Solenoid actuator with improved reaction time

An actuator assembly, comprising:

• a support part;
• a solenoid actuator connected to the support part, the solenoid actuator having a coil at least partially surrounding an axis, an armature sleeve extending at least partially through the coil, the armature sleeve including a longitudinally extending wall that extends generally parallel to the axis, and an end portion that extends inwardly at an end of the longitudinally extending wall, and an armature slidably supported in the armature sleeve for movement along the axis between at least first and second actuation positions, the armature having an armature body having an outer longitudinal surface facing the longitudinally extending wall and an end surface facing the end portion of the armature sleeve, and an actuator pin extending from the armature;
• and
• an actuation part that is acted upon by the actuator pin in at least one of the first or second actuation positions;
• wherein the longitudinally extending wall has a sliding fit with the outer longitudinal surface of the armature, and an oil reservoir space is formed on the armature in a region of an intersection between the outer longitudinal surface and the end surface of the armature.