Internal-combustion engines – Spark ignition timing control – Electronic control
Reexamination Certificate
2008-07-03
2009-12-01
Cronin, Stephen K (Department: 3747)
Internal-combustion engines
Spark ignition timing control
Electronic control
C073S114620, C073S114670
Reexamination Certificate
active
07624717
ABSTRACT:
An internal-combustion-engine combustion condition detection apparatus that can accurately comprehend a combustion condition is obtained. The internal-combustion-engine combustion condition detection apparatus includes an ion-current detection device (41) that detects an ion current generated during combustion and ignition devices including a first ignition device (21) having a first ignition plug (11) that causes main combustion in a combustion chamber (33) and a second ignition device (22) having a second ignition plug (12) disposed in the same combustion chamber (33) as and spaced apart from the first ignition plug (11) of the first ignition device (21); the ion-current detection device (41) detects a combustion ion current that is generated in the second ignition device (22) regardless of whether or not ignition is performed by the second ignition device (22), thereby detecting pre-ignition or a precursor phenomenon of pre-ignition.
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Inada Takahiko
Okamura Koichi
Tanaya Kimihiko
Cronin Stephen K
Hoang Johnny H
Mitsubishi Electric Corporation
Sughrue & Mion, PLLC
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