Spark ignition system having a capacitive discharge system and a

Details Spark ignition system having a capacitive discharge system and a Spark ignition system having a capacitive discharge system and a

1998-06-11

2000-09-26

Wolfe, Willis R.

Internal-combustion engines

High tension ignition system

Using capacitive storage and discharge for spark energy

123605, F02P 308

Patent

active

061230626

ABSTRACT:
A spark ignition system for an internal combustion engine has a capacitive discharge (CD) system connected to a coil-per-plug (CCP) magnetic core-coil assembly. The spark ignition system is connected to a spark plug and is adapted to initiate an ignition wherein a spark is produced across the gap of the spark plug. The spark ignition system includes a magnetic core-coil assembly having an amorphous metal magnetic core, a primary coil and a secondary coil for a high voltage output to be fed to a spark plug. The CD system is charged and rapidly discharged through the primary coil of the magnetic core-coil assembly using a silicon controlled rectifier (SCR) as the switch. Operation of the SCR is controlled by circuitry that controls the firing of the spark ignition system. The magnetic core-coil assembly acts as a pulse transformer, so that voltage across its secondary coil is related to the turns ratio of secondary to primary.

REFERENCES:
patent: 4616241 (1986-10-01), Yoshinari
patent: 4688538 (1987-08-01), Ward et al.
patent: 4846129 (1989-07-01), Noble
patent: 5163411 (1992-11-01), Koiwa et al.
WO 97 41576 A (Allied Signal Inc) Nov. 6, 1997 see p. 8, line 17--p. 16, line 5.
Patent Abstracts Of Japan vol. 012, No. 254 (E-634), Jul. 16, 1988 & JP 63 041008 A (Hitachi Ltd), Feb. 22, 1988 see abstract.

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