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. 02, 1986
Filed:
Jul. 24, 1984
Reinhold Blauhut, Werdohl, DE;
Atlas Fahrzeugtechnik GmbH, , DE;
Abstract
A circuit for the recognition of knocking of an Otto engine includes a spark plug in the combustion chamber of a cylinder which also serves as an ionic current probe. Both an excitation voltage generator and, an evaluation circuit for the measuring voltage are coupled to the high-voltage ignition circuit. The excitation voltage generator is provided by a high-frequency oscillator. The input coupling of the excitation voltage is effected non-galvanically. The evaluating circuit comprises an amplitude demodulator for the high-frequency oscillations. The benefits of the present invention resulting from a knock recognition circuit of such a configuration that critical electrical components and galvanic coupling are avoided.