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. 12, 1989
Filed:
Aug. 14, 1987
Applicant:
Inventors:
Assignee:
Nippondenso Co., Ltd., Kariya, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F02D / ;
U.S. Cl.
CPC ...
36443105 ; 36443104 ; 123435 ; 123407 ;
Abstract
A control system and method for an internal combustion engine in which an intake air pressure sensor of semiconductor or strain gauge type arranged in an intake manifold is used to detect the intake air pressure at a timing at or after bottom dead center during the intake stroke, the timing being detected by detection of a predetermined crank angle at or after bottom dead center or the zero of intake air flow rate. Operating conditions of the internal combustion engine are controlled early by an air pressure detection signal. For example, the air-fuel ratio of the mixture gas before combustion is estimated to control the ignition timing.