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:
Jun. 12, 2012
Filed:
Nov. 06, 2007
Tomomi Onishi, Susono, JP;
Shigeki Nakayama, Susono, JP;
Teruhiko Miyake, Toyota, JP;
Masahiro Nagae, Nishikamo-gun, JP;
Hajime Shimizu, Susono, JP;
Isao Matsumoto, Suntou-gun, JP;
Tomoyuki Ono, Sunotu-gun, JP;
Hiroki Murata, Gotenba, JP;
Akira Yamashita, Susono, JP;
Hiroyuki Haga, Susono, JP;
Tomomi Onishi, Susono, JP;
Shigeki Nakayama, Susono, JP;
Teruhiko Miyake, Toyota, JP;
Masahiro Nagae, Nishikamo-gun, JP;
Hajime Shimizu, Susono, JP;
Isao Matsumoto, Suntou-gun, JP;
Tomoyuki Ono, Sunotu-gun, JP;
Hiroki Murata, Gotenba, JP;
Akira Yamashita, Susono, JP;
Hiroyuki Haga, Susono, JP;
Toyota Jidosha Kabushiki Kaisha, Aichi-ken, JP;
Abstract
An exhaust gas recirculation system includes a high-pressure EGR unit; a low-pressure EGR unit; a high-pressure EGR valve; a low-pressure EGR valve; and an EGR control unit that adjusts the opening amount of the high-pressure EGR valve to a required value for achieving the target EGR rate based on the characteristics of the exhaust gas in the low-pressure EGR passage before the operation mode is changed, and that maintains the required value during a period from when the operation mode is changed until when the low-pressure EGR gas is changed to the exhaust gas discharged from the internal combustion engine in the post-change operation mode.