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. 20, 1990
Filed:
Mar. 09, 1990
Shoichi Washino, Hyogo, JP;
Satoru Ohkubo, Hyogo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A fuel control apparatus for an internal combustion engine comprises a pressure sensor for detecting the pressure in a combination chamber and a crank angle sensor for detecting a crank angle. During compression stroke, a microcomputer calculates the difference in pressure in the combustion chamber between two crank angles, or differentiates the pressure in the combustion chamber with respect to the crank angle at an arbitrary crank angle. Then, the microcomputer normalizes the pressure difference between the two crank angles by the pressure difference between the two crank angles when the engine is in an arbitrary reference condition, for example, its start condition, or normalizes the differentiated pressure at the arbitrary crank angle by the differentiated pressure at the arbitrary crank angle when the engine is in the arbitrary reference condition, for example, its start condition. The microcomputer then calculates the product of an amount of charged air and the pressure difference or the pressure differentiated which has been normalized, thereby producing a basic fuel injection.