IC engine fuel injection system with high pump pressure - uses electromagnetically operated three=way valve in fuel path to each fuel injection jet.

摘要

The fuel injection system uses a high-pressure pump (2) and a number of electromagnetic fuel injection devices (5) with a common fuel supply line (4). Each fuel injection device has an electromagnetically-operated three-way valve (14) in the fuel path, with a valve element provided by a double piston shaft having a collar between the pistons on the set needle and the electromagnet side controlling a high pressure and low pressure connection. A high pressure space is defined between the piston on the electromagnet side and the collar and a low pressure space is defined between the collar and the piston on the jet needle sides with a choke between the low pressure space and a vent line provided by a transverse bore in the double piston shaft. USE/ADVANTAGE - Simplified mfr and assembly with rapid closure of fuel injection jet needles.