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. 27, 1993
Filed:
Apr. 07, 1992
Applicant:
Inventors:
Yasunori Iwakiri, Kanagawa, JP;
Yoshihisa Sugimoto, Shizuoka, JP;
Assignee:
Nissan Motor Company, Limited, Yokohama, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F02P / ; F02P / ; F02P / ;
U.S. Cl.
CPC ...
36443108 ; 123406 ; 123425 ; 73116 ;
Abstract
A knock detecting system for internal combustion engines which includes a heat quantity computing unit for deriving a heat quantity produced in every engine cycle, on the basis of the fluctuations in a combustion pressure waveform in which high-frequency components having frequencies higher than a predetermined cut-off frequency being removed from a fluctuation waveform of detected combustion pressure. The knock detecting system also includes a knock intensity computing units which derives knock intensity on the basis of a ratio of a heat quantity produced by knocking to a heat quantity produced by normal combustion.