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:
Aug. 03, 1999
Filed:
Dec. 11, 1997
Applicant:
Inventors:
Daiji Isobe, Toyohashi, JP;
Shigenori Isomura, Kariya, JP;
Assignee:
Denso Corporation, Kariya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02M / ;
U.S. Cl.
CPC ...
123399 ; 123492 ;
Abstract
Intake pressure is estimated for an engine load using an averaged accelerator depression position derived by smoothing sensed changes in accelerator depression position. Throttle valve opening angle is controlled based on the thus estimated intake pressure. A corresponding fuel injection value is calculated and supplied to the engine thus matching the estimated air and fuel amounts. Thus, deviation of the air-fuel mixture from a stoichiometric ratio can be reduced even with rapid and complicated accelerator operations.