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:
Sep. 22, 1998
Filed:
Jun. 28, 1996
Applicant:
Inventors:
Hirohiko Yamada, Anjo, JP;
Hideki Yukumoto, Kariya, JP;
Assignee:
Nippondenso Co., Ltd., Kariya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01M / ; F02P / ;
U.S. Cl.
CPC ...
73116 ; 73 3503 ; 73 3506 ; 73 3509 ; 36443108 ; 340439 ;
Abstract
To ensure both responsiveness and stability of a knock determination in which a knock sensor signal is compared with a knock determining reference computed from a background value, a difference between the knock sensor signal and the background value is determined through averaging by the use of the averaging coefficient. Based on the difference, the averaging coefficient n is varied so that the more latest sensor output signals are used in the background value determination as the difference becomes larger.