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:
Apr. 17, 2001
Filed:
Jun. 09, 1999
Matthew J. Alger, Peoria, IL (US);
Brett M. Bailey, Peoria, IL (US);
Gerald N. Coleman, Peoria, IL (US);
Todd A. Davis, Peoria, IL (US);
Dennis D. Feucht, Morton, IL (US);
Keith E. Lawrence, Peoria, IL (US);
Cho Y. Liang, Peoria, IL (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
An exhaust gas recirculation (EGR) system for a turbo-charged internal combustion engine is provided. The EGR system includes a recirculation conduit for recirculating a volume of exhaust gas from the exhaust manifold to the intake manifold; a cooling air conduit for transporting a flow of cooling air; and a gas-to-air heat exchanger disposed in operative association with the recirculation conduit and the cooling air conduit and adapted for cooling the volume of recirculated exhaust gas in the recirculation conduit. The cooling air passing through the gas-to air heat exchanger can be diverted from the pressurized intake air, cooled (ATAAC) air, or even fresh ambient air obtained from a source external to said engine and which optionally may be forcibly directed through the heat exchanger via a blower. The disclosed embodiments disclose EGR systems where the exhaust gases are driven from the exhaust manifold to the intake manifold through different techniques including peak clipping EGR systems, venturi based EGR systems, pumped EGR systems or piston pumped EGR systems.