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:
Jun. 07, 1988
Filed:
Jun. 22, 1987
Julian A LoRusso, Woodhaven, MI (US);
Harry A Cikanek, Northville, MI (US);
Richard W Anderson, Ann Arbor, MI (US);
Ford Motor Company, Dearborn, MI (US);
Abstract
An ignition system providing both spark ignition and a hot surface for surface ignition of a stratified fuel charge. The ignition system includes a novel hot surface spark plug designed to maximize heat retention in the center electrode and surrounding insulator for enabling surface ignition over a portion of the operating cycle of the engine. Ignition power is applied only when the center electrode temperature is below a threshold temperature. When the center electrode temperature is above a threshold temperature, ignition power is applied in inverse relation to the center electrode temperature.