Three state magnet valve

The application solenoid valve (16) is connected with pilot solenoid valve (12) so that operation of valve (16) is stopped by a brake cylinder based on control signals. The release pilot solenoid valve (14) and release solenoid valve (18) are connected with valve (16) through brake cylinder. The pressure of fluid at cylinder is exhausted when the fluid pressure is set to atmospheric pressure, by actuating the valve (18) based on operation of valve (14). An independent claim is also included for wheel slip control method using three state magnet valve.