Fuel injector e.g. piezo injector for injecting diesel into internal combustion engine, has circular attachment co-acting with leakage space between valve needle control chamber section and valve needle tip section
摘要
<p>The injector has a valve needle arranged in a valve body (17) in a longitudinal movable manner. A valve needle tip (18) is designed at a valve needle tip section (14) and co-acts with a valve seat of the valve body. A valve needle control chamber section (13) exhibits a larger diameter than that of the valve needle tip section. A circular attachment (22) co-acts with a leakage space (21) between the valve needle control chamber section and the valve needle tip section. The leakage space is connected with a low pressure system.</p>
