Internal-combustion engines – Lubricators – Crankcase – pressure control
Patent
1998-12-23
2000-07-04
Solis, Erick
Internal-combustion engines
Lubricators
Crankcase, pressure control
123 73AD, 184 65, F01M 100, F01M 302
Patent
active
060823224
ABSTRACT:
An improved method and system for automatically continuously replacing an engine's used lubricating oil with fresh lubricating oil throughout operation based on engine operating conditions is disclosed. The present system includes an injection control device for injecting small amounts of used lube oil into the engine's fuel system and an auxiliary flow control device for directing controlled quantities of fresh oil into the engine's lube oil system. An electronic controller is provided to vary the amount of used lube oil injected into the oil system based on the severity of engine operation. The process periodically determines an engine operating severity value, i.e. fuel consumption value, for an interval of engine operation and calculates a base line quantity of oil for injection based on the current fuel consumption of the engine during the current interval. The system also includes a diagnostic process for maintaining the engine's oil sump at a proper level while monitoring various components and parameters of the system and providing an indication of any abnormal condition. The system maintains the quality of the engine lube oil at a level necessary to provide optimal engine protection at all engine operating conditions while also maintaining the oil concentration in the engine's fuel at an acceptable level.
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Black Colin I.
Carver Donald P.
Graham John P.
Hatton Ray C.
Roettgen Leslie A.
Brackett Jr. Tim L.
Cummins Engine Company, Inc.
Hairston Brian
Leedom Jr. Charles M.
Peabody LLP Nixon
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