Pressure control valve component for use in injector of e.g. diesel engine, has valve unit controlling fuel flow from chambers to low pressure channel, and closing throttle channels, when valve unit blocks throttle defining surface

摘要

The component (10) has a pressure control chamber (101) supplied with fuel by a high pressure fuel channel. A low pressure channel (105) is configured to be held under a pressure lower than pressure in the high pressure channel. Throttle channels (104) connect the chamber and the channel (105). A valve unit (160) closes and opens the channels (104) and controls fuel flow from the chambers to the low pressure channel. The throttle channels have ends in a throttle defining surface (102). The valve unit closes the throttle channels, when the valve unit blocks the throttle defining surface.