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:
Jul. 31, 1990
Filed:
Apr. 07, 1989
Toshio Iwata, Hyogo, JP;
Satoru Ohkubo, Hyogo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
This invention provides a controller for controlling the combustion of an internal combustion engine. The controller comprises pressure sensors for detecting the pressure in a set of cylinders. The detected pressure profile in the cylinders is used to determine the combustion parameters, based on which the drive control parameters are determined. The combustion of the engine is normally controlled with those drive control parameters while the control is performed by means of predetermined parameters in the event of no combustion occurring. In determining the combustion parameters, the controller in accordance with this invention calibrates the pressure profile detected by the pressure sensor to eliminate the modulus and the offset of the pressure sensor from the pressure profile. The modulus and the offset are renewed on a proper basis to make up for the drawback that the modulus and the offset fluctuate in response to changes in temperature.