SYSTEMS AND METHODS FOR CLOSED CRANKCASE VENTILATION AND AIR FILTRATION

摘要

A system for providing air to an internal combustion engine comprises a crankcase ventilation unit that receives unrefined blowby gas from a crankcase, separates oil from the unrefined blowby gas, and discharges refined blowby gas. A conduit delivers the refined blowby gas to an air cleaner housing. The air cleaner housing comprises a first chamber that receives intake air through a first port, a second chamber that receives intake air from the first chamber and refined blowby gas from the conduit through a second port, and a third chamber that receives a mixture of intake air and refined blowby gas from the second chamber and discharges the mixture through a third port. A primary filter element filters the intake air as it passes from the first chamber to the second chamber. A secondary filter element filters the mixture as it passes from the second chamber to the third chamber.

主权项

1. A system for providing combustion air to an internal combustion engine, the system comprising:
a crankcase ventilation unit that receives unrefined blowby gas from a crankcase of the internal combustion engine, that separates oil from the unrefined blowby gas with an air-oil separator, and that discharges refined blowby gas; an air cleaner housing having a flowpath therethrough from upstream to downstream; and a conduit that connects the crankcase ventilation unit to the air cleaner housing so as to deliver the refined blowby gas to the air cleaner housing, thereby forming a closed crankcase ventilation system; wherein the air cleaner housing comprises:
a first chamber that receives intake air through a first port;a second chamber downstream of the first chamber that receives intake air from the first chamber and that receives refined blowby gas from the conduit through a second port;a third chamber downstream of the second chamber that receives a mixture of intake air and refined blowby as from the second chamber and that discharges the mixture through a third port;a primary filter element that filters the intake air as it passes from the first chamber to the second chamber; anda secondary filter element that filters the mixture as it passes from the second chamber to the third chamber.