PIEZOELECTRIC CERAMIC ACTUATORS


Piezoelectric ceramic actuators are fast and can operate the needle directly as shown in patents 4,022,166 and 5,845,852 and particularly SAE paper #2008-01-0941 among other examples. The SAE paper quantifies the benefits.

However.

If piezo injectors were durable, they would have long ago replaced the solenoid and servo valve.

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