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:
Jul. 25, 2006
Filed:
Jan. 16, 2004
Applicants:
Kozo Katogi, Hitachi, JP;
Masami Nagano, Hitachinaka, JP;
Hiroshi Sekine, Hitachinaka, JP;
Hiroyuki Takamura, Hitachinaka, JP;
Shinji Nakagawa, Hitachinaka, JP;
Inventors:
Kozo Katogi, Hitachi, JP;
Masami Nagano, Hitachinaka, JP;
Hiroshi Sekine, Hitachinaka, JP;
Hiroyuki Takamura, Hitachinaka, JP;
Shinji Nakagawa, Hitachinaka, JP;
Assignees:
Hitachi, Ltd., Tokyo, JP;
Hitachi Car Engineering Co., Ltd., Hitachinaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01N 3/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
In order to improve the decrease of the catalytic action and the deterioration of the exhaust purification performance, a catalyst installed in the exhaust pipe of an engine and a secondary air pump for supplying secondary air into the exhaust pipe are provided, and the secondary air pump is operated even after the engine has stopped.