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:
Nov. 11, 2008
Filed:
Mar. 23, 2005
Yoshiyuki Takahashi, Kariya, JP;
Hisanobu Suzuki, Toyota, JP;
Yoshiyuki Takahashi, Kariya, JP;
Hisanobu Suzuki, Toyota, JP;
Kabushiki Kaisha Toyota Jidoshokki, Aichi-ken, JP;
Toyota Jidosha Kabushiki Kaisha, Aichi-ken, JP;
Abstract
Catalysts are respectively provided in a plurality of parallel exhaust paths of an internal combustion engine. A flow rate adjusting section adjusts a flow rate of an exhaust gas discharged from a first exhaust path to a downstream side, and a flow rate of an exhaust gas supplied to an intake path from the first exhaust path via a first exhaust gas recirculating path. A control section controls the flow rate adjusting section in such a manner that a ratio of the flow rate of the exhaust gas discharged from the first exhaust path with respect to the flow rate of the exhaust gas discharged from the other exhaust paths than the first exhaust path becomes smaller in the case that a temperature of the catalyst exists in a preset low temperature region than in other cases. Accordingly, it is possible to achieve an early activation in at least one of a plurality of catalysts while avoiding an addition of mechanisms.