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. 08, 1986
Filed:
May. 01, 1985
Nobuyuki Kobayashi, Toyota, JP;
Toshimitsu Ito, Toyota, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
An engine having a swirl control valve in the intake port. When the engine is operating at a low speed, a lean air-fuel mixture is fed into the engine cylinder, and a swirl control valve is closed in order to create a swirl motion in the combustion chamber. When a predetermined time elapses after the engine operating state is changed from the low speed-light load state to the low speed-heavy load state, the vacuum chamber of an actuator actuating the swirl control valve is opened to the outside air and, thereby, the swirl control valve is forced to open to the maximum extent. At the same time, the air-fuel mixture fed into the engine cylinder is changed to an air-fuel mixture of an approximately stoichiometric air-fuel ratio from the lean air-fuel mixture.