US 11,719,139 B2
Reduced parasitic lube system
Nathaniel P. Hassall, Hebei (CN); John Jerl Purcell, III, Louisa, VA (US); Stephen D. Cofer, Jr., Sugar Grove, PA (US); David M. Barnes, Columbus, IN (US); Aaron S. Quinton, Columbus, IN (US); and Reid M. Irish, Stockton, NY (US)
Assigned to CUMMINS INC., Columbus, IN (US)
Appl. No. 16/346,403
Filed by Cummins Inc., Columbus, IN (US)
PCT Filed Oct. 31, 2017, PCT No. PCT/US2017/059298
§ 371(c)(1), (2) Date Apr. 30, 2019,
PCT Pub. No. WO2018/081800, PCT Pub. Date May 3, 2018.
Claims priority of provisional application 62/414,997, filed on Oct. 31, 2016.
Prior Publication US 2019/0271241 A1, Sep. 5, 2019
Int. Cl. F01M 1/02 (2006.01); F01M 1/08 (2006.01); F01M 1/10 (2006.01); F01M 5/00 (2006.01); F01M 11/00 (2006.01); F01M 1/00 (2006.01); F01M 11/02 (2006.01)
CPC F01M 1/02 (2013.01) [F01M 1/00 (2013.01); F01M 1/08 (2013.01); F01M 1/10 (2013.01); F01M 5/002 (2013.01); F01M 11/0004 (2013.01); F01M 2001/1007 (2013.01); F01M 2011/026 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A lubrication system, comprising:
a pump having an outlet and an inlet in fluid communication with a lubricant source, the pump not in fluid communication with a bypass;
a cooler having an outlet and an inlet in fluid communication with the outlet of the pump;
a lubrication filter having an outlet and an inlet in fluid communication with the outlet of the cooler to receive cooled lubricant from the outlet of the cooler;
a first delivery path in fluid communication with the outlet of the lubrication filter, the first delivery path being configured to deliver cooled, filtered lubricant to a bearing system of an engine, the first delivery path including the cooler and the lubrication filter disposed downstream of the cooler, the cooler receiving uncooled, unfiltered lubricant from the pump and ejecting cooled, unfiltered lubricant, the lubrication filter receiving cooled, unfiltered lubricant from the cooler and ejecting cooled, filtered lubricant; and
a second delivery path including the pump, a screen, and piston cooling nozzles of the engine, the second delivery path configured to deliver uncooled lubricant directly from the outlet of the pump into the screen and directly from the screen to the piston cooling nozzles;
wherein the pump draws an amount of lubricant from the lubrication source, the amount of lubricant being split between the first delivery path and the second delivery path, the cooled, filtered lubricant delivered to the bearing system of the engine constitutes a portion of the amount of lubricant drawn from the lubrication source, and a remaining portion of the amount of lubricant being delivered to the piston cooling nozzles.