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:
Oct. 11, 1994
Filed:
Jan. 15, 1993
Naoki Tomisawa, Isesaki, JP;
Japan Electronic Control Systems Co., Ltd., Isesaki, JP;
Abstract
Based on a combustion pressure detected by a cylinder internal pressure sensor, a mean effective pressure Pi is calculated and a fluctuation amount .DELTA.Pi of the mean effective pressure Pi is calculated. The level of a predetermined frequency component of the fluctuation amount .DELTA.Pi is compared with a predetermined level. When the fluctuation amount .DELTA.Pi exceeds the predetermined value, it is judged that an increasing correction coefficient KTW according to a water temperature is smaller than a required value corresponding to a used fuel, and the increasing correction coefficient KTW is increasingly modified. When the above fluctuation amount .DELTA.Pi is less than the predetermined value, it is judged that the increasing correction coefficient KTW is larger than the required value corresponding to the used fuel, and the increasing correction coefficient KTW is decreasingly modified. Therefore, the increasing correction coefficient KTW according to the water temperature is optimized corresponding to the fuel being used.