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:
Feb. 27, 1990
Filed:
Mar. 13, 1989
Dwayne A Huntzinger, Pendleton, IN (US);
Thomas E Welsh, Jr, Anderson, IN (US);
James A Boyer, Anderson, IN (US);
General Motors Corporation, Detroit, MI (US);
Abstract
Ignition apparatus for developing and applying sparks to the cylinders of an internal combustion engine. A plurality of a secondary spark developing units are respectively associated with the cylinders of the engine. Each secondary unit comprises a spark plug and a secondary winding carried by the spark plug that is connected to the electrodes of the spark plug. Magnetic flux is coupled to the secondary winding of the secondary units by a primary winding module. The module has a support portion and a plurality of spaced tubular members. A primary coil having a bore is located in each tubular member. A tubular flux carrying part formed of magnetic material is located about each primary coil. The module is supported by the engine in such a position that portions of the secondary units project into the bores when the module is mounted on an engine.