US 12,326,161 B1
Warm-up oil management strategy
Michael A Holland, Conrad, IA (US); Clayton P. Neumann, Cedar Falls, IA (US); and Greg R. Long, Clay City, IN (US)
Assigned to Deere & Company, Moline, IL (US)
Filed by Deere & Company, Moline, IL (US)
Filed on Dec. 8, 2023, as Appl. No. 18/533,430.
Int. Cl. F15B 21/0427 (2019.01); F16H 57/04 (2010.01); F16H 61/00 (2006.01); F16N 7/38 (2006.01); F16N 39/04 (2006.01); B60R 16/08 (2006.01); B60R 17/02 (2006.01)
CPC F15B 21/0427 (2019.01) [F16H 57/0402 (2013.01); F16H 57/0412 (2013.01); F16H 57/0413 (2013.01); F16H 61/0021 (2013.01); F16N 7/38 (2013.01); F16N 39/04 (2013.01); B60R 16/08 (2013.01); B60R 17/02 (2013.01); F15B 2211/611 (2013.01); F15B 2211/62 (2013.01); F16H 2061/0037 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A work vehicle, comprising:
first and second vehicle drivetrain components;
a main hydraulic fluid reservoir;
a conditioning hydraulic fluid reservoir;
a variable flow conditioning hydraulic fluid source configured to intake conditioning hydraulic fluid from the conditioning hydraulic fluid reservoir and provide the conditioning hydraulic fluid under pressure to a conditioning hydraulic fluid discharge line;
a control manifold including first and second control valves configured to control flow of the conditioning hydraulic fluid from the conditioning hydraulic fluid discharge line to the first and second drivetrain components, respectively, to lubricate and cool the first and second drivetrain components;
a filter disposed in the conditioning hydraulic fluid discharge line;
a filter bypass configured to flow the conditioning hydraulic fluid through the conditioning hydraulic fluid discharge line without passing the conditioning hydraulic fluid through the filter when a pressure differential across the filter exceeds a set pressure differential value;
a low pressure relief valve configured to communicate the conditioning hydraulic fluid discharge line with the main hydraulic fluid reservoir;
a high pressure relief valve configured to communicate the conditioning hydraulic fluid discharge line with the conditioning hydraulic fluid reservoir; and
a recirculation valve configured to selectively block flow through the low pressure relief valve and thereby cause flow from the conditioning hydraulic fluid discharge line to flow through the high pressure relief valve to the conditioning hydraulic fluid reservoir.