with means for avoiding fuel contact with actuators, e.g. isolating actuators by using bellows or diaphragms

Full Title

Details of fuel-injection apparatus, not otherwise provided for > Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger > hydraulic > with means for avoiding fuel contact with actuators, e.g. isolating actuators by using bellows or diaphragms