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:
Nov. 21, 1989
Filed:
Aug. 19, 1988
Michihiro Ohashi, Mishima, JP;
Norio Nakamura, Susono, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
An electronic control device in an internal combustion engine with an EGR apparatus for calculating a predetermined control variable such as a fuel injection time period or an ignition timing, and correcting same to exclude a component stemming from EGR gas in the intake air. The device comprises a first unit for calculating a fundamental value of the fuel injection time period (TP), a second unit for converting the detected intake pressure under the detected atmospheric pressure into a converted intake pressure under the standard atmospheric pressure in response to the detected atmospheric pressure and a third unit for calculating a correcting value (TPE) from data including information regarding the EGR gas under the standard atmospheric pressure and stored as a function of the converted intake pressure (PMT). In this device, the fundamental value can be corrected by subtracting the correcting value from the fundamental value in the case of the fuel injection time period.