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:
Apr. 07, 1992
Filed:
Apr. 19, 1991
Akira Demizu, Himeji, JP;
Hitoshi Inoue, Amagasaki, JP;
Mitsubishi Denki K.K., Tokyo, JP;
Abstract
An internal-combustion engine control device includes a pressure sensing device for sensing a cylinder pressure of the internal-combustion engine, a crank angle sensing device for sensing a crank angle, an indicated mean effective pressure computing device for computing the illustrated mean effective pressure from the output of the pressure sensing device and the output of the crank angle sensing device, an indicated device effective pressure averaging means for averaging the output of the indicated mean effective pressure computing device, a load sensing device for sensing a load of the internal-combustion engine, a speed sensing device for sensing an engine speed of the internal-combustion engine from the output of the crank angle sensing device, an operating condition judging device for judging the operating condition of the internal-combustion engine from the output of the load sensing device and the output of the speed sensing device, and a control device for controlling at least one of air-fuel ratio and an ignition timing so that the mean value of an the indicated mean effective pressure will become a maximum value, under a designated operating condition judged by the operating condition judging device. Even when engine components have variations or are subjected to a change with time or a change in environmental conditions, the engine can be operated at all times with optimum air-fuel ration and optimum ignition timing. That is, the control device insures improved output torque, low fuel consumption, improved responsiveness, and operating stability.