Ball poppet valve having valve body widening in funnel shape

1. An electromagnetically actuated ball poppet valve, comprising: a valve body, an accommodating aperture disposed in the valve body, a valve bore disposed in the valve body, a ball poppet for closing the valve bore and a control stem acting on the ball poppet, wherein the accommodating aperture of the valve body, starting from a cylindrical wall part of constant diameter, widens at an end opposite the control stem in at least approximately a funnel shape, wherein the valve bore has an inlet, and the ball poppet is seated in the cylindrical wall part of the accommodating aperture against the inlet of the valve bore when the ball poppet valve is in a closed position.

2. The ball poppet valve of claim 1 , wherein the cylindrical wall part of the valve body extends at least to half the diameter of the ball poppet when the ball poppet sits sealingly on the valve bore.

3. The ball poppet valve of claim 1 , wherein, starting from the cylindrical wall part of the valve body, the accommodating aperture of the valve body widens with a first angle.

4. The ball poppet valve of claim 3 , wherein this first angle is between about 1° and 45° relative to a central axis of the ball poppet valve.

5. The ball poppet valve of claim 4 , wherein a second angle is adjacent to this first angle.

6. The ball poppet valve of claim 5 , wherein this second angle is larger than the first angle and is not greater than 85°.

7. The ball poppet valve of claim 4 , wherein, relative to the central axis of the ball poppet valve, a wall part of the valve body with the first angle exhibits a height not greater than roughly 70% of the total lifting of the ball poppet.

8. The ball poppet valve of claim 3 , wherein the accommodating aperture of the valve body exhibits an internal contour that, at each of various axial positions of the ball poppet, takes on a well-defined annular area perpendicular to the central axis of the ball poppet valve, said annular area being smaller than an aperture area of the ball poppet valve, the aperture area being defined by the area of the valve bore minus the cross-sectional area of the control stem intruding into the valve bore.

9. The ball poppet valve of claim 8 , wherein the annular area lying nearer the valve bore when the ball poppet is lifted off is smaller than the well-defined annular area when the ball poppet is lifted farther off.

10. The ball poppet valve of claim 1 , wherein the accommodating aperture of the valve body widens in arcuate or parabolic fashion.

11. A ball poppet valve, comprising:

a valve housing;

a valve bore within the housing where the valve bore has an inlet and an outlet;

a poppet accommodating aperture in the valve housing, where the poppet accommodating aperture has a first segment and a second segment that flares out from the first segment;

a valve stem slideably co-axially located within the valve bore, where the valve stem includes a distal end; and

a ball poppet affixed to the distal end of the valve stem;

where, in a closed position, the ball poppet is seated in the first segment of the poppet accommodating aperture against the inlet of the valve bore to prevent flow of a medium between the accommodating aperture and the valve bore; and

where, in a non-closed position, flow between the inlet and the outlet is a function of how far the ball poppet is moved from the first segment into the second segment.

12. The ball poppet valve of claim 11 , where

the first segment comprises a cylindrical side wall that form a cylindrical region in direct contact with the valve bore, where the cylindrical side wall is parallel to a center line of the valve bore; and

the second segment is axially separated from the valve bore by the first segment, where the second segment includes a second side wall that extends outwardly and at a non-zero angle with respect to the center line of the valve bore and from a distal end of the cylindrical side wall.

13. The ball poppet valve of claim 12 , where the ball poppet has a radius, and the cylindrical side wall has a height approximately equal to the radius of the ball poppet.

14. The ball poppet valve of claim 11 , comprising an electromagnet actuator that slideably moves the valve stem within the valve bore.

15. A ball poppet valve, comprising:

a housing;

a cylindrical bore within the housing where the bore has a flow inlet and a flow outlet;

a poppet accommodating aperture in the housing, where the poppet accommodating aperture has a cylindrical segment and a flared segment;

a valve stem slideably and co-axially located within the bore, where the valve stem includes a distal end and has a constant cross section; and

a ball poppet affixed to the distal end of the valve stem;

where, in a closed position, the ball poppet is seated in the cylindrical segment of the poppet accommodating aperture against the flow inlet of the cylindrical bore to prevent flow of a medium between the poppet accommodating aperture and the cylindrical bore; and

where, in a non-closed position, flow between the inlet and the outlet is controlled as a function of how far the ball poppet is moved from the flow inlet of the cylindrical bore.

16. The ball poppet valve of claim 15 , where

the cylindrical segment has a cylindrical side wall in direct contact with the cylindrical bore, where the cylindrical side wall is parallel to a center line of the cylindrical bore; and

the flared segment is axially separated from the cylindrical bore by the cylindrical segment, where the flared segment includes a second side wall that extends outwardly at a non-zero angle with respect to the center line of the cylindrical bore and from a distal end of the cylindrical side wall.

17. The ball poppet valve of claim 3 , wherein the first angle is roughly between 5° and 30° relative to a central axis of the ball poppet valve.

18. The ball poppet valve of claim 1 , wherein the constant diameter of the cylindrical wall part is substantially equal to a diameter of the ball poppet.