High flow rate fuel valve and fuel supply pump with the valve

Abstract

A high flow rate fuel valve suitable for an accumulator fuel injection device by which a large amount of fuel is amplified using a piston and used and a fuel supply pump using the high flow rate fuel valve are provided. For this purpose, in a fuel supply pump with a fuel inlet valve and fuel outlet valve, the fuel inlet valve has a valve main body, a valve body received in the valve main body, an inlet chamber provided inside the valve main body, inlet holes, a seat portion where the valve body and part of valve main body are in contact with each other. The inlet holes are arranged in a non-radial pattern relative to the inlet chamber.

1 . A high flow fuel valve, comprising a valve main body, a valve body movably installed in the inside of the valve main body, an inlet chamber installed in the inside of the valve main body, inlet holes, a seat portion where the valve body and part of the valve main body are in contact with each other, wherein a plurality of the inlet holes is formed and arranged in a radial pattern relative to the inlet chamber.  
     
     
         2 . The high flow fuel valve as described in  claim 1 , wherein a horizontal cross sectional shape of the inlet chamber is substantially a circle and the inlet holes are arranged in a tangential direction of the inlet chamber.  
     
     
         3 . The high flow fuel valve as described in  claim 1 , wherein the inlet holes are inclined in the vertical direction with respect to the inlet chamber.  
     
     
         4 . The high flow fuel valve as described in  claim 1 , wherein the inlet hole has a diameter of 2 to 12 mm.  
     
     
         5 . The high flow fuel valve as described in  claim 1 , wherein a seat diameter of the valve body is 8 mm or more.  
     
     
         6 . The high flow fuel valve as described in  claim 1 , wherein a fuel-passing area of the inlet hole is larger than a fuel-passing area of the seat portion.  
     
     
         7 . A fuel supply pump comprising a fuel inlet valve and a fuel out let valve, wherein the fuel inlet valve is constructed of a valve main body, a valve body movably installed in the inside of the valve main body, an inlet chamber installed in the inside of the valve main body, inlet holes, and a seat portion where the valve body and part of the valve main body are in contact with each other, where a plurality of the inlet holes is formed and arranged in a radial pattern relative to the inlet chamber.  
     
     
         8 . The fuel supply pump as described in  claim 7 , wherein the fuel supply pump is used in an accumulator fuel injection device for pressurizing fuel at a flow rate of 500 to 1,500 litters per hour to a value of 50 MPa or more.