First popular science: HDC (Steep Slope Descent System): Also known as the slope control system HDC, this system was first seen on the Freelander model released by Land Rover in 1997, and then extended to be used on the Discovery, the signature car series of the same manufacturer. The principle is After the vehicle enters a steep slope, it is decelerated by engine braking, so the tires will not be locked. When the steep slope is too large and the engine braking loses control of the vehicle speed, the ABS system will intervene, and the computer will use a point brake to reduce the vehicle speed to prevent the wheels from locking up.
Everyone knows that steep slope descent is a very useful configuration in off-roading, especially when the low-adhesion road (such as sand, gravel road, ice and snow road, etc.) is downhill, because the speed of the car is slow, step on the brake to control the speed ABS will not intervene (because it does not meet the conditions for ABS intervention), it will cause the wheels to lock up, and it is easy to lose control of the car, causing a very big danger. Therefore, there is a saying in the off-road industry that "uphill is easy to go downhill". The HDC system will seamlessly connect the two states of engine braking and ABS intervention, so that the tires will not lock up.
Things are good things, but the steep slope descent of many models on the market is a bit embarrassing. The minimum speed of the car can only be controlled at 10 per hour. Sometimes the speed is too fast when the slope is large and the road conditions are poor. Therefore, the slower the slowest downhill speed can be set, the easier it is to use. Stelvio (parameter|inquiry) continues the light luxury stacking route. A complete set of electronic control system is in line with Maserati. HDC also uses the highest form, which can reach a speed of 2km/h, which is already the highest-end.
Stelvio is not designed for off-road use, but this configuration is also a safety configuration. Imagine that you need to go downhill for a long distance, especially when the road is slippery. It is safe to control the speed. How about the steep slope that this car is equipped with? How to use: Click the button on the steering wheel, a white icon will appear on the dashboard;
Then during the downhill process, the on-board computer will automatically detect the downhill status, the icon will turn green, and it will go downhill at the set speed;
You can press the brake if you need to reduce the speed, and release the brake when the speed drops to the required level.