Internal-combustion engines – Poppet valve operating mechanism – Electrical system
Reexamination Certificate
2007-09-17
2010-10-26
Chang, Ching (Department: 3748)
Internal-combustion engines
Poppet valve operating mechanism
Electrical system
C123S090150, C123S406120, C251S129010
Reexamination Certificate
active
07819095
ABSTRACT:
An internal combustion engine comprises a number of cylinders. The cylinders have electronically activated intake valves. Ignition coils for the cylinders are responsive to respective ignition signals such that charge accumulates in a coil for a cylinder when the ignition signal for the cylinder has a first state and then the charge causes ignition for the cylinder when the ignition signal for the cylinder changes to a second state. In response to detecting an intake valve fault in respect of a cylinder, the ignition signal for the cylinder is held in the first state for a number of cycles of the internal combustion engine, and is then switched to a second state to safely discharge the primary coil without combustion in the cylinder.
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Picron, V., Postel, Y.; “Electro-Magnetic Valve Actuation System: Functional characteristics and benefits”; SIA Conference on Variable Valve Actuation; Nov. 30, 2006; pp. 1-10.
Chang Ching
Denso Corporation
Nixon & Vanderhye P.C.
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