Fuel injector for internal combustion engine, has control valve to interrupt fuel supply under high pressure of injection valve and for pressure relief of injection valve to pressure relief area during injection pause

摘要

A nozzle needle (103) is placed axially displaceable inside an injector housing (101), while an injection nozzle (180) is placed at front of housing. A high pressure channel (107) feeds fuel under high pressure to a nozzle pre-chamber (108). A control valve (110) interrupts supply of fuel under high pressure of an injection valve (140), and enables pressure relief of injection valve in pressure relief area during injection pause.