Fuel injector with vibration damper for directly injected petrol engine

摘要

The equipment supplies fuel from a tank (11) to injector valves (24) of individual cylinders (23) via a high-pressure pump (14) and a common line (22) to a collector (28) with a damper (29) containing compressed gas in a metallic bellows (30). The pump is operated by an electromagnetic valve (19) under the control of an electronic unit (27) responsive to the signal from a pressure transducer (26) in the common line. To suppress variations in supply of the pumped fuel, the gas (e.g. nitrogen and argon) filling the bellows is compressed initially to at least 1 Mpa below the normal delivery pressure.