Oxygen sensor bung of motor vehicle exhaust pipe

• US 20120096839A1
• Filed: 10/26/2010
• Published: 04/26/2012
• Est. Priority Date: 10/26/2010
• Status: Active Grant

• Current Assignee: Liang Fei Industry Co., Ltd.
• Original Assignee: Liang Fei Industry Co., Ltd.
• Inventors: Chang, Chin-Chuan
• Granted Patent: US 8,459,004 B2
• Time in Patent Office: Days
• 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 at least a base, a catalytic converter and a seal lid, wherein:

the base includes an external connection section at one end that contains a first chamber and is fastened to a holding seat of an exhaust pipe and another end containing a second chamber to hold a sensor head of an oxygen sensor;

the catalytic converter is held in the first chamber and includes a barrel casing which houses a beehive structure made of precious metal; and

the seal lid has at least one opening and is fastened to the base to confine the catalytic converter.

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 coupled together sideward.

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 catalytic converter.

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.