How to Use the Hill Start Assist Function in a Car?
2 Answers
Method to use the hill start assist function in a car: When starting the vehicle on a steep or slippery slope, the driver switches from the brake pedal to the accelerator pedal, which may cause the vehicle to roll backward, making it difficult to start. To prevent this situation, the hill start assist control temporarily applies brakes to all four wheels to prevent the vehicle from rolling back. Working principle of the hill start assist system: When the vehicle is on an uphill slope, at the moment the foot leaves the brake pedal and moves to press the accelerator, the HAC system automatically maintains brake oil pressure for 2 to 3 seconds, preventing the vehicle from rolling back due to gravity and inertia. When the accelerator is pressed, the system gradually reduces the braking force. Once the HAC's brake control ends, the vehicle moves forward steadily as the accelerator is pressed. If the accelerator is not pressed, the HAC's automatic brake control will also end after 2 to 3 seconds.
After driving for so many years, I've gotten used to the hill start assist function and find it very practical. The operation is quite simple: when stopping on an uphill slope, press the brake pedal to bring the vehicle to a complete stop, then release the brake pedal. The system will automatically maintain braking force for about 1-3 seconds, preventing the car from rolling back, giving you time to press the accelerator and start moving. This feature usually activates automatically in automatic transmission vehicles when a sufficiently steep slope is detected; for manual transmission cars, you might need to manually turn it on—check your vehicle's manual to be sure. I particularly like using it at steep intersections or when taking tickets in parking lots, as it eliminates the hassle of using the handbrake to start. Especially on rainy days or snowy roads, it significantly reduces the risk of rolling back and rear-end collisions. With regular practice combining throttle and brake inputs, it makes driving even more stable.
