Baffle for an exhaust gas pressure sensor assembly

Patent metadata

Field	Value
Publication number	US-11739677-B1
Application number	US-202217806840-A
Country	US
Kind code	B1
Filing date	Jun 14, 2022
Priority date	Jun 14, 2022
Publication date	Aug 29, 2023
Grant date	Aug 29, 2023

Abstract

A baffle of an exhaust gas pressure sensor assembly is disposed at an exhaust manifold of an internal combustion engine and includes an exhaust gas pressure sensor configured to sense a pressure of exhaust gas at the exhaust manifold. The baffle includes a conduit, a plate disposed within the conduit separating the exhaust gas volume into a first portion and a second portion, and a plurality of apertures disposed through the plate and configured to provide fluid communication of the exhaust gas between the first portion of the exhaust gas volume and the second portion of the exhaust gas volume such that each of the plurality of apertures is centered radially outside of an inner passageway to a diaphragm of the exhaust gas pressure sensor.

First claim

What is claimed is:

1. A baffle of an exhaust gas pressure sensor assembly that is disposed at an exhaust manifold of an internal combustion engine and includes an exhaust gas pressure sensor configured to sense a pressure of exhaust gas at the exhaust manifold, the baffle comprising:
a conduit having a conduit axis and being configured to enclose an exhaust gas volume between the exhaust manifold and the exhaust gas pressure sensor of the exhaust gas pressure sensor assembly;
a plate disposed within the conduit separating the exhaust gas volume into a first portion and a second portion and spaced from an end surface of the exhaust gas pressure sensor that is disposed at the second portion of the exhaust gas volume; and
a plurality of apertures disposed through the plate and configured to provide fluid communication of the exhaust gas between the first portion of the exhaust gas volume and the second portion of the exhaust gas volume such that each of the plurality of apertures is centered radially outside of an inner passageway to a diaphragm of the exhaust gas pressure sensor.

2. The baffle of claim 1 , wherein the plate comprises a central portion concentric with and axially spaced from the diaphragm of the exhaust gas pressure sensor; and wherein each of the plurality of apertures is centered radially outside of the central portion.

3. The baffle of claim 1 , wherein each of the plurality of apertures is configured such that the exhaust gas communicated to the second portion of the exhaust gas volume impinges onto the end surface of the exhaust gas sensor of the exhaust gas pressure sensor assembly.

4. The baffle of claim 1 , wherein the plurality of apertures is configured as a circular array of apertures.

5. The baffle of claim 1 , wherein the conduit is configured to enclose the end surface of the exhaust gas sensor.

6. The baffle of claim 1 , wherein the conduit comprises a threaded portion configured to couple the baffle to the exhaust gas sensor.

7. The baffle of claim 1 , wherein each of the plurality of apertures has an aperture diameter that is less than one-third of a conduit diameter of the conduit at the plate.

8. The baffle of claim 1 , wherein each of the plurality of apertures has an aperture area that is greater than one-twentieth of a conduit area of the conduit at the plate.

9. An exhaust gas pressure sensor assembly configured for positioning at an exhaust manifold of an internal combustion engine to sense a pressure of exhaust gas at the exhaust manifold, the assembly comprising:
an exhaust gas pressure sensor having an inner passageway to a diaphragm disposed radially inside of an end surface of the exhaust gas pressure sensor and configured to receive a pressure of the exhaust gas;
a conduit configured to enclose an exhaust gas volume between the exhaust manifold and the exhaust gas pressure sensor;
a plate disposed within the conduit and configured to separate the exhaust gas volume into a first portion and a second portion spaced from the end surface of the exhaust gas pressure sensor that is disposed at the second portion of the exhaust gas volume; and
a plurality of apertures disposed through the plate and configured to provide fluid communication of the exhaust gas between the first portion of the exhaust gas volume and the second portion of the exhaust gas volume such that each of the plurality of apertures is centered radially outside of the inner passageway to the diaphragm of the exhaust gas pressure sensor.

10. The assembly of claim 9 , wherein the plate comprises a central portion concentric with and axially spaced from the diaphragm of the exhaust gas pressure sensor; and wherein each of the plurality of apertures is centered radially outside of the central portion.

11. The assembly of claim 9 , wherein the exhaust gas communicated to the second portion of the exhaust gas volume impinges onto the end surface of the exhaust gas sensor of the exhaust gas pressure sensor assembly.

12. The assembly of claim 9 , wherein the plurality of apertures is configured as a circular array of apertures.

13. The assembly of claim 9 , wherein the conduit is configured to enclose the end surface of the exhaust gas sensor.

14. The assembly of claim 9 , wherein the conduit comprises a threaded portion coupling the baffle to the exhaust gas sensor.

15. The assembly of claim 9 , wherein each of the plurality of apertures has an aperture diameter that is less than one-third of a conduit diameter of the conduit at the plate.

16. The assembly of claim 9 , wherein each of the plurality of apertures has an aperture diameter that is greater than one-tenth of a conduit diameter of the conduit at the plate.

Assignees

• Deere & Co

Inventors

• Lokhande Mahesh B
• Wynthein Paul M
• Slattery Timothy P

Classifications

• G01L19/0636 Primary

  using particle filters · CPC title

• F01N2560/08

  the means being a pressure sensor · CPC title

• F01N13/008 Primary

  Mounting or arrangement of exhaust sensors in or on exhaust apparatus (sensor arrangements for engine control F02D41/1439) · CPC title

• F01N13/10

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

• F01N13/08 Primary

  Other arrangements or adaptations of exhaust conduits {(pipes, joints or supports therefor in general F16L; collecting or removing exhaust gases of vehicle engines in workshops B08B15/00, on highways E01C1/005)} · CPC title