EXHAUST SYSTEM STRUCTURE OF INTERNAL COMBUSTION ENGINE

• US 20180149065A1
• Filed: 11/24/2017
• Published: 05/31/2018
• Est. Priority Date: 11/25/2016
• Status: Abandoned Application

• Current Assignee: Mitsubishi Jidosha Kogyo Kabushiki Kaisha
• Original Assignee: Mitsubishi Jidosha Kogyo Kabushiki Kaisha
• Inventors: KAWAKAMI, Nobuhiro, KIDO, Yusuke, HORI, Sumito
• Application Number:
  US15/821,949
• Publication Number:
  US 20180149065A1
• Time in Patent Office: Days
• 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 13/10 of exhaust manifolds with cooling jacket F01N3/046
• CPC Class Codes: F01N 13/105 having the form of a chamber directly connected to the cylinder head, e.g. without having tubes connected between cylinder head and chamber
• CPC Class Codes: F01N 13/1855 the connection being realised by using bolts, screws, rivets or the like
• 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 2340/02 characterised by the distance of the apparatus to the engine, or the distance between two exhaust treating apparatuses
• CPC Class Codes: F01N 2450/22 by welding or brazing
• CPC Class Codes: F01N 2450/24 by bolts, screws, rivets or the like

Abstract

An exhaust system structure of an internal combustion engine, includes an exhaust manifold which is configured to be connected to a cylinder of the internal combustion engine, an exhaust pipe which is provided on a downstream side of an exhaust flow from the exhaust manifold, a connection member including a flange portion which connects the exhaust pipe and the exhaust manifold to each other and a boss portion which is provided integrally with the flange portion and is fixed to a portion of an outer circumferential surface of the exhaust pipe, a sensor which is attached to the boss portion and is configured to detect components of the exhaust, and a purification device which is connected to a downstream end of the exhaust pipe and is disposed on a side opposite to the boss portion with respect to the exhaust pipe.

Claims

1. An exhaust system structure of an internal combustion engine, comprising:

an exhaust manifold which is configured to be connected to a cylinder of the internal combustion engine;

an exhaust pipe which is provided on a downstream side of an exhaust flow from the exhaust manifold;

a connection member including a flange portion which connects the exhaust pipe and the exhaust manifold to each other and a boss portion which is provided integrally with the flange portion and is fixed to a portion of an outer circumferential surface of the exhaust pipe;

a sensor which is attached to the boss portion and is configured to detect components of the exhaust; and

a purification device which is connected to a downstream end of the exhaust pipe and is disposed on a side opposite to the boss portion with respect to the exhaust pipe.

2. The exhaust system structure of an internal combustion engine according to claim 1,

wherein the boss portion has a cylindrical shape which has an axis parallel to a direction in which a cylinder head and a cylinder block of the internal combustion engine are arranged in parallel, and

wherein the sensor is attached along the axis of the boss portion.

3. The exhaust system structure of an internal combustion engine according to claim 1,

wherein the purification device has a case which extends in the same direction as the direction in which the cylinder head and the cylinder block of the internal combustion engine are arranged in parallel.

4. The exhaust system structure of an internal combustion engine according to claim 1,

wherein the purification device is provided to be overhung toward a side of the internal combustion engine from the connection member.

5. The exhaust system structure of an internal combustion engine according to claim 1,

wherein the exhaust manifold is built in the cylinder head of the internal combustion engine.

6. The exhaust system structure of an internal combustion engine according to claim 1, further comprising:

a sensor cover for surrounding the outer circumference of the sensor to block heat,

wherein a portion of the sensor cover is interposed between the sensor and the boss portion of the connection member.