Apparatus for shutting off power supply for vehicle
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United States of America Patent
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Jul 1, 2014
Grant Date -
May 12, 2011
app pub date -
Oct 20, 2010
filing date -
Nov 11, 2009
priority date (Note) -
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status (Latency Note)
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Abstract
An apparatus for shutting off a power supply for construction equipment or a vehicle driven by an engine, including a power supply, functional electrical devices connected to the power supply, a key switch managing the power supply, and a main relay applying or shutting off the power supply to the functional electrical devices in accordance with the state of the key switch, which includes a manipulation sensing means, a control relay installed between the key switch and the main relay to apply a key switch signal to a driving unit of the main relay if the electricity is not applied to its driving unit and to shut off the key switch signal to the driving unit of the main relay if the electricity is applied to its driving unit, and a controller receiving a manipulation signal from the manipulation sensing means and shutting off the power by driving the control relay if there is no manipulation signal for a predetermined time. If the equipment is not used for a predetermined time, the engine is stopped even under the condition that the engine is being driven, and even if the key switch is in a turned-on state, the power that is supplied to the functional electrical devices can be stably intercepted by the controller.
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