F - Mech Eng,Light,Heat,Weapons – 02 – M
Patent
F - Mech Eng,Light,Heat,Weapons
02
M
123/140
F02M 61/06 (2006.01) F02M 47/02 (2006.01) F02M 57/02 (2006.01) F02M 59/46 (2006.01) F02M 61/20 (2006.01) F02B 3/06 (2006.01)
Patent
CA 1228269
C-3624 D-8,188 ELECTROMAGNETIC UNIT FUEL INJECTOR Abstract of the Disclosure An electromagnetic unit fuel injector for use in a multi-cylinder diesel engine has an externally actuated pump for intensifying the pressure of fuel delivered to a pressure actuated injection valve controlling flow discharge out through a spray outlet and which is normally biased to a closed position by a spring. Pressurized fuel from the pump is also supplied via a throttling orifice to a modulated pressure servo control chamber having a servo piston means operatively associated with the injection valve. drain passage extends from the servo control chamber with flow therethrough controlled by a solenoid actuated control valve in the form of a poppet valve which is normally biased to a closed position by a valve return spring of predetermined force whereby the control valve is also operative as a pressure relief valve and preferably, a secondary pressure relief valve means is also incorporated into the unit injector so that all of the unit injectors for the engine will operate at a uniform maximum peak pressure.
477739
General Motors Corporation
Gowling Lafleur Henderson Llp
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