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:
Mar. 06, 1990
Filed:
Sep. 28, 1988
Shoichi Washino, Tsukaguchihonmachi, JP;
Satoru Ohkubo, Tsukaguchihonmachi, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A fuel properties detecting aparatus for an internal combustion engine has a pressure detector to detect an inner pressure of cylinder, a crank angle detector to detect a crank angle of engine, and a control device which is adapted to receive signals from the pressure detector and the crank angle detector to thereby calculate an effective calorific value Q of fuel in an ignition cycle on the basis of an inner pressure of a cylinder P(.theta.) at a crank angle in compression and expansion strokes in an ignition cycle, a crank angle .theta. and a cylinder capacity V(.theta.), and to obtain an effective combustion rate K or a low level calorific value Hu of fuel. Fuel properties are detected by using at least one of the effective combustion rate K and the low level calorific value Hu, or a ratio of a fuel injection pulse width Ti to the low level calorific value Hu (Ti/Hu).