Cyclonic thermal diffuser and method

Patent metadata

Field	Value
Publication number	US-10001048-B2
Application number	US-201615075480-A
Country	US
Kind code	B2
Filing date	Mar 21, 2016
Priority date	Mar 21, 2016
Publication date	Jun 19, 2018
Grant date	Jun 19, 2018

Abstract

A diffuser is configured for use on a vehicle having an engine and an exhaust pipe. The diffuser includes a conduit with a first end configured to receive exhaust gases from the engine. A diffusion fitting is coupled to a second end of the conduit to receive exhaust gases discharged from the conduit. The diffusion fitting has an outer wall that includes a curved surface. The curved surface is configured to guide the exhaust gases discharged from the conduit about an axis so that exhaust gases exit a first side of the diffusion fitting rotating about the axis.

First claim

The invention claimed is:

1. A diffuser for a vehicle having an engine and an exhaust pipe, comprising:
(a) a conduit, a first end of the conduit being configured to receive exhaust gases from the engine; and
(b) a diffusion fitting coupled to the conduit and in fluid communication with a second end of the conduit to receive exhaust gases discharged from the conduit, the diffusion fitting comprising:
(i) an outer wall, the outer wall comprising a curved surface; and
(ii) a frustoconical inner wall at least partially disposed within the outer wall and defining a central passage, the central passage having an inlet and an outlet, the outlet being smaller than the inlet,

wherein the diffusion fitting is configured so that exhaust gases are discharged from the conduit between the inner and outer walls, the inner and outer walls guiding the exhaust gases about an axis so that the exhaust gases exit a first side of the diffusion fitting rotating about the axis, the exhaust gases entraining ambient air through the central passage from the inlet through the outlet.

2. The diffuser of claim 1 , the diffusion fitting further comprising a base extending from the outer wall to the inner wall at a second side of the diffusion fitting, the base preventing exhaust gases from exiting the second side of the diffusion fitting.

3. The diffuser of claim 2 , wherein the inner wall, the outer wall, and the base cooperate to define a three-sided channel.

4. The diffuser of claim 3 , wherein the three-sided channel extends around the axis.

5. The diffuser of claim 1 , wherein the diffusion fitting is in fluid connection with an area surrounding a vehicle component, wherein the diffusion fitting is configured to generate a flow of ambient air past the component.

6. A diffuser for a vehicle having an engine and an exhaust pipe, comprising:
(a) a conduit, a first end of the conduit being configured to receive exhaust gases from the engine; and
(b) a diffusion fitting coupled to the conduit and in fluid communication with a second end of the conduit to receive exhaust gases discharged from the conduit, the diffusion fitting comprising a channel configured to direct the exhaust gases along an arcuate path about an axis, the channel defining a passageway extending through the diffusion fitting, the passageway having an inlet and an outlet, the outlet being smaller than the inlet, wherein the passageway is configured to entrain ambient air through the passageway, wherein the exhaust gases are discharged from the conduit into the diffusion fitting in a direction normal to the axis.

7. The diffuser of claim 6 , wherein a portion of the channel is at least partially defined by a frustoconical surface.

8. The diffuser of claim 7 , wherein the passageway extends through the frustoconical surface.

9. The diffuser of claim 7 , wherein the channel is a three-sided channel comprising an inner wall connected to an outer wall by a base, the inner wall being defined by the frustoconical surface.

10. The diffuser of claim 9 , wherein the three-sided channel has a cross-section in a form of a truncated “V.”

Assignees

• Smith Jeffrey P
• Paccar Inc

Inventors

• Smith Jeffrey P

Classifications

• F01N2470/08

  Exhaust gas passages being formed between the walls of an outer shell and an inner chamber · CPC title

• F01N1/087

  using tangential inlets into a circular chamber · CPC title

• F01N2490/16

  Chambers with particular shapes, e.g. spherical · CPC title

• F01N2470/10

  Tubes having non-circular cross section · CPC title

• F01N1/12

  using spirally or helically shaped channels (cyclones B04C) · CPC title