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:
Sep. 22, 2015
Filed:
Nov. 21, 2012
Kabushiki Kaisha Toyota Jidoshokki, Kariya-shi, Aichi-ken, JP;
Shunsuke Toshioka, Susono, JP;
Koichiro Fukuda, Numazu, JP;
Shigeki Nakayama, Gotenba, JP;
Noriyoshi Takahashi, Kariya, JP;
Atsushi Kidokoro, Kariya, JP;
Sakutaro Hoshi, Kariya, JP;
Satoshi Watanabe, Kariya, JP;
KABUSHIKI KAISHA TOYOTA JIDOSHOKKI, Aichi-ken, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Aichi-ken, JP;
Abstract
An exhaust gas purification device for an internal combustion engine purifies exhaust gas in a first exhaust path and a second exhaust path. The device includes a confluent path. The confluent path extends from a confluent section of the first exhaust path and the second exhaust path. A first auxiliary NOx catalyst is provided in the first exhaust path. A second auxiliary NOx catalyst is provided in the second exhaust path. A main NOx catalyst is provided in the confluent path. A first addition section adds an ammonia source in a first addition amount to a section upstream of the first auxiliary NOx catalyst to supply urea water to the first auxiliary NOx catalyst. A second addition section adds an ammonia source in a second addition amount to a section upstream of the second auxiliary NOx catalyst to supply urea water to the second auxiliary NOx catalyst.