| 摘要 |
PROBLEM TO BE SOLVED: To surely trap stain particulates in fluid in the upstream of a throttle hole to prevent the clogging of the throttle hole and improve the reliability of control of fuel flow by providing a filter in the inflow side of a throttle element in the upstream of the throttle hole. SOLUTION: A fuel injection pump has a passage 2 which is branched at right angle from a connecting passage 1 for supplying fuel to a pump suction chamber at low pressure and which supplies fuel to an electromagnetic to be cooled. An insertion body 5 for adjusting the amount of fuel supplied is inserted into the passage 2, and preferably, the body 5 is arranged near the position where the passage 2 is branch from the passage 1. The body 5 has a bottomed hole 8 in the end 6 opposite to the connecting passage 1 and the bottomed hole 8 has a throttle hole 9 at the end in the radial direction which opens to a ring groove 10 formed in the peripheral wall 11 of the body 5. The end portion 17 neighboring the ring groove 10 has a decreased diameter to form a ring gap 14 functioning as a filter and filtrates the fuel. |
