Patent ID: 6116215
Filing Date: 2000-09-12
Classification: F02D,F05C

Abstract:
A throttle valve assembly for supplying air or fuel-air mixture to an intake associated with an engine, comprising:an integrally formed valve body adapted for mounting to the engine, wherein the valve body defines an actuation device cavity, a flow passage adapted to communicate with the engine intake, a sensor mounting structure, a first opening communicating between the flow passage and the actuation device cavity, and a second opening communicating between the flow passage and a location adjacent the sensor mounting structure;a valve shaft extending transversely through the flow passage and including a first portion extending through the first opening and a second portion extending through the second opening, wherein the valve shaft is rotatably supported within the first and second openings relative to the valve body;a valve member mounted to the valve shaft and disposed within the flow passage, wherein the valve member comprises of pair of wings extending laterally from an axially extending offset central mounting portion adapted to be secured to the valve shaft;a pole carrier interconnected with the valve shaft;a pole arrangement interconnected with the pole carrier;an electromagnetic actuation device received within the actuation device cavity, comprising a coil housing including a substantially solid central core and defining an annular coil recess surrounding the core and opening onto an end defined by the coil housing, an outer wall located outwardly of the coil recess, and a coil received within the coil recess, wherein the pole arrangement extends into the coil recess without contacting the coil housing for selectively imparting rotation to the pole carrier, and thereby to the valve shaft, in response to energization of the coil;a position indicating member interconnected with the second portion of the valve shaft;a position sensing arrangement mounted to the sensor mounting structure defined by the valve body for sensing the position of the shaft, and thereby the valve member, in response to orientation of the position indicating member relative to the position sensing arrangement;wherein the sensor mounting structure and the actuation device cavity are located on opposite ends of the valve body and wherein the flow passage is located between the sensor mounting structure and the actuation device cavity;stop structure defined by the valve body adjacent the sensor mounting structure and including a shoulder; anda stop member interconnected with the valve shaft and oriented relative to the valve body so as to engage the shoulder when valve shaft attains a predetermined position relative to the valve body and the flow passage for preventing further movement of the valve member relative to the valve body, wherein the position sensing arrangement is interconnected with the valve body via a flange member secured to the valve body, wherein the flange member is constructed and arranged to enclose the stop structure and to mount the position sensing arrangement to the valve body.