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:
Feb. 22, 2005
Filed:
Oct. 28, 2002
Takumi Suzawa, Okazaki, JP;
Masakazu Tanaka, Okazaki, JP;
Kazuhiko Koike, Okazaki, JP;
Miho Ito, Hoi-gun, JP;
Takumi Suzawa, Okazaki, JP;
Masakazu Tanaka, Okazaki, JP;
Kazuhiko Koike, Okazaki, JP;
Miho Ito, Hoi-gun, JP;
Denso Corporation, Kariya, JP;
Abstract
This invention aims at achieving early activation by use of a catalytic body having a low thermal capacity, and a low pressure loss, without using a coating layer to reduce exhaust emission. The invention is directed also to improve exhaust purification performance by improving the combination of catalytic bodies and performance of each catalytic body. In the invention, a start catalystis arranged at an upstream portion of an exhaust pipe P of a car engine E and a three way catalystis disposed on the downstream side. The start catalystcan directly support catalytic components through chemical bonds by incorporating replacing elements into a substrate ceramic having high heat resistance such as cordierite. Because a coating layer is not necessary, the catalyst of the invention has a low heat capacity and a large open area and achieves reduction of exhaust emission, and reduction of a pressure loss, through early activation.