High performance vacuum venturi pump

Patent metadata

Field	Value
Publication number	US-9605625-B2
Application number	US-201414542985-A
Country	US
Kind code	B2
Filing date	Nov 17, 2014
Priority date	Dec 19, 2013
Publication date	Mar 28, 2017
Grant date	Mar 28, 2017

Abstract

A venturi valve assembly, having a flow tube, an upper port integrally formed with flow tube, a flow cavity disposed within the flow tube, an inlet formed as part of the flow tube such that the inlet forms a part of the flow cavity, an outlet formed as part of the flow tube such that the outlet forms a part of the flow cavity, and a venturi nozzle disposed in the flow tube. Pressurized air flows into the flow cavity from the inlet such that the pressurized air flows around the venturi nozzle. Purge vapor flows into the flow cavity from the upper port, and the flow rate of the pressurized air is increased after flowing around the venturi nozzle, increasing the flow of the purge vapor after the purge vapor is mixed with the pressurized air in the flow tube.

First claim

What is claimed is:

1. An apparatus, comprising:
a venturi valve assembly, including:
a flow cavity;
an inlet, a portion of the inlet forming a portion of the flow cavity;
at least one inner surface being part of the inlet, the at least one inner surface being tapered;
a venturi nozzle disposed within the flow cavity such that at least a portion of the venturi nozzle is in contact with the inner surface;
an upper port;
a flow tube integrally formed with the upper port, the flow cavity formed as part of the flow tube, and the venturi nozzle is located in the flow tube;
a pin portion;
at least one fin integrally formed with the pin portion;
a cap portion connected to the at least one fin, the at least one fin and the cap portion position the pin portion in the flow tube;
a front section, and the at least one fin integrally formed with the front section;
a back section connected to the front section, the back section is larger in diameter than the front section;
an outer flange connected to the cap portion; and
an inner flange portion connected to the front section of the pin portion, and the outer flange portion and the inner flange portion are in contact with the inner surface of the flow tube to position the venturi nozzle in the flow tube;
wherein pressurized air flows through the flow cavity, and around the venturi nozzle such that the flow rate of the pressurized air increases, and after the pressurized air flows around the venturi nozzle, the pressurized air is mixed with purge vapor after the pressurized air flows around the pin portion, and the purge vapor enters the flow tube from the upper port in an area of the flow tube downstream of the venturi nozzle.

2. The apparatus of claim 1 , further comprising:
a back surface formed as part of the cap portion; and
a front surface formed as part of the flow tube;
wherein the back surface of the cap portion is in contact with the front surface of the flow tube when the venturi nozzle is disposed within the flow cavity.

3. The apparatus of claim 1 , further comprising:
a large diameter area formed as part of the inlet; and
a small diameter area formed as part of the inlet;
wherein the large diameter area is connected to a conduit and receives the pressurized air, and the small diameter area is in proximity to the back section of the pin portion.

4. The apparatus of claim 3 , wherein the diameter of the small diameter area is between 0.005-0.010 inches larger than the diameter of the back section.

5. The apparatus of claim 1 , further comprising an outlet, a portion of the outlet forming a part of the flow cavity such that the outlet is in fluid communication with the inlet, and the pressurized air and purge vapor are mixed when passing through the outlet.

6. A venturi valve assembly, comprising: a flow tube;
a flow cavity disposed within the flow tube; a venturi nozzle disposed in the flow cavity;
a tapered inlet formed as part of the flow tube, a portion of the venturi nozzle surrounded by and in contact with the tapered inlet; and
an outlet formed as part of the flow tube such that the outlet is in fluid communication with the tapered inlet; a pin portion;
at least one fin connected to the pin portion such that the at least one fin supports the pin portion, locating the venturi nozzle in the tapered inlet;
a large diameter area formed as part of the tapered inlet, the large diameter area being connected to a conduit and receives pressurized air;
a small diameter area formed as part of the tapered inlet, the small diameter area being in proximity to the pin portion;
a front section, the at least one fin integrally formed with the front section; and a back section connected to the front section, the small diameter area being located in proximity to the back section of the pin portion, the back section of the in portion has a larger diameter than the front section of the pin portion;
wherein pressurized air flows into the flow cavity from the tapered inlet such that the pressurized air flows around the venturi nozzle, and the flow rate of the pressurized air is increased after flowing around the venturi nozzle, increasing the flow of purge vapor after the purge vapor is mixed with the pressurized air after the pressurized air flows around the pin portion in the flow cavity in an area of the flow cavity downstream from the venturi nozzle.

7. The venturi valve assembly of claim 6 , further comprising:
a cap portion connected to the front section of the pin portion;
a back surface formed as part of the cap portion; and
a front surface formed as part of the flow tube;
wherein the at least one fin and the cap portion position the pin portion in the flow tube, and the back surface of the cap portion is in contact with the front surface of the flow tube when the venturi nozzle is disposed within the flow cavity.

8. The venturi valve assembly of claim 6 , wherein the small diameter area of the tapered inlet is at least 0.005 inches larger than the diameter of the back section of the pin portion.

9. The venturi valve assembly of claim 6 , the at least one fin further comprising:
an outer flange portion connected to the cap portion; and
an inner flange portion connected to the front section of the pin portion and the outer flange portion;
wherein the outer flange portion and the inner flange portion are in contact with the inner surface of the tapered inlet to locate the venturi nozzle in the flow tube.

10. The venturi valve assembly of claim 6 , wherein a portion of the outlet forms part of the flow cavity, and the pressurized air and purge vapor are mixed when passing through the outlet.

11. The venturi valve assembly of claim 6 , further comprising:
an upper port;
wherein the purge vapor flows from the upper port into an area of the flow cavity downstream of the venturi nozzle.

12. A venturi valve assembly, comprising:
a flow tube;
an upper port integrally formed with flow tube;
a flow cavity disposed within the flow tube;
an inlet formed as part of the flow tube such that the inlet forms a part of the flow cavity;
at least one inner surface being part of the inlet, the at least one inner surface being tapered;
an outlet formed as part of the flow tube such that the outlet forms a part of the flow cavity;
a venturi nozzle disposed in the flow tube, such that at least a portion of the venturi nozzle is in contact with the at least one inner surface;
a pin portion having a front section and a back section;
at least one fin connected to the front section of the pin portion such that the at least one fin supports the pin portion in the flow tube; and
a cap portion connected to the front section of the pin, part of the back surface of the cap portion being in contact with the front surface of the flow tube when the venturi nozzle is positioned in the flow tube, and the back section of the pin portion has a larger diameter than the front section of the pin portion;
wherein pressurized air flows into the flow cavity from the inlet such that the pressurized air flows around the venturi nozzle, and purge vapor flows into the flow cavity from the upper port, and the flow rate of the pressurized air is increased after flowing around the venturi nozzle, increasing the flow of the purge vapor after the purge vapor is mixed with the pressurized air in the flow tube.

13. The venturi valve assembly of claim 12 , further comprising:
a first diameter area formed as part of the inlet; and
a second diameter area formed as part of the inlet;
wherein the first diameter area receives the pressurized air from a conduit, and the second diameter area substantially

Assignees

• Continental automotive systems inc

Inventors

• Balsdon David William
• Williams Binjamin Dominick Manton
• Forgeron David Rene

Classifications

• F02M25/089

  Layout of the fuel vapour installation · CPC title

• Y10T137/87587

  Combining by aspiration · CPC title

• F02M25/0836 Primary

  Arrangement of valves controlling the admission of fuel vapour to an engine, e.g. valve being disposed between fuel tank or absorption canister and intake manifold · CPC title

• B01F25/31243

  Eductor or eductor-type venturi, i.e. the main flow being injected through the venturi with high speed in the form of a jet · CPC title

• F04F5/20

  for evacuating · CPC title