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. 07, 2012
Filed:
Jul. 12, 2007
Masahiro Nagae, Nishikamo-gun, JP;
Masahiro Nagae, Nishikamo-gun, JP;
Toyota Jidosha Kabushiki Kaisha, Aichi-ken, JP;
Abstract
An object of the present invention is to provide a technology of preventing, in an exhaust gas recirculation system having a low pressure EGR passage that recirculates a part of the exhaust gas from the exhaust passage at some point downstream of the exhaust gas purification apparatus to the intake passage, fragments of the exhaust gas purification apparatus from entering the intake system through the low pressure EGR passage in case that breakage of the exhaust gas purification apparatus occurs. The inventive system has a low pressure EGR valve provided in the low pressure EGR passage, an EGR control unit (S-S) for recirculating exhaust gas to the intake passage by opening the low pressure EGR valve, and a breakage detection unit (S-S) for detecting breakage of the exhaust gas purification apparatus. When breakage of the exhaust gas purification apparatus is detected, the low pressure EGR valve is closed (S).