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:
Sep. 07, 1999
Filed:
Aug. 25, 1997
Jun Harada, Mishima, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
An apparatus for controlling operation of an engine is disclosed. The apparatus includes a passage for supplying air to the engine and a fuel injection valve. The engine burns air-fuel mixture to produce torque. A valve adjusts the quantity of air supplied to the engine. An ECU actuates the valve based on the driving state of the engine. The ECU feedback controls the air-fuel ratio by altering the position of the valve to prevent torque shocks caused by changes in the air supply. The feedback control employs two correction factors, the first of which is representative of the air-fuel ratio of the mixture, and the second of which is representative of an average deviation of the first factor from a stoichiometric air-fuel ratio value. The air-fuel ratio of the mixture is feedback controlled as a function of both correction factors.