VSA System Description - Starting Assist Brake Function
Overview
The starting assist brake function holds the brake pressure for a few seconds when there are no creep forces while auto idle stop is activated. This function prevents slight movement of the vehicle when the engine restarts, and also prevents the vehicle from moving backwards on a hill while the driver transitions from the brake pedal to the accelerator pedal.
Control
When the CAN gateway is ready to output an operation request for starting assist brake function and the brake pedal is released by the driver, the starting assist brake function holds the brake pressure according to requested brake pressure from the CAN gateway.After the driver transitions to the accelerator pedal, the engine is restarted, and the creep force is restored to the programmed level, the starting assist brake function will release the brake pressure.The starting assist brake function may not be activated when the driver does not press the brake strongly enough upon stopping the vehicle or when the driver releases the brake pedal gradually upon starting the vehicle.