Rotary valve actuator arrangement
AssigneeUnisia Jecs Corporation
InventorsHisaaki Sato, Masato Kumagai, Tomoaki Araki, Keiichi Kai
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Abstract
A rotary valve actuator arrangement including a rotary valve and an electromagnetic actuator actuating the rotary valve. The rotary valve includes a valve shaft rotatable about an axis and a valve body disposed on the valve shaft for unitary rotation therewith. The electromagnetic actuator includes two stator cores, two coils wound on the stator cores, and a rotor rotatable about the axis and including two projecting portions opposed to the stator cores. Mutually opposed surfaces of the stator cores and the projecting portions define a continuously variable area forming a magnetic path when the coil is energized.
Claims42
A rotary valve actuator arrangement, comprising:
- a casing having an intake air passage;
- a rotary valve disposed within said casing, said rotary valve including a valve shaft rotatable about an axis and a valve body disposed on said valve shaft and rotatable therewith to open and close the intake air passage, said valve body having a closed position and a full open position;
- and
- an electromagnetic actuator moving said valve body toward the full open position, said electromagnetic actuator including a stator core, a coil wound on said stator core, and a rotor opposed to said stator, said rotor being fixed to said valve shaft, said rotor having a valve-closing position corresponding to the closed position of said valve body and a valve-opening position corresponding to the full open position of said valve body;
- said stator core and said rotor cooperating to generate a magnetic field passing therethrough upon said coil being energized, said rotor being rotatably moved toward the valve-opening position by a magnetic attraction caused by the magnetic field.
A rotary valve actuator arrangement, comprising:
- a rotary valve including a valve shaft rotatable about an axis and a valve body disposed on said valve shaft for unitary rotation therewith, said valve body having a closed position and a full open position;
- and
- an electromagnetic actuator actuating said rotary valve, said electromagnetic actuator comprising:
- a coil;
- a stator core supporting said coil and having a first surface;
- and
- a rotor rotatable about said axis between a valve-closing position corresponding to the closed position of said valve body and a valve-opening position corresponding to the full open position of said valve body, said rotor having a second surface opposed to said first surface to define a continuously variable area that forms a magnetic path upon energization of the coil.
Dependencies are inferred from the claim text.