Engine-powered work tool provided with wind governor that performs ignition control
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United States of America Patent
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Jun 6, 2017
Issued Date -
N/A
app pub date -
Dec 22, 2014
filing date -
Dec 27, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
An engine-powered work tool includes an engine having a crank shaft, an ignition system, an output controller having a throttle valve shaft for controlling output of the engine, a wind governor connected to the throttle valve shaft, a rotation speed detector and an ignition control unit. The wind governor includes a governor plate movable upon receipt of cooling air generated by a cooling fan to control an angular rotation of the throttle valve shaft. The rotation speed detector detects a rotation speed of the crank shaft. The ignition control unit controls the ignition system based on the rotation speed of the crank shaft detected by the rotation speed detector to reduce the output of the engine when the rotation speed detector determines that the governor plate exceeds a predetermined position.
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