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. 22, 2014
Filed:
Jun. 06, 2008
Shigeki Nakayama, Susono, JP;
Akio Matsunaga, Aichi-ken, JP;
Tomomi Onishi, Susono, JP;
Akiyuki Iemura, Susono, JP;
Shigeki Nakayama, Susono, JP;
Akio Matsunaga, Aichi-ken, JP;
Tomomi Onishi, Susono, JP;
Akiyuki Iemura, Susono, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;
Abstract
An exhaust gas recirculation device of an internal combustion engine () including a low-pressure EGR passage (), a high-pressure EGR passage (), a low-pressure EGR valve () and a high-pressure EGR valve () further includes an air-fuel ratio sensor () that is disposed in the exhaust passage () upstream of the position of its connection with the low-pressure EGR passage (). In the case where a predetermined fuel-cut condition is satisfied, an ECU () estimates the flow amounts of exhaust gas flowing in the low-pressure EGR passage () and the high-pressure EGR passage (), on the basis of the oxygen concentrations acquired by the air-fuel ratio sensor () at timings at which the exhaust gases recirculated into the intake passage () via the low-pressure EGR passage () and via the high-pressure EGR passage () reach the air-fuel ratio sensor (), respectively.