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.:

US 6968677 B1

PDF
Full Text
Expired
Date of Patent:
Nov. 29, 2005

Filed:

Mar. 14, 2003
Applicant:

Yasuki Tamura, Nisshin, JP;

Inventor:

Yasuki Tamura, Nisshin, JP;

Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01N003/00 ;
U.S. Cl.
CPC ...
Abstract

There is provided an exhaust emission control apparatus for an internal combustion engine, which includes a failure diagnostic device that fixes three parameters selected from the group consisting of the engine speed detected by an engine speed detecting device, the fuel quantity controlled by a fuel quantity control device, the ignition timing controlled by an ignition timing control device, and the intake air volume controlled by an intake air control device at respective predetermined values, and finds values of the remaining one parameter, and compares the values of the remaining one parameter with each other to determine whether an exhaust flow control apparatus has failed or not.


Find Patent Forward Citations

Tamura, Yasuki. (2005). Exhaust emission control apparatus for internal combustion engine (U.S. Patent No. 6968677). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/6968677

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