US 12,146,428 B1
Oil make-up system with siphon mitigation
Douglas E. Davis, Lafayette, IN (US); Sudhakar Thamodharan, Zionsville, IN (US); and Erik C. Wilson, Battle Ground, IN (US)
Assigned to Caterpillar Inc., Peoria, IL (US)
Filed by Caterpillar Inc., Peoria, IL (US)
Filed on May 19, 2023, as Appl. No. 18/320,624.
Int. Cl. F01M 1/02 (2006.01); F01M 11/00 (2006.01); F01M 11/02 (2006.01)
CPC F01M 11/0004 (2013.01) [F01M 1/02 (2013.01); F01M 11/02 (2013.01); F01M 2011/0095 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An oil make-up system for an engine of a machine, the system comprising:
an oil pan for supplying oil to engine components;
an auxiliary oil tank positioned above the oil pan;
a return for conveying oil from the oil pan to the auxiliary oil tank, the return including a return pump;
a supply for conveying oil from the auxiliary oil tank to the oil pan, the supply including a supply pump; and
a siphon-terminating-connection between the supply and return that includes an orifice fluidly connecting a return chamber and a supply chamber of the auxiliary oil tank.