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:
Dec. 19, 1989
Filed:
Apr. 20, 1988
Hitachi, Ltd., Tokyo, JP;
Abstract
An internal combustion engine control apparatus has a digital arithmetic unit to which signals are inputted from a plurality of detectors such as detectors for detecting an operational state of the engine and air fuel ratio detector and controls a fuel air ratio and ignition timing according to output signals from the arithmetic unit. The apparatus comprises by a misfire detector for detecting a misfiring state of the engine, NOx concentration detector and a controller for controlling the fuel air ratio and the ignition timing so as to fall within a tolerable stable combustion range defined by a detected misfire boundary and a detected NOx limit. The misfiring state and/or NOx concentration can be detected through detection of temperature change in the combustion chamber by a detector. The detector comprises a black body disposed in the combustion chamber and a fused silica cable mounting the black body.