Method and apparatus for preventing backfiring in spark ignition, internal combustion engines
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United States of America Patent
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-
Apr 16, 2002
Grant Date -
N/A
app pub date -
Jun 28, 2000
filing date -
Jun 29, 1999
priority date (Note) -
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Abstract
A system and method for minimizing the likelihood of backfiring as a spark ignition, internal combustion engine is turned off. A fuel cut-off device stops the flow of fuel into the engine in response to an engine shut-off control signal, such as when the on-off keyswitch is moved from the 'on' position to the 'off' position. The ignition spark is maintained to the engine for a predetermined length of time after fuel shut-off. The delay time is selected to allow the fuel cut-off device to operate to stop the flow of fuel into the engine. In this way, for as long as the engine is turning over, the engine is provided with an electric spark for controlled ignition, thereby minimizing or eliminating backfiring.
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