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. 16, 1985
Filed:
Apr. 13, 1984
Masami Ogata, Toyota, JP;
Toshiaki Mizuno, Nagoya, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Nippondenso Co., Ltd., Kariya, JP;
Abstract
The air-fuel ratio of an air-fuel mixture to be supplied to a combustion chamber is controlled in accordance with a feedback control mode or a lean control mode. In the feedback control mode, the air-fuel ratio is feedback-controlled to be maintained around the stoichiometric air-fuel ratio. In the lean control mode, the air-fuel ratio is controlled to be maintained at a leaner side of the stoichiometric air-fuel ratio. Ignition plugs are ignited at a first ignition timing which is comparatively advanced in the lean control mode and at a second ignition timing which is behind the first ignition timing in the feedback control mode. The ignition plugs are ignited at the second ignition timing for a predetermined period of time after switching from the lean control mode to the feedback control mode and at the first ignition timing for a predetermined period of time after switching from the feedback control mode to the lean control mode.