Multiple intensifier injectors with positive needle control and methods of injection
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United States of America Patent
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Nov 12, 2013
Grant Date -
Jul 29, 2010
app pub date -
Mar 31, 2010
filing date -
May 9, 2007
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Abstract
Multiple intensifier injectors with positive needle control and methods of injection that reduce injector energy consumption. The intensifiers are disposed about the axis of the injectors, leaving the center free for direct needle control down the center of the injector. Also disclosed is a boost system, increasing the needle closing velocity but without adding mass to the needle when finally closing. Direct needle control allows maintaining injection pressure on the fuel between injection events if the control system determines that enough fuel has been pressurized for the next injection, thus saving substantial energy when operating an engine at less than maximum power, by not venting and re-pressurizing on every injection event.
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