Overflow valve for inlet pipe of dosing unit of high-pressure pump of fuel injecting device of internal combustion engine, has spring area that is connected with inlet via pressure balance pipeline, where throttle is provided in pipeline

摘要

The valve (7) has a valve housing (8) comprising an inlet (9) and an outlet (10), where the outlet is connected with an inlet pipe and a fuel tank. The outlet is closable by a control piston (12) that is movably guided into the valve housing against the force of a compression spring (11). A spring area (19) is connected with the inlet via a pressure balance pipeline (17), where a throttle (18) is provided in the pressure balance pipeline. The control piston is rigidly connected with a guide rod (15).