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:
Jan. 18, 1983
Filed:
Dec. 02, 1980
Applicant:
Inventor:
Kenichi Yoshida, Yokosuka, JP;
Assignee:
Nissan Motor Company, Limited, Yokohama, JP;
Primary Examiner:
Int. Cl.
CPC ...
G01L / ;
U.S. Cl.
CPC ...
73 35 ;
Abstract
A knocking detector senses engine vibration and produces an electrical signal corresponding to such vibration. This signal is then rectified and smoothed to produce a background noise signal. When the magnitude of the background noise level signal is greater than a reference value, the amplitude of the rectified signal is limited so that the background noise level signal has a substantially constant level. This limited background noise level signal is then compared with the initial signal from the sensor, and if the initial signal from the sensor is greater in magnitude than the background noise signal, the engine is considered to be in knocking condition.