| 摘要 |
An engine air intake valve for controlling engine idling speed includes a rotary electrical actuator for actuating a rotary slidable valve element across a flow port in a cylindrical valve seat. The flow port is rectangular so that each unit angular movement of the valve element produces the same in air flow rate. The rotary electrical actuator includes a stator having a wire wound therearound to produce two opposed magnetic poles at diametrically-spaced points on the stator circumference.
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