Vehicle automatic braking system

The utility model discloses an automobile automatic braking system comprising a hydraulic component, a sensor, an electrically-controlled unit and an electromagnetic valve. The sensor component is connected with the input terminal of the electrically-controlled unit. The electromagnetic valve is connected with the output terminal of the electrically-controlled unit. The electromagnetic valve is connected with the hydraulic component. The utility model applies the electronic control technology to positively control the vehicle. The vehicle state is recognized the sensor. When the vehicle is recognized as at the dangerous date, the electrically-controlled unit sends the command of braking control, a supercharging valve is turned on, a pressure relief valve is turned off, a trip valve is turned off, the oil enters the right cavity of a hydraulic pressure conversion valve, the piston is pushed to move left, the left oil cavity of the hydraulic pressure conversion valve is reduced, the wheel brake works, the vehicle is decelerated. When the vehicle is at a safe state, the electrically-controlled unit sends a command of releasing the braking control. The piston restores to the initial position under the action of the spring, the braked wheel is released. The utility model realizes the intellectualization of the vehicle braking system, enabling a more safe and reliable driving.