constant braking. 2. The principle of the HDC system involves the combined action of engine braking and the ABS anti-lock braking system, allowing the vehicle to maintain a 'low speed without losing tire grip' on steep descents. 3. Once HDC is activated on a steep slope, engine braking alone can provide significant deceleration without the risk of tire lock-up. If the slope is too steep and engine braking is insufficient to maintain the speed limit, HDC utilizes the ABS system to intermittently apply the brakes when necessary, gradually reducing increasing speed to ensure a stable and safe descent.