Exhaust nozzle tip device and system

Patent metadata

Field	Value
Publication number	US-9422857-B2
Application number	US-201414573321-A
Country	US
Kind code	B2
Filing date	Dec 17, 2014
Priority date	Dec 17, 2014
Publication date	Aug 23, 2016
Grant date	Aug 23, 2016

Abstract

An exhaust nozzle tip for an exhaust runner conveying a first flow of an exhaust gas includes an inlet, outlet, and nozzle passageway. The inlet receives a second flow of the exhaust gas from an internal combustion engine. The outlet introduces the second flow into the first flow in the exhaust runner. The nozzle passageway conveys the second flow from the inlet to the outlet and is defined by an upstream curved surface, and a downstream surface. The downstream surface includes a first downstream curve, a straight portion, and a second downstream curve. The first downstream curve transitions from perpendicular to the first flow to between 60 degrees and 15 degrees relative to the first flow. The straight portion extends from the first downstream curve. The second downstream curve transitions from the straight portion to a downstream portion of the exhaust runner.

First claim

We claim:

1. An exhaust nozzle tip for an exhaust runner conveying a first flow of an exhaust gas, the exhaust nozzle tip comprising:
an inlet configured to receive a second flow of the exhaust gas from an internal combustion engine;
an outlet configured to introduce the second flow of the exhaust gas into the first flow of the exhaust gas in the exhaust runner; and
a nozzle passageway configured to convey the second flow of the exhaust gas from the inlet to the outlet, the nozzle passageway being defined by an upstream curved surface and a downstream surface, the upstream curved surface being a continuous curve from perpendicular to the first flow to between 60 degrees and 15 degrees relative to the first flow, the downstream surface including:
a first downstream curve transitioning from perpendicular to the first flow to between 60 degrees and 15 degrees relative to the first flow;
a straight portion extending from the first downstream curve; and
a second downstream curve transitioning from the straight portion to a downstream portion of the exhaust runner, wherein the second downstream curve has a side portion that continues along a line defined by the straight portion, wherein the second flow of the exhaust gas is introduced into the first flow of the exhaust gas while maintaining a velocity of the first flow of the exhaust gas.

2. The exhaust nozzle tip according to claim 1 , further comprising:
a diverging zone beginning at the first downstream curve, wherein the downstream surface diverges from the upstream curved surface to increase a cross sectional area of the nozzle passageway.

3. The exhaust nozzle tip according to claim 1 , further comprising:
an engine flange having a plurality of bores for passage of a respective plurality of bolts for securing the exhaust nozzle tip to the internal combustion engine.

4. The exhaust nozzle tip according to claim 1 , further comprising:
a runner flange configured to mate with a runner cutout of the exhaust runner.

5. The exhaust nozzle tip according to claim 4 , wherein the runner flange is welded into the runner cutout.

6. An exhaust assembly for an internal combustion engine, the exhaust assembly comprising:
an exhaust runner configured to convey a first flow of exhaust gas to a turbocharger; and
an exhaust nozzle tip to fluidly connect the internal combustion engine to the exhaust runner, the exhaust nozzle tip including:
an inlet configured to receive a second flow of an exhaust gas from an internal combustion engine;
an outlet configured to introduce the second flow of the exhaust gas into the first flow of the exhaust gas in the exhaust runner; and
a passageway configured to convey the second flow of the exhaust gas from the inlet to the outlet, the passageway being defined by an upstream curved surface and a downstream surface, the upstream curved surface being a continuous curve from perpendicular to the first flow to between 60 degrees relative to the first flow and 15 degrees relative to the first flow, the downstream surface having:
a first downstream curve transitioning from perpendicular to the first flow to between 60 degrees relative to the first flow and 15 degrees relative to the first flow;
a straight portion extending from the first downstream curve; and
a second downstream curve transitioning from the straight portion to a downstream portion of the exhaust runner, wherein the second downstream curve has a side portion that continues along a line defined by the straight portion, wherein the second flow of an exhaust gas is introduced into the first flow of the exhaust gas while maintaining a velocity of the first flow of the exhaust gas.

7. The exhaust assembly according to claim 6 , further comprising:
a diverging zone beginning at the first downstream curve, wherein the downstream surface diverges from the upstream curved surface to increase a cross sectional area of the passageway.

8. The exhaust assembly according to claim 6 , further comprising:
an engine flange having a plurality of bores for passage of a respective plurality of bolts for securing the exhaust nozzle tip to the internal combustion engine.

9. The exhaust assembly according to claim 6 , further comprising:
a water jacket disposed about the exhaust runner and configured to receive a flow of water therethrough.

10. The exhaust assembly according to claim 9 , further comprising:
an air gap disposed between the exhaust runner and the water jacket to reduce a thermal transfer of heat from the exhaust runner to the flow of water in the water jacket.

11. The exhaust assembly according to claim 6 , further comprising:
a runner flange configured to mate with a runner cutout of the exhaust runner.

12. The exhaust assembly according to claim 11 , wherein the runner flange is welded into the runner cutout.

13. A power supply comprising:
an internal combustion engine;
an air system to deliver air to the internal combustion engine;
an exhaust assembly for the internal combustion engine, the exhaust assembly including
an exhaust runner configured to convey a first flow of exhaust gas to a turbocharger, and
an exhaust nozzle tip to fluidly connect the internal combustion engine to the exhaust runner, the exhaust nozzle tip having:
an inlet configured to receive a second flow of an exhaust gas from an internal combustion engine;
an outlet configured to introduce the second flow of the exhaust gas into the first flow of the exhaust gas in the exhaust runner; and
a passageway configured to convey the second flow of the exhaust gas from the inlet to the outlet, the passageway being defined by an upstream curved surface and a downstream surface, the upstream curved surface being a continuous curve from perpendicular to the first flow to between 60 degrees relative to the first flow and 15 degrees relative to the first flow, the downstream surface having:
a first downstream curve transitioning from perpendicular to the first flow to between 60 degrees relative to the first flow and 15 degrees relative to the first flow;
a straight portion extending from the first downstream curve; and
a second downstream curve transitioning from the straight portion to a downstream portion of the exhaust runner, wherein the second downstream curve has a side portion that continues along a line defined by the straight portion, wherein the second flow of an exhaust gas is introduced into the first flow of the exhaust gas while maintaining a velocity of the first flow of the exhaust gas.

14. The power supply according to claim 13 , further comprising:
a diverging zone beginning at the first downstream curve, wherein the downstream surface diverges from the upstream curved surface to increase a cross sectional area of the passageway.

15. The power supply according to claim 13 , further comprising:
an engine flange having a plurality of bores for passage of a respective plurality of bolts for securing the exhaust nozzle tip to the internal combustion engine.

16. The power supply according to claim 13 , further comprising:
a plurality of exhaust nozzle tips corresponding to a plurality of cylinders in the internal combustion engine.

17. The power supply according to claim 13 , further comprising:
a water jacket disposed about the exhaust runner and configured to receive a flow of water therethrough.

18. The power supply according to claim 17 , further comprising:
an air gap disposed between the exhaust runner and the water jacket to reduce a thermal transfer of heat from the exhaust runner to the flow

Assignees

• Caterpillar Inc

Inventors

• Mchenry Ryan
• Maloney Ronald
• Gaarder Andrew
• Reed Christopher
• Kress Lee

Classifications

• F01N13/10

  of exhaust manifolds {(with cooling jacket F01N3/046)} · CPC title

• F01N13/102

  having thermal insulation · CPC title

• F02B37/02 Primary

  Gas passages between engine outlet and pump drive, e.g. reservoirs · CPC title

• F01N13/1855

  the connection being realised by using bolts, screws, rivets or the like · CPC title

• F01N3/046

  Exhaust manifolds with cooling jacket · CPC title