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:
May. 18, 1999
Filed:
Jan. 30, 1998
Kousaku Shimada, Hitachinaka, JP;
Kouji Hosokawa, Higashimurayama, JP;
Takeshi Atago, Hitachinaka, JP;
Hitachi, Ltd., , JP;
Abstract
A cylinder fuel injection engine controller for controlling a cylinder fuel injection engine is capable of controlling the cylinder fuel injection engine for operation at a stable idling speed regardless of the variation of engine speed and load on the cylinder fuel injection engine while the cylinder fuel injection engine is cold and stratified combustion is impossible. The cylinder fuel injection engine controller comprises: a basic fuel injection quantity determining means for determining a basic fuel injection quantity (Tp1), a reference fuel injection quantity determining means for determining a reference fuel injection quantity (Tp2) from an engine speed and an accelerator pedal position; and a target fuel injection quantity calculating means for determining a target fuel injection quantity (Tp3) by multiplying the reference fuel injection quantity (Tp2) by a desired A/F ratio and dividing the product of the multiplication by the stoichiometric A/F ratio. The cylinder fuel injection engine controller is characterized by a reference fuel injection quantity adjusting means for adjusting the reference fuel injection quantity (Tp2) for engine speed control and/or load correction during idling operation. Fuel injection quantity (Tp) to be supplied to the engine and intake air quantity (Q) are controlled simultaneously and separately on the basis of the reference fuel injection quantity (Tp2).