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. 20, 2017
Filed:
Jul. 04, 2008
Masahiko Yabe, Hino, JP;
Haruyuki Yokota, Hino, JP;
Takaharu Shimizu, Hino, JP;
Hiroyuki Ninomiya, Hino, JP;
Shinya Sato, Hino, JP;
Takahiko Hayashi, Hino, JP;
Shunsuke Toshioka, Toyota, JP;
Satoshi Watanabe, Toyota, JP;
Tomihisa Oda, Toyota, JP;
Yutaka Tanai, Toyota, JP;
Masahiko Yabe, Hino, JP;
Haruyuki Yokota, Hino, JP;
Takaharu Shimizu, Hino, JP;
Hiroyuki Ninomiya, Hino, JP;
Shinya Sato, Hino, JP;
Takahiko Hayashi, Hino, JP;
Shunsuke Toshioka, Toyota, JP;
Satoshi Watanabe, Toyota, JP;
Tomihisa Oda, Toyota, JP;
Yutaka Tanai, Toyota, JP;
HINO MOTORS, LTD., Tokyo, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota-shi, JP;
Abstract
An exhaust emission control device including a selective reduction catalyst; urea water as reducing agent being added in the pipe upstream of the reduction catalyst depurate NOthrough reduction; an oxidation catalyst arranged in the pipe upstream of an added position of the urea water, the oxidation catalyst physically adsorbing NOin the exhaust gas at a temperature lower than a lower active limit temperature of the reduction catalyst and discharging the adsorbed NOat a temperature higher than a lower active limit temperature of the oxidation catalyst; and a fuel injection device for adding fuel into the exhaust gas upstream of the oxidation catalyst is disclosed. The start of the fuel addition by the fuel injection device is refrained until exhaust temperature on an inlet side of the reduction catalyst is increased to a preset temperature comparable with the lower active limit temperature of the oxidation catalyst.