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:
Dec. 19, 2000
Filed:
Oct. 29, 1998
Abstract
A recirculating exhaust gas cooling device is provided for cooling exhaust gas of a vehicle engine while the exhaust gas is recirculating through an EGR system designed to lower NOx emission levels. The cooling device includes a housing in which an exhaust gas recirculation passage and a cooling fluid passages are located next to each other, to extend in parallel with each other, and a heat-exchange core member rotatably provided in the housing and defining a multiplicity of passages that extend in substantially parallel with a rotational axis of the core member, and a rotating mechanism that rotates the core member. The multiple passages of the core member communicate with both of the exhaust gas recirculation passage and the cooling fluid passage. With the core member being rotated, EGR gas passing through the exhaust gas recirculation passage is cooled by a part of the passages of the core member that has been cooled by a cooling fluid passing through the cooling fluid passage.