Spark ignition engine, controller for use in the engine, ignition coil for use in the engine
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United States of America Patent
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Apr 8, 2008
Grant Date -
Sep 14, 2006
app pub date -
Feb 13, 2006
filing date -
Mar 14, 2005
priority date (Note) -
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Abstract
An engine generating two or more ignition sparks by the same spark plug, which can avoid a torque reduction caused by misfire of main ignition, can start firing and burning at proper timing depending on operating conditions, and can reduce misfires. A novel controller and a novel ignition coil adapted for realizing that engine are also provided. One spark plug and at least one ignition coil are provided per cylinder. When performing a plurality of ignitions during the compression stroke in the cylinder, before main ignition to start firing and burning at proper timing depending on operating conditions of the engine, preliminary pre-ignition is performed to form a fire seed around the spark plug. The main ignition is then performed to cause main burning. Misfire is avoided, appropriate torque can be generated, and combustion stability can be improved.
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