Method and apparatus for controlling needle seat load in very high pressure diesel injectors
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United States of America Patent
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Jan 14, 2014
Grant Date -
Jul 7, 2011
app pub date -
Jan 7, 2011
filing date -
Jan 7, 2010
priority date (Note) -
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Abstract
Method and apparatus for controlling needle seat load in very high pressure diesel injectors. In accordance with the method, a needle control piston responsive to hydraulic forces for controllably forcing the injector needle against the needle seat is provided, as is a stop for the needle control piston to limit the needle control piston movement toward the needle seat. This provides a stop for the needle control piston, so that the compressive deflection between the needle control piston and the needle seat limits the force of the injector needle on the needle seat against increasing hydraulic forces on the needle control piston once the needle control piston reaches the needle control piston seat.
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