Patent ID: 6848753

Claim:
An emergency brake apparatus for a vehicle comprising: a hydraulic power source for supplying a pressure oil; a front tire wheel brake receiving the pressure oil so as to brake a front tire wheel; and a rear tire wheel brake receiving the pressure oil so as to brake a rear tire wheel, stopping the rear tire wheel by a spring so as to park the vehicle, and releasing the spring by the pressure oil so as to move the vehicle, wherein the pressure oil of the hydraulic power source is changed in pressure to a pilot oil pressure which is reduced from a high pressure to a low pressure in response to an operation amount of an emergency brake valve which is operated at an emergency time, thereby being output to a relay valve, and the pressure oil of said hydraulic power source is increased from a low pressure to a high pressure in an inverse proportional manner in response to the pressure of the pilot oil pressure received by the relay valve, thereby outputting to said front tire wheel brake so as to urgently brake the front tire wheel.