Internal-combustion engines – High tension ignition system – Radio interference protection
Reexamination Certificate
2006-12-26
2006-12-26
Solis, Erick R (Department: 3747)
Internal-combustion engines
High tension ignition system
Radio interference protection
C123S634000
Reexamination Certificate
active
07152591
ABSTRACT:
An ignition apparatus for an internal combustion engine can suppress radiation noise radiated into air from a discharge current path, thereby preventing the malfunction of electrical equipment mounted on a vehicle. The ignition apparatus includes a transformer having a primary winding and a secondary winding, a conductor for impressing a high voltage generated at a high voltage side of the secondary winding upon interruption of a primary current to the primary winding to a spark plug, a plug boot enclosing the conductor so as to electrically insulate it from the outside and to hold the spark plug, and a metal sleeve arranged to enclose the plug boot and having one end thereof electrically connected directly or indirectly to a low voltage side of the secondary winding, and the other end thereof electrically connected directly or indirectly to the spark plug.
REFERENCES:
patent: 6463918 (2002-10-01), Moga et al.
patent: 2002/0046746 (2002-04-01), Nakabayashi et al.
patent: 2004/0084036 (2004-05-01), Porter et al.
patent: 2004/0231652 (2004-11-01), Kondo et al.
patent: 2002-081360 (2002-03-01), None
Maeda Masayoshi
Shimizu Takeshi
Mitsubishi Denki & Kabushiki Kaisha
Solis Erick R
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