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. 24, 2004
Filed:
May. 02, 2002
Shinya Fujimoto, Hyogo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
The abnormality diagnosis apparatus includes an oxygen sensor for detecting a concentration of oxygen in exhaust gases of an internal combustion engine, an injector for injecting fuel into the internal combustion engine, a feedback control element for driving the injector according to the concentration of oxygen to control an amount of fuel supplied to the internal combustion engine in a feedback manner, a forced fuel correction element for correcting an amount of fuel controlled by the feedback control element in a forced manner, and an abnormality determination element for determining the presence or absence of abnormality in the injector. The abnormality determination element determines the presence or absence of abnormality in the injector based on the concentration of oxygen detected by the oxygen sensor in the course of a forced fuel correction control operation carried out by the forced fuel correction element.