F - Mech Eng,Light,Heat,Weapons – 02 – M
Patent
F - Mech Eng,Light,Heat,Weapons
02
M
F02M 57/02 (2006.01) F02D 41/38 (2006.01) F02M 59/10 (2006.01) F02M 63/00 (2006.01) F02M 63/02 (2006.01) F02B 75/18 (2006.01) F02F 7/00 (2006.01)
Patent
CA 2115034
2115034 9307378 PCTABS00021 In a hydraulically-actuated electronically-controlled unit injector, the viscosity of the actuating fluid used to actuate the unit injector varies with ambient temperature and affects the magnitude of pressure drops in the actuating fluid circuit. Such variations in viscosity affect the magnitude of the fuel delivery command pulsewidth and/or actuating fluid pressure required for engine startup versus that required for normal engine operation. The present invention provides an improved hydraulically-actuated electronically-controlled unit injector (18) and methods of operation which compensate for variations in the viscosity of the actuating fluid used to hydraulically actuate a piston (88). The stroke of the piston (88) is controlled electronically and/or mechanically in order to achieve an appropriate amount of fuel injection.
Ausman Thomas G.
Longman Douglas E.
Stockner Alan R.
Caterpillar Inc.
Kirby Eades Gale Baker
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