Internal-combustion engines – Lubricators – Crankcase – pressure control
Patent
1996-11-14
1997-11-04
Solis, Erick R.
Internal-combustion engines
Lubricators
Crankcase, pressure control
184 15, F01M 1104
Patent
active
056828519
ABSTRACT:
An oil system for an engine includes an lubricating oil circulation system having a pan reservoir connected to an inlet of an engine oil gallery by a circulation conduit. A circulation pump is positioned in the circulation conduit. A recirculation conduit connects an outlet from the engine oil gallery to the pan reservoir to complete the lubricating oil circuit. A hydraulically actuated subsystem has a supply conduit connecting the engine lubricating oil circulation system to at least one hydraulically actuated device, such as a hydraulically actuated fuel injector. A high pressure pump is positioned in the supply conduit. A drain conduit connects the at least one hydraulically actuated device to the pan reservoir. A first external port and valve are attached to and open into the supply conduit of the subsystem. An auxiliary pump is connected to the external port. The auxiliary pump can be used to either remove waste oil from the subsystem or to add fresh oil to prime the subsystem in preparation for starting the engine after an oil change.
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Breen Gerald D.
Holtman Richard H.
Stockner Alan R.
Caterpillar Inc.
Solis Erick R.
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