Internal-combustion engines – Lubricators – Crankcase – pressure control
Patent
1998-02-19
1999-04-20
Kamen, Noah P.
Internal-combustion engines
Lubricators
Crankcase, pressure control
123196R, 184 64, 417217, F01M 100
Patent
active
058948252
ABSTRACT:
The present invention relates to a supplementary lubrication system for an internal combustion engine operable to lubricate the engine and an accessory prior to engine start-up and to lubricate the accessory after engine shut-down. The supplementary lubrication system includes an oil source in fluid communication with a supplemental oil supply conduit, which branches to define two parallel conduits, a prelube branch and a postlube branch. Disposed within the prelube branch is a prelube one-way check valve and disposed within the postlube branch is a postlube one-way check valve. The prelube branch is in fluid communication with a first end of a two-directional pump and the postlube branch is in fluid communication with a second end of the two-directional pump. During prelubrication the two-directional pump operates in a first direction to draw oil through the prelube branch and to pump oil through a prelube conduit extending from the second end of the two-directional pump, to deliver oil to the engine and the accessory. During postlubrication the two-directional pump operates in a second direction to draw oil through the postlube branch and to pump oil through a postlube conduit extending from the first end of the two-directional pump to deliver oil to the accessory.
REFERENCES:
patent: 4628877 (1986-12-01), Sundles et al.
patent: 5372219 (1994-12-01), Peralta
Barr Jr. Karl F.
Benton Jason A.
General Motors Corporation
Kamen Noah P.
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