Oxygen sensor heat sinking boss

• US 9,057,315 B2
• Filed: 08/01/2013
• Issued: 06/16/2015
• Est. Priority Date: 07/08/2013
• Status: Active Grant

• Current Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Original Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Inventors: Frijas, Rodney M.
• Primary Examiner(s): Denion, Thomas
• Assistant Examiner(s): LEON JR, JORGE LUIS
• Application Number:
  US13/956,971
• Publication Number:
  US 20150007554A1
• Time in Patent Office: 684 Days
• Field of Search: 602/76, 602/85, 603/20, 738/665
• US Class Current: 1/1
• CPC Class Codes: F01N 13/008 Mounting or arrangement of exhaust sensors in or on exhaust apparatus sensor arrangements for engine control F02D41/1439
• CPC Class Codes: F01N 2260/022 using air
• CPC Class Codes: F01N 2260/20 for heat or sound protection, e.g. using a shield or specially shaped outer surface of exhaust device
• CPC Class Codes: F01N 2560/025 for measuring or detecting O2, e.g. lambda sensors
• CPC Class Codes: F01N 2590/04 for motorcycles
• CPC Class Codes: F02D 41/1439 characterised by the position of the sensor
• CPC Class Codes: G01D 11/30 Supports specially adapted for an instrument; Supports specially adapted for a set of instruments

Abstract

A vehicle having an engine is disclosed. The vehicle includes an exhaust pipe receiving exhaust gas from the engine and a muffler connected to the exhaust pipe. An oxygen concentration sensor is disposed in a boss defining a port in the exhaust pipe. The boss includes a diameter greater than a widest dimension of the oxygen concentration sensor which may be in the form of a fin.

Claims

1. An exhaust tube comprising an elongated tube defining an exhaust passage, a port formed in a sidewall of said elongated tube and shaped to receive a sensor, said port comprising a neck region defining an interior passage extending outwardly from said tube, said neck region including at least two radially projecting fins, wherein said radially projecting fins have different diameters.

2. The exhaust tube of claim 1, wherein said radially projecting fins are oriented in a plane transverse to a longitudinal axis of said interior passage.

3. The exhaust tube of claim 1, wherein a first fin is located closer to said elongated tube than a second fin and wherein said second fin has a diameter greater than said first fin.

4. The exhaust tube of claim 1, wherein the elongated tube includes a first region of a substantially constant diameter and a second region including a transition region suitable for engaging a muffler, said port being located in said transition region.

5. The exhaust tube of claim 1, wherein said fin comprises a disc shaped body located at an edge of said neck region remote from the exhaust tube.

6. The exhaust tube of claim 1, wherein said interior passage is threaded.

7. The exhaust tube of claim 1, including a temperature shielding wrap around the elongated tube.

8. A gas sensor mounting structure comprising a boss welded to an exhaust tube, said boss defining a threaded interior passage surface for receiving an associated gas sensor, said boss further including at least two radially projecting fins wherein a first of said fins has a diameter greater than a diameter of a second of said fins.

9. The mounting structure of claim 8, wherein said fins are substantially disc-shaped and oriented in a plane transverse to a longitudinal axis of the interior passage.

10. The mounting structure of claim 8, wherein said second fin is located closer to said exhaust tube than said first fin.

11. An all-terrain vehicle having an engine, said all-terrain vehicle comprising:

an exhaust pipe receiving exhaust gas from the engine;

a muffler connected to said exhaust pipe; and

an oxygen concentration sensor disposed in a boss defining a port in said exhaust pipe, said oxygen concentration sensor penetrating a length of a longitudinal axis of said boss such that an end of the oxygen concentration sensor enters an interior of the exhaust pipe, and wherein said boss includes at least two fins oriented transverse to said longitudinal axis and wherein a fin located further from said exhaust pipe has a diameter greater than a diameter of a fin located closer to said exhaust pipe.

12. The all-terrain vehicle of claim 11, wherein said longitudinal axis is oriented substantially geographically horizontally.

13. The all-terrain vehicle of claim 11, wherein the fin located further from said exhaust pipe is located at a terminus of the boss remote from the exhaust pipe.

14. The all-terrain vehicle of claim 11, wherein said boss includes a main body having a main body diameter adjacent and external to the exhaust pipe and wherein said fins have diameters greater than the main body diameter.