F - Mech Eng,Light,Heat,Weapons – 02 – B
Patent
F - Mech Eng,Light,Heat,Weapons
02
B
123/131, 123/257
F02B 77/00 (2006.01) F02B 77/04 (2006.01) F02D 37/02 (2006.01) F02B 1/04 (2006.01) F02D 41/04 (2006.01)
Patent
CA 1314448
C-3988 ENGINE WITH SPARK IGNITION OPERATION THROUGH THE OIL PRESSURE SWITCH AFTER FUEL SHUTOFF Abstract of the Disclosure A motor vehicle engine includes an operator controlled fuel injection enabling switch effective to disconnect electric fuel injection apparatus from an electric power source and thus initiate the cessation of engine operation when deactivated. However, the spark ignition system is still powered through an oil pressure switch so as to continue engine operation for a few extra crankshaft rotations to reduce the unburned fuel in the intake passage as the engine stops and thus reduce throttle bore coking. In a vehicle having a fuel pump relay activated by the fuel injection enabling switch with contacts connected across the oil pressure switch, the invention may be obtained by changing the power connection of the spark ignition system from the fuel injection enabling (ignition) switch to the fuel pump relay.
575816
Grenn Daniel Paul
Wallo Gary John
General Motors Corporation
Gowling Lafleur Henderson Llp
LandOfFree
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