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:
Dec. 19, 1989
Filed:
Nov. 24, 1987
Kevin Cockerham, Sutton Coldfield, GB;
Simon W Packwood, Birmingham, GB;
Lucas Industries plc, Birmingham, GB;
Abstract
A knock detection system for an internal combustion engine comprises an input for receiving a signal from a vibration-sensing transducer, an amplifier to which the input is connected and a rectifying and integrating device connected to the output of the amplifier, the amplifier comprising a variable gain amplifier and feedback device being provided for controlling the gain of the variable gain amplifier in dependence upon variations in the output level of the rectifying and integrating device. The gain control which is exercised tends to maintain the integrator output level within an optimum band so as to overcome problems due to input offset voltage errors.