Arrangement for identifying a switching position of a switch on an internal combustion engine in a handheld work apparatus
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United States of America Patent
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Aug 23, 2016
Grant Date -
Jan 30, 2014
app pub date -
Jul 29, 2013
filing date -
Jul 27, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
The invention relates to an arrangement for identifying a switching position of a switch (on an internal combustion engine in a handheld work apparatus. An energy source for supplying power to an inductive electrical load is provided, it being possible to connect the load to the energy source in order to be switched on and off via a controller. The switch is arranged in a voltage branch which is connected in parallel with the inductive load and in which a zener diode is also connected. The zener diode is activated or inactivated via the switch as a function of the switching position of the switch. The amplitude of the switch-off voltage, which is induced when the inductive load is disconnected, is limited by the zener diode, so that it is possible to read from the magnitude of the amplitude whether the switch is closed or open.
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