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:
May. 12, 1987
Filed:
Apr. 14, 1986
Larry L Nix, Kokomo, IN (US);
Michael G McDermott, Kokomo, IN (US);
General Motors Corporation, Detroit, MI (US);
Abstract
An adaptive knock control for a spark ignited, internal combustion engine is disclosed in which a signal indicating sensed knock induced and other bursts of engine vibrations is passed through a bandpass filter effective to tune the apparatus to a characteristic knock frequency which is variable with engine speed. The filter tuned frequency may be varied directly with engine speed to follow the characteristic knock frequency. Additionally or alternatively, it may be varied, at a particular engine speed, in a first direction away from the knock frequency avoid a strong engine noise component in the opposite direction from the knock frequency.