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:
Dec. 27, 2005
Filed:
Feb. 09, 2005
Motoki Ohtani, Toyota, JP;
Motoki Ohtani, Toyota, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
A fuel injection device for an engine includes a direct injector and an intake passage injector. When the engine load is relatively low, a fuel pressure lowering procedure is executed for lowering the pressure of fuel supplied to the direct injector. An ECU sets a fuel injection ratio, which is the ratio between the fuel injection amount of the direct injector and that of the intake passage injector, based on the engine operation state. The ECU changes the fuel injection ratio such that the ratio of the fuel injection amount of the direct injector to the total amount of the fuel fed to a combustion chamber is decreased, until the pressure of the fuel supplied to the direct injector is raised from the value lowered through the fuel pressure lowering procedure to a predetermined permissible value. This effectively suppresses hampering of the engine combustion, caused by the lowered fuel pressure.