초록 ▼

A compact pressure regulating valve makes installation work simple and has a hermetic structure of a stationary value member without a specific seal member. A pressure regulator (201) has a body (203) which includes a fuel inlet (215) and an inner periphery for positioning a stationary valve member

A compact pressure regulating valve makes installation work simple and has a hermetic structure of a stationary value member without a specific seal member. A pressure regulator (201) has a body (203) which includes a fuel inlet (215) and an inner periphery for positioning a stationary valve member (205) in a radial direction. When the movable valve member (208) leaves the stationary valve member (205), the valve opens. Operation of the movable valve member (208) is controlled by a diaphragm which moves to balance the pressure of the pressure chamber (211) and the pressure of a back pressure chamber (213) combined with a biasing pressure of a compression coil spring (214). As a result, the pressure of the pressure chamber (211) can be controlled without a specific sealing member or complex structure. In addition, a pressure regulating valve according to the present invention is compact and easy to install, and has no specific member to seal the stationary valve member.

대표청구항 ▼

[ We claim:] [1.] A fuel supply system including a fuel pump disposed in a fuel tank for pumping fuel from the tank to a fuel injector, a fuel filter for removing foreign particles in said fuel before supplying said fuel to the injector, said fuel supply system including a fuel pressure regulating v

[ We claim:] [1.] A fuel supply system including a fuel pump disposed in a fuel tank for pumping fuel from the tank to a fuel injector, a fuel filter for removing foreign particles in said fuel before supplying said fuel to the injector, said fuel supply system including a fuel pressure regulating valve for regulating the fuel supplied to the injector, whereinsaid fuel filter is disposed, at least partially, around said fuel pump, and said fuel pressure regulating valve discharges fuel flowing in said fuel filter into said fuel tank and regulates a pressure of said fuel supplied to said injector, andsaid fuel pressure regulating valve further comprising:a cylindrical case having a fuel inlet chamber having a fuel inlet open to the fuel pumped by the fuel pump, and a fuel outlet chamber open to a fuel outlet to said tank;a diaphragm separating the fuel inlet chamber from the fuel outlet chamber, and the diaphragm having an outer periphery fixed to an inner periphery of said case;a stationary valve fixed to said case between said fuel inlet and said diaphragm;a movable valve member fixed to a central portion of said diaphragm and facing the stationary valve, said movable valve member having a valve aperture closed by said stationary valve when said movable valve member is seated on said stationary valve, and open when the movable valve member is unseated from the stationary valve; anda bias applied to said movable valve member to seat the valve aperture on the stationary valve;wherein said stationary valve comprises a stationary valve member for closing said valve aperture on said movable valve member and a stationary valve guide for aligning said stationary valve member with said movable valve member;said stationary valve guide having a generally thick disk structure with a central convex portion, ribs extending radially from the convex portion to an inner periphery of said case where outer surfaces of the ribs engage the inner periphery of the case, and concave grooves on the disk between the ribs and around the central convex portion of the disk, where the grooves in the disk face the inner periphery of the case to form fuel paths from said fuel inlet to said diaphragm.