Actuator displacement measurement system in electronic hydraulic system of construction equipment
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United States of America Patent
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Nov 29, 2016
Grant Date -
Aug 21, 2014
app pub date -
Oct 11, 2011
filing date -
Oct 11, 2011
priority date (Note) -
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Abstract
An actuator displacement measuring system in an electro-hydraulic system for a construction machine is disclosed, which can detect an actuator displacement using the characteristics of an electro-hydraulic system. The actuator displacement measuring system includes controlling driving of an electric motor, determining whether the electric motor is driven, determining whether a set pressure value of a relief valve is larger than or equal to a measured pressure value of the hydraulic system if a displacement value of an actuator that is always detected deviates from a zero value of a reference position, setting the actuator displacement value to a previous value if a pressure value of the hydraulic system is larger than or equal to a pressure value of a relief valve and calculating the actuator displacement value using a rotating speed of the electric motor.
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