Engine with variable opening inlet valve means

Claim 2

In combination with an internal combustion engine of the type having a cylinder defining a variable volume combustion chamber and means defining an inlet passage to deliver combustible mixture to said combustion chamber. inlet valve means in a wall of said combustion chamber and openable to control the intake of combustible mixture into said combustion chamber, said inlet valve means comprising: means defining an inlet port opening through said combustion chamber wall and connecting said combustion chamber with said inlet passage, said inlet port means having an annular valve seat around said port on the combustion chamber side thereof; a poppet valve member extending through said inlet port and reciprocably movable into and out of engagement with said valve seat to respectively close and open said port to flow therethrough; a throttle valve member having an imperforate annular head reciprocably movable on the same axis as said poppet valve member into and out of a close fitting position within said inlet port and closely adjacent said valve seat to respectively substantially close and open said port to flow therethrough; first actuating means connected with said poppet valve member and adapted to cyclically move said poppet valve member between its open and closed positions so as to control the timing of the inlet valve openings; and second actuating means connected with said throttle valve member and actuable to vary its position as desired so as to vary the extent of the inlet valve openings.

Claim 3

In combination with an internal combustion engine of the type having a cylinder block, a cylinder head closing the end of said cylinder block comprising; defining therewith a variable volume combustion chamber and an inlet passage in said cylinder head to deliver combustible mixture to said combustion chamber: inlet valve means carried by said cylinder head and openable to control the intake of combustible mixture into said combustion chamber, said inlet valve means comprising; means defining a short circular inlet port opening through a wall of said cylinder head and connecting said combustion chamber with said inlet passage, said inlet port means having an annular valve seat extending around said port on the combustion chamber side thereof; a poppet valve member having a head portion engageable with said valve seat and a stem portion extending through said inlet port, said poppet valve member being supported by said cylinder head for reciprocating movement into and out of engagement with said valve seat to respectively close and open said inlet port to flow therethrough; a throttle valve member reciprocably carried in said cylinder head and having an imperforate annular head member disposed arounD said poppet valve stem for reciprocating movement within said inlet passage into and out of a close fitting position within said inlet port and closely adjacent said valve seat to respectively substantially close and open said port to flow therethrough; first actuating means connected with said poppet valve member and adapted to cyclically move said poppet valve member between its open and closed positions so as to control the timing of the inlet valve openings; and second actuating means connected with said throttle valve member and actuable to vary its position as desired so as to vary the extent of the inlet valve openings.

Claim 4

In combination with an internal combustion engine of the type having a cylinder block, a cylinder head closing the end of said cylinder block comprising; defining therewith a variable volume combustion chamber and an inlet passage in said cylinder head to deliver combustible mixture to said combustion chamber: inlet valve means carried by said cylinder head and openable to control the intake of combustible mixture into said combustion chamber, said inlet valve means comprising; means defining a short circular inlet port opening through a wall of said cylinder head and connecting said combustion chamber with said inlet passage, said inlet port means having an annular valve seat extending around said port on the combustion chamber side thereof; a poppet valve member having a head portion engageable with said valve seat and a stem portion extending through said inlet port, said poppet valve member being supported by said cylinder head for reciprocating movement into and out of engagement with said valve seat to respectively close and open said inlet port to flow therethrough; a throttle valve member reciprocably carried in said cylinder head and having an imperforate annular head member disposed arounD said poppet valve stem for reciprocating movement within said inlet passage into and out of a close fitting position within said inlet port and closely adjacent said valve seat to respectively substantially close and open said port to flow therethrough; first actuating means connected with said poppet valve member and adapted to cyclically move said poppet valve member between its open and closed positions so as to control the timing of the inlet valve openings; and second actuating means connected with said throttle valve member and actuable to vary its position as desired so as to vary the extent of the inlet valve openings.

Claim 5

The combination of claim 2 wherein said throttle valve member includes a hollow stem portion concentrically surrounding said poppet valve stem and slidably movable thereon.

Claim 6

The combination of claim 3 wherein said throttle valve hollow stem is received in a bore of said cylinder head and reciprocably supports said poppet valve stem, said second actuating means including a pinion gear supported on the cylinder head and engaging teeth formed in the throttle valve stem, said pinion gear being rotatably move to vary the position of said throttle valve.

Claim 7

The combination of claim 3 wherein said second actuating means comprises a lever carried within said inlet passage on a control shaft and adapted for oscillating movement therewith, said throttle valve having an annular recess and said lever having a bifurcated end portion engaging said annular recess to provide for movement of said throttle valve by said control shaft.

Claim 8

The combination of connected with said annular head member and reciprocably carried 2 wherein said poppet valve stem is received in a bore of said cylinder head arranged coaxially with said inlet port, said throttle valve having a stem portion eccentrically connected with said annular head member and reciprocably carried in a second bore of said cylinder head parallel with and offset from said first named bore and said second actuating means includes a pinion gear secured to a rotatable shaft and in engagement with teeth formed on said throttle valve stem portion for positioning said throttle valve.

Claim 9

The combination of connected with said annular head member and reciprocably carried 2 wherein said poppet valve stem is received in a bore of said cylinder head arranged coaxially with said inlet port, said throttle valve having a stem portion eccentrically connected with said annular head member and reciprocably carried in a second bore of said cylinder head parallel with and offset from said first named bore and said second actuating means includes a pinion gear secured to a rotatable shaft and in engagement with teeth formed on said throttle valve stem portion for positioning said throttle valve.