Fuel injector using two piezoelectric devices
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United States of America Patent
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Jul 18, 2006
Grant Date -
N/A
app pub date -
May 7, 2004
filing date -
May 7, 2004
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A fuel injector uses two or more individual piezoelectric devices. A first piezoelectric device is used to actuate a valve which allows pressurized fuel to pass from a pressure chamber through an outlet port. The fuel is pressurized by a second piezoelectric device. In certain applications, a return piezoelectric device is arranged in opposing configuration to the first piezoelectric device so that the valve can be positively moved both into its opened and closed positions rather than depending on the return force of a spring.
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