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:
Nov. 13, 1990
Filed:
Jul. 12, 1988
Toshimi Abo, Kanagawa, JP;
Nissan Motor Company, Limited, Yokohama, JP;
Abstract
An apparatus for detecting a crankshaft angular position .theta..sub.pmax at which the cylinder pressure reaches its maximum level. The apparatus samples a cylinder pressure indication signal at a predetermined target crankshaft angular position and at crankshaft angular positions advanced and retarded by a predetermined number of degrees of crankshaft rotation so as to accumulate three sets of data. The sampled three sets of data are used to determine a binominal equation defining the cylinder pressure as a function of crankshaft angular position. The apparatus calculates a maximum cylinder pressure value and a corresponding crankshaft angular position .theta..sub.pmax from the determined binominal equation.