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:
Feb. 27, 1990
Filed:
Sep. 28, 1988
Shoichi Washino, Amagasaki, JP;
Satoru Ohkubo, Amagasaki, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
An air-fuel ratio control apparatus for an internal combustion engine operates a signal of inner pressure of cylinder and a signal of crank angle position to obtain the maximum value of a rate of pressure increase in an ignition cycle or the mean value of the maximum values in a predetermined number of cycles, whereby a fuel injection quantity is controlled by using said value. An exhaust gas temperature may be used as well as the signals of the inner pressure of cylinder and the crank angle. In this case, a fuel injection quantity is controlled on the basis of a state quantity obtained by calculating the inner pressure of cylinder and a temperature of exhaust gas.