What does the AVH Auto Hold System mean

[LeRiver]

Auto Hold refers to an automatic braking function. After activating this feature, such as when stopping at a traffic light, it eliminates the need to pull the handbrake, simplifying operations by avoiding the use of manual or electronic parking brakes. For automatic transmission models, it also reduces the need for frequent shifting between D to N or D to P. The functions of the Auto Hold system include: 1. Preventing rollback: When stopping briefly at a traffic light, the system automatically applies the brakes to the wheels after the vehicle comes to a complete stop to prevent rolling. 2. Preventing backward sliding: During uphill starts, the system automatically brakes to prevent backward sliding, and releases the wheels automatically when starting to move forward. 3. Automatic braking: Some models automatically apply the brakes to the wheels when the vehicle is parked and locked, eliminating the need to pull the handbrake. Working principle of Auto Hold: When the vehicle is temporarily stopped and needs to restart shortly after, the parking function is handled by the ESP-controlled brakes. The computer uses a series of sensors to measure the vehicle's levelness and wheel torque, determines any tendency for the vehicle to move, and applies an appropriate braking force to the wheels to keep the vehicle stationary. This braking force is just enough to prevent movement without being excessive, ensuring a smooth start when the accelerator is pressed again. If the temporary stop exceeds a certain duration, the braking system switches to mechanical rear-wheel parking (activating the electronic parking brake) instead of the previous four-wheel hydraulic braking. When the vehicle is ready to move forward, the electronic system detects the accelerator pedal pressure and, for manual transmission models, the clutch pedal travel to determine whether to release the brakes.