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 emissions and fuel economy benefits.

However.

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

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