Method of operating a wood chipper and power transmission system for use therewith
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United States of America Patent
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Feb 9, 2010
Grant Date -
Feb 15, 2007
app pub date -
Jul 8, 2005
filing date -
Jul 8, 2005
priority date (Note) -
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status (Latency Note)
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Abstract
A wood chipper includes a control system for controlling feed wheel rotation and engine operation to provide safety features and a fuel-saving mechanism. The control system allows the engine to start only when the feed wheel is in neutral; stops and/or reverses rotation of the feed wheel in response to an increased load on the engine; and dethrottles the engine if the feed wheel remains in neutral for a predetermined period of time. A pair of electric switches are activatable by the feed bar whereby an electronic control unit (ECU) can determine the position of the feed bar based on activation or non-activation of the switches and control the feed wheel and engine in light thereof. The ECU controls a pair of directional control valves via respective solenoids to control flow of hydraulic fluid to control rotation of a feed motor which drives the feed wheel.
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