US 11,867,099 B1
Crankcase ventilation system architecture
Rodney Allen Lawrence, Frankfort, IN (US); Brandyn A. Stack, Lafayette, IN (US); and Joshua Amiel Lehe, West Lafayette, IN (US)
Assigned to Caterpillar Inc., Peoria, IL (US)
Filed by Caterpillar Inc., Peoria, IL (US)
Filed on Jan. 3, 2023, as Appl. No. 18/092,547.
Int. Cl. F01M 13/04 (2006.01); F02B 29/04 (2006.01); F02M 25/06 (2016.01); F01M 13/00 (2006.01); B01F 25/312 (2022.01); B01D 46/00 (2022.01); B01D 46/24 (2006.01); F01M 5/00 (2006.01)
CPC F01M 13/04 (2013.01) [B01D 46/003 (2013.01); B01D 46/24 (2013.01); B01F 25/312 (2022.01); F01M 5/002 (2013.01); F01M 13/0011 (2013.01); F02B 29/0406 (2013.01); F02M 25/06 (2013.01); F01M 2013/0044 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An engine system comprising: a crankcase having a blow- by gas passing therethrough; a compressor configured to receive air and compress the air; an aftercooler in fluid communication with the compressor and configured to cool at least a portion of the air compressed by the compressor; an oil separating apparatus in fluid communication with the blow-by gas and configured to separate oil from the blow- by gas, wherein separate from the blow-by gas, the oil separating apparatus is in fluid communication with a boost air that includes the compressed air from the compressor; and a jet pump in fluid communication with both the blow-by gas after leaving the oil separating apparatus and the boost air after leaving the oil separating apparatus, wherein the jet pump is configured to combine the blow-by gas and the boost air; wherein the system is configured to supply boost air to the oil separating apparatus at a temperature range above a dew point temperature of the blow-by gas and below a temperature at which one or more components of the oil separating apparatus become inoperable; and wherein the boost air is in fluid communication with the oil separating apparatus and configured to pass through the oil separating apparatus in a heat exchange relationship with the blow-by gas to maintain a temperature of the blow-by gas within the oil separating apparatus at a desired temperature range.