Will the car roll away after using the electronic parking brake when parked?

[DelLuna]

Using the electronic parking brake after parking will not cause the car to roll away. Here is the relevant introduction to the electronic parking brake: Electronic Parking Brake: The electronic parking brake, also known as the Electronic Parking Brake (EPB) system, integrates the temporary braking function during driving with the long-term braking function after parking, and achieves parking braking through electronic control technology. How the electronic parking brake works: The electronic parking brake is a technology that achieves parking braking through electronic control. Its working principle is the same as that of a mechanical handbrake, both relying on the friction generated between the brake disc and the brake pads to control parking braking. The only difference is that the control method has changed from the previous mechanical handbrake lever to an electronic button.

[JaxonFitz]

I'm particularly qualified to speak on this issue because I encountered a similar situation last year while driving an SUV in Chongqing. Using the electronic parking brake after parking can indeed lead to vehicle rollaway, but it depends on the specific circumstances. On flat surfaces, the electronic parking brake usually holds the vehicle securely—my Honda has never rolled in supermarket parking lots. However, steep slopes are different, especially those exceeding 15 degrees, where the electronic parking brake alone may not be sufficient. I've found that engaging the P (Park) gear provides additional security through the transmission's parking pawl. It's advisable to wait a few extra seconds on slopes to allow the electronic parking brake to fully engage. Newer models now come equipped with incline sensors that automatically increase braking force, which significantly helps prevent rollaway.

[VanErin]

When it comes to preventing rollback with electronic parking brakes, the key lies in the vehicle's condition and driving habits. On regular roads, rollback is unlikely as the motor-driven calipers of the electronic parking brake clamp the brake discs with sufficient force for everyday parking. However, on icy or steep slopes, I've seen friends' cars slide slightly. Here's a handy tip: after stopping with the foot brake, shift to Neutral (N), wait for the electronic parking brake indicator to stay lit, then shift to Park (P) for triple security. For manual transmission cars, it's best to also turn the steering wheel to full lock when parking on slopes. Remember, regular maintenance is crucial—if the caliper screws rust, the electronic parking brake's effectiveness diminishes.

[DiJayce]

From an engineering perspective, this is quite clear. When the electronic parking brake is engaged, the motor presses the brake pads firmly against the brake disc to generate static friction. On level ground, this force is entirely sufficient to counteract the vehicle's gravitational component. However, on steep slopes, gravity decomposes into a downhill force along the incline. If this exceeds the maximum static friction of the brake pads, the vehicle may roll. That's why I've developed a habit when parking on steep slopes: after coming to a complete stop, I firmly press the brake pedal once more before engaging the handbrake. Most modern vehicles now feature dynamic compensation - the system automatically applies additional braking if it detects vehicle movement. Nevertheless, I still recommend checking whether the parking brake indicator on the dashboard remains steadily illuminated, as this provides the most direct confirmation.