Oxygen sensor bung of motor vehicle exhaust pipe

• US 8,459,004 B2
• Filed: 10/26/2010
• Issued: 06/11/2013
• Est. Priority Date: 10/26/2010
• Status: Expired due to Fees

• Current Assignee: Liang Fei Industry Co., Ltd.
• Original Assignee: Liang Fei Industry Co., Ltd.
• Inventors: Chang, Chin-Chuan
• Primary Examiner(s): Tran, Binh Q
• Application Number:
  US12/926,088
• Publication Number:
  US 20120096839A1
• Time in Patent Office: 959 Days
• Field of Search: 602/76, 602/77, 602/85, 602/99, 204/157.5, 204/157.78, 204/157.89, 204/424, 204/431
• US Class Current: 60/276
• CPC Class Codes: F01N 11/007 the diagnostic devices measuring oxygen or air concentration downstream of the exhaust apparatus
• 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 2560/025 for measuring or detecting O2, e.g. lambda sensors
• CPC Class Codes: Y02T 10/40 Engine management systems

Abstract

An oxygen sensor bung of motor vehicle exhaust pipe comprises at least a base, a catalytic converter and a seal lid. The base has an external connection section at one end that contains a first chamber to hold the catalytic converter and is fastened by the seal lid. The external connection section has a first external thread on the surface to fasten to a holding seat of an exhaust pipe. The base has a second chamber on another end with a third internal screw hole formed inside to hold an oxygen sensor by fastening with a second external thread formed thereon. The catalytic converter includes a barrel type casing containing a beehive structure made of precious metal to increase exhaust gas process area. Therefore impurities in the exhaust gas can be reduced and timely replacement of the catalytic converter can be accomplished, and accurate detection of oxygen content can be achieved.

Claims

1. An oxygen sensor bung of motor vehicle exhaust pipe comprising:

a base having a first base end and a second base end, an external connection section and a first chamber are located in the first base end and a second chamber is located on the second base end and communicating with the first chamber, an oxygen sensor is removably connected to the second base end and a sensor head of the oxygen sensor is located in the second chamber, the first base end of the base is removable connected to a holding seat of an exhaust pipe;

a catalytic converter removably inserted into the first chamber, the catalytic converter having a barrel casing housing a beehive structure made of precious metal; and

a seal lid having at least one opening and removably connected to the first base end of the base selectively fixing the catalytic converter in the first chamber.

2. The oxygen sensor bung of motor vehicle exhaust pipe of claim 1, wherein the base includes a first duct bung and a second duct bung threadedly connected together, an axis of the first duct bung is located perpendicular to an axis of the second duct bung.

3. The oxygen sensor bung of motor vehicle exhaust pipe of claim 1, wherein the external connection section has a first internal screw hole formed on an inner wall thereof.

4. The oxygen sensor bung of motor vehicle exhaust pipe of claim 1, wherein the external connection section has a first external thread formed on the surface thereof.

5. The oxygen sensor bung of motor vehicle exhaust pipe of claim 1, wherein the second chamber has a third screw hole fastened to a second external thread formed on the oxygen sensor.

6. The oxygen sensor bung of motor vehicle exhaust pipe of claim 1, wherein the seal lid has a third external thread fastened to a first internal screw hole formed on the base.