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:
Mar. 24, 2009
Filed:
Sep. 24, 2007
Kenneth Wilson Fernald, Austin, TX (US);
Danny Joe Allred, Austin, TX (US);
Kenneth Wilson Fernald, Austin, TX (US);
Danny Joe Allred, Austin, TX (US);
Keterex, Inc., Austin, TX (US);
Abstract
An ignition timing circuit is disclosed which provides variable fuel ignition timing as a function of the rotational speed of a small internal combustion engine. A measure of the rotational speed of an engine is generated from the shape of pulses generated by a sensor. A timing delay circuit converts this measure of the rotational engine speed into a fuel ignition trigger signal with a controlled delay relative to the engine's angular position. This trigger signal activates a switching device which in turn delivers energy to the engine's spark plug system. A significant benefit of the disclosed ignition timing circuit is its ability to be enclosed in a package which is size and pin-compatible with standard silicon controlled rectifiers.