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. 11, 1997
Filed:
Jan. 12, 1995
Applicant:
Inventors:
Masami Kojima, Chiryu, JP;
Naohito Kato, Kariya, JP;
Assignee:
Nippondenso Co., Ltd., Kariya, JP;
Primary Examiner:
Int. Cl.
CPC ...
F02P / ;
U.S. Cl.
CPC ...
123634 ; 123652 ;
Abstract
An ignition system for an internal combustion engine is provided which includes an ignition coil formed with a primary winding and a secondary winding and a switching element for interrupting a current flow through the primary winding of the ignition coil at given timing. The ignition coil has a secondary winding to primary winding turns ratio a which meets the condition of V.sub.D .multidot.a >V.sub.r where V.sub.r is a required voltage of a spark plug of the engine and V.sub.D is a breakdown voltage of the switching element which is greater than or equal to 450 V.