Method and electronic apparatus for reversing the rotation of an engine
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United States of America Patent
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Dec 14, 2004
Grant Date -
Jun 19, 2003
app pub date -
Dec 12, 2002
filing date -
Dec 18, 2001
priority date (Note) -
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Abstract
A method and an electronic apparatus for reversing the rotation of a two-stroke internal combustion engine, provided with an ignition system powered by a permanent magnet voltage generator. The electronic apparatus comprises a microprocessor control unit programmed for controlling the sparking both during forward and backward rotations, and for controlling the reversal rotation procedure of the engine. The reversal procedure is controlled on the basis of information obtained from a first binary signal emitted by a bistable magnetic sensor activated by the magnetic flux of the generator, and from a second binary signal correlated to the polarities of output voltage of the voltage generator. The original forward or backward rotation is made to reverse by providing a sparking delay, and subsequently generating an advanced spark while the engine is still rotating in the original direction.
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