Mass flow air meter

Claim 2

An air valve for use in an engine air induction system having throttle means for controlling air flow therethrough, said air valve including a housing in the system upstream of the throttle means, a cross bore in said housing, a first contoured hole of continuous profile extending from one surface of said housing and running out at said cross bore, a second contoured hole of continuous profile, inverted with respect to said first contoured hole, extending from the opposite surface of said housing and running out at said cross bore, a straight edged valve plate rotatably mounted in said cross bore for movement between closed and open positions relative to said contoured holes, said valve plate when in an open position defining with said contoured holes a pair of air flow areas the size of which increases at a predetermined fixed rate relative to the valve plate angle and, a servo mechanism responsive to air pressure upstream and downstream of said valve plate operatively connected to said valve plate to effect movement of said valve plate to maintain a constant depression across said valve plate.

Claim 3

A mass flow air meter valve for use in the induction passage of an internal combustion engine comprising a housing, a cross bore through said housing, side plates secured to opposite sides of said housing to enclose said cross bore, a first contoured hole of continuous profile extending from one surface of said housing to run out at said cross bore, a second contoured hole of continuous profile, inverted with respect to said first contoured hole, extending from the opposite face of said housing to run out at said cross bore, a shaft journalled in said side plates and extending through said cross bore concentrically therewith, a valve plate fixed to said shaft for rotation in said cross bore between closed and open positions relative to said contoured holes, said valve plate when in an open position defining with said first and second contoured holes a pair of air flow areas, the size of which increases in a predetermined relation to the angular opening position of said valve plate so that equal increments of valve plate rotation will provide equal percentage change in air flow and, a servo mechanism responsive to air pressure upstream and downstream of said valve plate operatively connected to said shaft to effect movement thereof and of said valve plate upon a change in the air flow depression across said valve plate.

Claim 4

A mass flow air meter valve for use in the induction passage of an internal combustion engine comprising a housing, a cross bore through said housing, side plates secured to opposite sides of said housing to enclose said cross bore, a first contoured hole of continuous profile extending from one surface of said housing to run out at said cross bore, a second contoured hole of continuous profile, inverted with respect to said first contoured hole, extending from the opposite face of said housing to run out at said cross bore, a shaft journalled in said side plates and extending through said cross bore concentrically therewith, a valve plate fixed to said shaft for rotation in said cross bore between closed and open positions relative to said contoured holes, said valve plate when in an open position defining with said first and second contoured holes a pair of air flow areas, the size of which increases in a predetermined relation to the angular opening position of said valve plate so that equal increments of valve plate rotation will provide equal percentage change in air flow and, a servo mechanism responsive to air pressure upstream and downstream of said valve plate operatively connected to said shaft to effect movement thereof and of said valve plate upon a change in the air flow depression across said valve plate.

Claim 5

A flow control valve including a valve body having a cross bore therethrough, side covers secured to opposite sides of said valve body to enclose said cross bore, a first contoured hole of continuous profile extending from one surface of said valve body to run out at said cross bore, a second contoured hole of continuous profile, identical in size but inverted with respect to said first contoured hole, extending from the opposite surface of said valve body to run out at said cross bore, a shaft journalled in said side covers and extending through said cross bore concentrically therewith, a rectangular valve plate fixed to said shaft for rotation in said cross bore about the axis of rotation of said shaft for movement between a closed position and a full open position relative to said first contoured hole and said second contoured hole, said valve plate when in a position other than said closed position defining, with said contoured holes, two flow areas, each flow area being defined by a segment of one of said contoured holes and a radial edge of said valve plate and, a servo mechanism responsive to air pressure upstream and downstream of said valve plate operatively connected to said shaft to effect movement thereof and of said valve plate upon a change in the air flow depression across said valve plate.

Claim 6

A flow control valve including a valve body having a cross bore therethrough, side covers secured to opposite sides of said valve body to enclose said cross bore, a first contoured hole of continuous profile extending from one surface of said valve body to run out at said cross bore, a second contoured hole of continuous profile, identical in size but inverted with respect to said first contoured hole, extending from the opposite surface of said valve body to run out at said cross bore, a shaft journalled in said side covers and extending through said cross bore concentrically therewith, a rectangular valve plate fixed to said shaft for rotation in said cross bore about the axis of rotation of said shaft for movement between a closed position and a full open position relative to said first contoured hole and said second contoured hole, said valve plate when in a position other than said closed position defining, with said contoured holes, two flow areas, each flow area being defined by a segment of one of said contoured holes and a radial edge of said valve plate and, a servo mechanism responsive to air pressure upstream and downstream of said valve plate operatively connected to said shaft to effect movement thereof and of said valve plate upon a change in the air flow depression across said valve plate.

Claim 7

A flow control air valve including housing means having an enclosed cylindrical cavity therein of a predetermined axial length defined by an annular inner peripheral wall and opposed side walls in said housing means, a first contoured hole of continuous profile extending from an outer surface of said housing means through said inner peripheral wall, a second contoured hole of continuous profile, identical in size but inverted with respect to said first contoured hole, extending from an opposite outer surface of said housing means through said inner peripheral wall, a shaft rotatably journalled in said housing means to extend through said cylindrical cavity concentric therewith, a flat valve plate of a length and width corresponding to the diameter and length of said cylindrical cavity fixed to said shaft for rotation in said cylindrical cavity about the axis of rotation of said shaft whereby said valve plate is moved between a closed position and a full open position relative to said contoured holes, said valve plate as it is moved toward said full open position defining with said contoured holes a pair of flow areas, each of said flow areas being defined by a segment of one of said contoured holes and a radial edge of said valve plate and, a servo mechanism responsive to air pressure upstream and downstream of said valve plate operatively connected to said valve plate to effect movement of said valve plate to maintain a constant depression across said valve plate.

Claim 8

A flow control air valve including housing means having an enclosed cylindrical cavity therein of a predetermined axial length defined by an annular inner peripheral wall and opposed side walls in said housing means, a first contoured hole of continuous profile extending from an outer surface of said housing means through said inner peripheral wall, a second contoured hole of continuous profile, identical in size but inverted with respect to said first contoured hole, extending from an opposite outer surface of said housing means through said inner peripheral wall, a shaft rotatably journalled in said housing means to extend through said cylindrical cavity concentric therewith, a flat valve plate of a length and width corresponding to the diameter and length of said cylindrical cavity fixed to said shaft for rotation in said cylindrical cavity about the axis of rotation of said shaft whereby said valve plate is moved between a closed position and a full open position relative to said contoured holes, said valve plate as it is moved toward said full open position defining with said contoured holes a pair of flow areas, each of said flow areas being defined by a segment of one of said contoured holes and a radial edge of said valve plate and, a servo mechanism responsive to air pressure upstream and downstream of said valve plate operatively connected to said valve plate to effect movement of said valve plate to maintain a constant depression across said valve plate.

Claim 9

A flow control valve including housing means having an enclosed cylindrical cavity therein of a predetermined diameter and of a predetermined axial length defined by an annular inner peripheral wall and opposed side walls in said housing means, a first contoured hole extending from an outer surface of said housing means to run out at said inner peripheral wall, a second contoured hole of continuous profile extending from an opposite outer surface of said housing means to run out at said inner peripheral wall, said second contoured hole being identical to but inverted relative to said first contoured hole, a shaft rotatably journalled in said housing means and extending coaxially through said cylindrical cavity, a valve plate within said cylindrical cavity, said valve plate being of a length and width complementary to the diameter and length of said cylindrical cavity, and being fixed to said shaft for rotation therewith about the axis of rotation of said shaft whereby one radial edge of said valve plate is moved between a closed position and a full open position relative to said first contoured hole and the opposite radial edge of said valve plate is simultaneously moved between a closed position and a full open position relative to said second contoured hole, whereby two flow areas are uncovered, each of said flow areas being defined by a segment of one of said contoured holes and a radial edge of said valve plate and, a servo mechanism operatively connected to said valve plate and reSponsive to air pressure upstream and downstream of said valve plate to effect movement of said valve plate to maintain a constant depression across said valve plate.

Claim 10

A flow control valve including housing means having an enclosed cylindrical cavity therein of a predetermined diameter and of a predetermined axial length defined by an annular inner peripheral wall and opposed side walls in said housing means, a first contoured hole extending from an outer surface of said housing means to run out at said inner peripheral wall, a second contoured hole of continuous profile extending from an opposite outer surface of said housing means to run out at said inner peripheral wall, said second contoured hole being identical to but inverted relative to said first contoured hole, a shaft rotatably journalled in said housing means and extending coaxially through said cylindrical cavity, a valve plate within said cylindrical cavity, said valve plate being of a length and width complementary to the diameter and length of said cylindrical cavity, and being fixed to said shaft for rotation therewith about the axis of rotation of said shaft whereby one radial edge of said valve plate is moved between a closed position and a full open position relative to said first contoured hole and the opposite radial edge of said valve plate is simultaneously moved between a closed position and a full open position relative to said second contoured hole, whereby two flow areas are uncovered, each of said flow areas being defined by a segment of one of said contoured holes and a radial edge of said valve plate and, a servo mechanism operatively connected to said valve plate and reSponsive to air pressure upstream and downstream of said valve plate to effect movement of said valve plate to maintain a constant depression across said valve plate.