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:
Apr. 16, 2002
Filed:
Jun. 28, 2000
John M. Keller, Canvas, WV (US);
Other;
Abstract
A system and method for minimizing the likelihood of backfiring as a spark ignition, internal combustion engine is turned off. A fuel cut-off device stops the flow of fuel into the engine in response to an engine shut-off control signal, such as when the on-off keyswitch is moved from the “on” position to the “off” position. The ignition spark is maintained to the engine for a predetermined length of time after fuel shut-off. The delay time is selected to allow the fuel cut-off device to operate to stop the flow of fuel into the engine. In this way, for as long as the engine is turning over, the engine is provided with an electric spark for controlled ignition, thereby minimizing or eliminating backfiring.