![]() The fuel injector according to claim 1 wherein the hydraulic displacement amplifier further includes at least one of a spring, magnet, or pneumatic cylinder coupled to at least one of the plurality of pistons and configured to return the hydraulic displacement amplifier to a starting position at the end of a hydraulic displacement amplification cycle.Ħ. The fuel injector according to claim 1 wherein the fuel injector comprises a fuel injector in a diesel engine.ĥ. The fuel injector according to claim 1, wherein the hydraulic displacement amplifier further includes a check valve in communication with the working volume reservoir, and further wherein the check valve is responsive to a pressure condition in the hydraulic displacement amplifier.Ĥ. ![]() The fuel injector according to claim 1 wherein the plurality of pistons includes a first piston and a second piston, and wherein the first piston has a different cross-sectional area than the second piston.ģ. A gaseous fuel injector, comprising: a piezoelectric actuator a working volume reservoir adjustable between a first volume and a second volume smaller than the first volume a combustion chamber valve in communication with the working volume reservoir and movable between a closed configuration when the working volume reservoir comprises the first volume and an open configuration when the working volume reservoir comprises the second volume and a hydraulic displacement amplifier in operable connection with the actuator, the hydraulic displacement amplifier having a plurality of pistons in communication with the working volume reservoir and configured to adjust the working volume reservoir from the first volume to the second volume.Ģ.
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