| 摘要 |
PURPOSE:To provide a solenoid valve for a fuel injection system in a sealing structure made up of machining a clearance in each sliding part between a body and an outer valve as well as this outer valve and an inner valve into a specified size, and providing a magnetic fluid in the sliding parts. CONSTITUTION:When a control system 11 is ON, magnetic force is produced in a solenoid 9 and a body 4, an outer valve 2 and an inner valve 3 are all magnetized so that a magnetic fluid 5 kept in a sliding part by dint of magnetism is composed of a particle of grain size 100Angstrom or so and each of adjacent particles is attracted with one another by dint of magnetic force and thereby the outer valve 2 and the inner valve 3 are deformed in a distance sliding as far as about 50mum or so. With this constitution, a clearance 31 and another clearance 41 are sealed up and any leakage of high pressure fuel is prevented from occurring while both these outer and inner valves 2 and 3 are made slidable. |
