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:
May. 20, 2003
Filed:
Oct. 02, 2001
Hiroyuki Kameda, Nagoya, JP;
Yoshihiro Matsubara, Nagoya, JP;
NGK Spark Plug Co., Ltd., Nagoya, JP;
Abstract
In the ignition apparatus for internal combustion engine according to the invention, during a period when spark discharge voltage is detected by a waveform detecting unit and an ignition coil supplies the spark discharge voltage by use of ignition detection ignition in each of cylinders is detected in accordance with discharged voltage by the waveform detecting unit When the ignition detection detects the ignition by use of, for example, an ignition control unit during a discharging period of supplying the spark discharge voltage having detected the ignition, the supply of the spark discharge voltage is stopped. Thereby, since the supply of the spark discharge voltage is stopped after having detected the ignition, it is possible to avoid the surplus supply of spark energy to the spark plug after having fired.