Fuel injector with piezoelectric actuator preload

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United States of America Patent

PATENT NO 7140353
SERIAL NO

11167556

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Abstract

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An piezoelectric actuated injector is provided which includes a nozzle valve element, a control volume, and an injection control valve including a control valve member for controlling fuel flow from the control volume so as to control nozzle valve movement. Importantly, the injector includes a preload chamber positioned along an injection control valve member for receiving high pressure fuel. The high pressure fuel acts on the injection control valve member to apply a preload force to supply a preload force to the stack of piezoelectric elements thereby ensuring more accurate control over fuel injection timing and metering.

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Patent Owner(s)

Patent OwnerAddress
CUMMINS INC500 JACKSON STREET COLUMBUS IN 47201

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Buchanan, David L Westport, IN 31 319
Peters, Lester L Columbus, IN 77 1876
Rauznitz, Peter Columbus, IN 9 243

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