Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1992-09-04
1993-09-21
Wolfe, Willis R.
Internal-combustion engines
Charge forming device
Fuel injection system
1231799, 12317917, 123446, F02N 1700, F02M 5900
Patent
active
052459705
ABSTRACT:
A diesel engine having a lubricating oil sump and a low pressure lubricating oil pump, is provided with a hydraulically-operated, electronically-controlled unit fuel injector operating system of the type having a unit fuel injector, a high pressure pump, a high pressure lubricating oil supply passage from said pump to said unit injector, a fuel supply to said unit injector, and an electronically controlled valve in said unit injector for controlling the application of the pressure of the lubricating oil to force said fuel to be expelled from said injector, wherein a priming reservoir is operatively connected to the low pressure lubricating oil pump and disposed upstream and above the high pressure supply pump and above the high pressure supply passage, preferably being disposed in the engine front cover and having a restricted return line to the oil sump for venting air from said reservoir, a siphon passage establishes fluid communication between said reservoir and said high pressure passage independently of the high pressure supply pump, and a check valve is disposed in the siphon passage to permit fluid flow from said reservoir to said high pressure passage, when the engine is not operating, while preventing flow from the high pressure passage to the priming reservoir, when the engine is operating.
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Iwaszkiewicz Titus J.
Meisner David B.
Rogalla Ronald J.
Moulis Thomas
Navistar International Transportation Corp.
Sullivan Dennis K.
Wolfe Willis R.
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