Patent ID: 6823836
Filing Date: 2004-11-30
Classification: B60T

Abstract:
A supplementary brake for a vehicle, the brake comprising:oil pressure supplying means; oil pressure control means for controlling oil pressure supplied from the oil pressure supplying means, wherein said oil pressure control means comprises: a valve body equipped with a cylinder; a regulated oil passage formation body inserted into the cylinder to form a regulating oil passage for regulating the flow of oil in the cylinder; a check ball positioned at one end of the regulating oil passage of the regulated oil passage formation body; a check piston so mounted as to slide within the cylinder and having a check spring resiliently supporting the check ball; a constant pressure spring resiliently supporting the check piston; and a closing cap supporting the constant pressure spring to the valve body to close said cylinder pulsatory pressure forming means for forming a pulsatory pressure to the oil pressure supplied from the oil pressure control means to a profile of an engine injection cam; valve opening and closing means for opening and closing an exhaust valve of an engine according to the pulsatory pressure formed by the pulsatory pressure forming means; and a controller for controlling said oil pressure supply means according to the operating state of the engine.