The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 20, 2002
Filed:
Aug. 01, 2001
Joseph C. Hamelink, N. Muskegon, MI (US);
Stephen H. Hill, Muskegon, MI (US);
Dana Corporation, Toledo, OH (US);
Abstract
An engine crankcase bypass system includes a scavenging mechanism for the collection and removal of oil entrained in engine bypass gases that include unburned gasoline fuel and water vapors. The improved bypass system, designed to replace a standard PCV (positive crankcase ventilation) system, senses manifold and crankcase vacuum pressures, and via utilization of either an electronic or mechanical valve provides continuous adjustments of bypass gas flows for the maintenance of a constant gas flow sufficient to exceed normal engine bypass flow rates. A deflector system positioned in a flow stream is designed to extract and separate oil vapor from unburned gasoline fuel and water vapors entrained in the bypass gases. The oil is collected and drained to a temporary reservoir for subsequent re-entry into the oil sump of the engine. The fuel and water vapors are immediately returned to the intake manifold of the engine for reburning of the fuel.