US 12,264,604 B2
Maintaining oil pressure during cylinder deactivation operation
Govindarajan Kothandaraman, Columbus, IN (US); Lyle E. Kocher, Whiteland, IN (US); David M. Barnes, Columbus, IN (US); Scott Robert Bardakjy, Columbus, IN (US); and J. Steven Kolhouse, Columbus, IN (US)
Assigned to Cummins Inc., Columbus, IN (US)
Filed by Cummins Inc., Columbus, IN (US)
Filed on Aug. 9, 2022, as Appl. No. 17/884,546.
Application 17/884,546 is a continuation of application No. PCT/US2021/016777, filed on Feb. 5, 2021.
Claims priority of provisional application 62/979,690, filed on Feb. 21, 2020.
Prior Publication US 2022/0381166 A1, Dec. 1, 2022
Int. Cl. F01L 13/00 (2006.01); B01D 35/00 (2006.01); F01M 1/02 (2006.01); F01M 1/10 (2006.01); F01M 1/16 (2006.01); F01M 5/00 (2006.01); F01P 3/06 (2006.01); F01P 3/00 (2006.01)
CPC F01L 13/0005 (2013.01) [B01D 35/005 (2013.01); F01M 1/02 (2013.01); F01M 1/10 (2013.01); F01M 1/16 (2013.01); F01M 5/002 (2013.01); F01P 3/06 (2013.01); F01L 2013/001 (2013.01); F01M 2001/0215 (2013.01); F01M 2001/0261 (2013.01); F01P 2003/006 (2013.01)] 24 Claims
OG exemplary drawing
 
1. An oil lube system for an internal combustion engine, comprising:
an oil pump fluidly connected to an oil source, wherein the oil pump is operable to output a flow of oil under pressure;
a cylinder block fluidly connected to the oil pump to receive a first part of the flow of oil;
a cylinder head fluidly connected to the oil pump to receive a second part of the flow of oil, wherein the second part of the flow of oil bypasses the cylinder block to flow directly to the cylinder head; and
a valvetrain fluidly connected to receive a portion of the second part of the flow of oil from the cylinder head, wherein the valvetrain is configured to deactivate or skipfire one or more cylinders of the cylinder block.