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. 21, 2009
Filed:
May. 13, 2005
Mitsuhiro Tabata, Suntou-gun, JP;
Kenji Kataoka, Susono, JP;
Makoto Nakamura, Okazaki, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
The present invention is directed to a start-up control apparatus for an internal combustion engine that can further improve the start-up characteristics of an internal combustion engine. An ECU is provided that corrects a position at which the crankshaft stops or a position at which the crankshaft is predicted to stop based on a rotation state of the crankshaft immediately before stopping; switches an actuation timing of the fuel injection valve of the stopped intake-stroke cylinder, which is predicted to be in a intake stroke based on a position at which the crankshaft stops, based on the position at which the crankshaft is predicted to stop; during engine start-up, switches an ignition timing that actuates the spark plugs based on the position at which the crankshaft stops; predicts the amount of air that is drawn into a cylinder during a predetermined interval after engine start-up, based on the engine speed, the position at which the crankshaft stops, volume in a intake passage, and the number of times that the intake stroke has been carried out; and calculates the fuel injection amount for the cylinder based on the predicted amount of air.