Fuel injector actuator assemblies and associated methods of use and manufacture

A fuel injector for delivering fuel to an engine, the fuel injector comprising:

• a body having a fuel conduit for receiving the fuel from a fuel source and a fuel exit passage for delivering the fuel to a combustion chamber of the engine;
• an actuator having a valve and a stop, wherein the stop is configured to move from a first position to a second position to move the valve from a closed position to an open position;
• a driver positioned proximate to the actuator and configured to travel longitudinally within the body to impact the stop to move the stop from the first position to the second position;
• and
• a magnet positioned in the body, wherein the travel of the driver to impact the stop is in a first direction, wherein the magnet is configured to bias the driver in a second direction, opposite to the first direction, and wherein biasing of the driver in the second direction at least partially maintains the valve in the closed position.

A fuel injector for delivering fuel to an engine, the fuel injector comprising:

• a body having a fuel conduit for receiving the fuel from a fuel source and a fuel exit passage for delivering the fuel to a combustion chamber of the engine;
• an actuator having a valve and a stop, wherein the stop is configured to move from a first position to a second position to move the valve from a closed position to an open position;
• a driver positioned proximate to the actuator and configured to travel longitudinally within the body to impact the stop to move the stop from the first position to the second position;
• and
• an electromagnetic force generator configured to generate a magnetic field to move the driver, and wherein the driver includes a slit radially extending through at least a portion of the driver, the slit configured to reduce eddy currents induced by the force generator.

A fuel injector for delivering fuel to a combustion chamber of an engine, the fuel injector comprising:

• a body having a nozzle portion opposite a base portion, wherein the nozzle portion is configured to extend through a port to the combustion chamber, and wherein the base portion is configured to receive the fuel from a fuel source;
• an actuator positioned at least partially within the body, the actuator having a valve at the nozzle portion and a stop at the base portion, wherein the valve is configured to meter the fuel delivered to the combustion chamber;
• and
• a driver extending from a first end to a second end and encircling at least a portion of the actuator, wherein the driver is configured to move from a first position with the first end spaced apart from the stop to a second position with the first end in contact with the stop, and wherein movement of the driver from the first position to the second position includes:
• movement of the first end of the driver to impact the stop to move the valve to an open position;
• and
• movement of the second end of the driver away from the valve.

A fuel injector for delivering fuel to an engine, the fuel injector comprising:

• a body having a fuel conduit for receiving the fuel from a fuel source and a fuel exit passage for delivering the fuel to a combustion chamber of the engine;
• an actuator having a valve and a stop, wherein the stop is configured to move from a first position to a second position to move the valve from a closed position to an open position;
• and
• a driver positioned proximate to the actuator and configured to travel longitudinally within the body to impact the stop to move the stop from the first position to the second position, wherein the driver extends along an axis from a first end to a second end, and wherein both the first end and the second end of the driver travel longitudinally within the body.