System and method for calibrating electrohydraulic valve

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United States of America Patent

PATENT NO 9568119
APP PUB NO 20150354724A1
SERIAL NO

14296510

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A method of calibrating an electrohydraulic valve is disclosed. The method includes actuating an on-off valve to an open position. A speed of a fixed displacement pump is regulated to establish a desired flow rate at an outlet of the pump. The pump is in fluid communication within a closed loop circuit with the on-off valve and the electrohydraulic valve. A target pressure in the closed loop circuit is determined as a function of the desired flow rate. The method further includes increasing a current to the electrohydraulic valve and monitoring the target pressure in the closed loop circuit. A start of a fluid flow through the electrohydraulic valve is determined based on a drop in the target pressure within the closed loop circuit.

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Patent Owner(s)

Patent OwnerAddress
CATERPILLAR GLOBAL MINING LLC1100 MILWAUKEE AVENUE SOUTH MILWAUKEE WI 53172

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Beschorner, Matthew J Plainfield, US 15 109
Janson, Brett J Hanna City, US 8 87

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