US 11,988,119 B1
Internal combustion engine with ventilation system for crankcase dilution
Lucas K. Smith, Lafayette, IN (US); and Rodney Allen Lawrence, Frankfort, IN (US)
Assigned to Caterpillar Inc., Peoria, IL (US)
Filed by Caterpillar Inc., Peoria, IL (US)
Filed on May 22, 2023, as Appl. No. 18/200,328.
Int. Cl. F01M 13/02 (2006.01); F01M 13/00 (2006.01)
CPC F01M 13/028 (2013.01) [F01M 2013/0038 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An internal combustion engine comprising:
an engine block defining a combustion chamber and a crankcase in fluid communication with the combustion chamber;
an auxiliary device in fluid communication with the crankcase of the engine block, wherein the auxiliary device is driven by the internal combustion engine to supply air to the crankcase of the engine block at a desired pressure range and a desired mass flow rate range to ventilate the crankcase, wherein the auxiliary device includes a gear or wheel that is driven by a boost air from the internal combustion engine.