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:
Aug. 17, 1999
Filed:
Nov. 19, 1997
Shusuke Akazaki, Wako, JP;
Kohei Hanada, Wako, JP;
Yuji Yasui, Wako, JP;
Yoshikazu Oshima, Wako, JP;
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A deterioration of a catalytic converter for purifying an exhaust gas produced by burning a mixture of a fuel and air in an internal combustion engine, for example, is judged by supplying the exhaust gas to the catalytic converter, detecting the amount of a predetermined component of the exhaust gas which has passed through the catalytic converter with an exhaust gas sensor disposed downstream of the catalytic converter, calculating a target air-fuel ratio for the exhaust gas to be supplied to the catalytic converter for achieving a predetermined emission purifying capability of the catalytic converter based on a detected output signal from the exhaust gas sensor, and judging a deteriorated state of the catalytic converter based on the calculated target air-fuel ratio.