INTERNAL COMBUSTION ENGINE WITH BREATHER CHAMBER

• US 20090071421A1
• Filed: 09/15/2008
• Published: 03/19/2009
• Est. Priority Date: 09/18/2007
• Status: Active Grant

• Current Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Original Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Inventors: Maehara, Hayato, Hirayama, Taku
• Granted Patent: US 7,673,620 B2
• Time in Patent Office: Days
• US Class Current: 123/41.860
• CPC Class Codes: F01L 1/053 overhead type
• CPC Class Codes: F01L 1/143 for use with overhead camshafts
• CPC Class Codes: F01L 13/0031 by modification of tappet or pushrod length
• CPC Class Codes: F01M 13/0416 arranged in valve-covers
• CPC Class Codes: F02F 7/006 Camshaft or pushrod housings
• CPC Class Codes: F02M 35/10222 Exhaust gas recirculation [EGR]; Positive crankcase ventilation [PCV]; Additional air admission, lubricant or fuel vapour admission
• CPC Class Codes: F02M 35/162 Motorcycles; All-terrain vehicles, e.g. quads, snowmobiles; Small vehicles, e.g. forklifts

Abstract

A cylinder head cover, on which a breather chamber wall and control valve device are mounted is not enlarged while the capacity of a breather chamber is increased. For an internal combustion engine, control valve devices, which control the operation of a hydraulic valve stop mechanism that serves as a cylinder stop mechanism, and an outer chamber wall of a breather chamber wall that forms a breather chamber into which a blow-by gas flows, project in a predetermined direction and are mounted on the outer surface of a top wall of a cylinder head cover. When viewed in the predetermined direction, the outer chamber wall has an overlap section that overlaps with a part of the control valve device. Therefore, the overlap section is covered in the particular direction by the control valve device.

Claims

1. An internal combustion engine comprising:

an operation control unit for controlling the operation of an operation control mechanism, which controls an engine operating state; and

a breather chamber wall for forming a breather chamber into which a blow-by gas flows;

the operation control unit and the breather chamber wall projecting in a particular direction and positioned on the outer surface of an engine main body;

wherein the breather chamber wall includes an overlap section that overlaps with a part of the operation control unit when viewed in the particular direction.

2. The internal combustion engine according to claim 1, wherein the overlap section is covered in the particular direction by the operation control unit.

3. The internal combustion engine according to claim 1, wherein the breather chamber wall has a concaved section that is shaped along the outline of the operation control unit and the overlap section is the concaved section.

4. The internal combustion engine according to claim 2, wherein the breather chamber wall has a concaved section that is shaped along the outline of the operation control unit and the overlap section is the concaved section.

5. The internal combustion engine according to claim 1, wherein the engine main body has a plurality of cylinders and the operation control mechanism is a cylinder stop mechanism for stopping some of the plurality of cylinders.

6. The internal combustion engine according to claim 2, wherein the engine main body has a plurality of cylinders and the operation control mechanism is a cylinder stop mechanism for stopping some of the plurality of cylinders.

7. The internal combustion engine according to claim 3, wherein the engine main body has a plurality of cylinders and the operation control mechanism is a cylinder stop mechanism for stopping some of the plurality of cylinders.

8. The internal combustion engine according to claim 4, wherein the engine main body has a plurality of cylinders and the operation control mechanism is a cylinder stop mechanism for stopping some of the plurality of cylinders.

9. The internal combustion engine according to claim 1, and further comprising:

an air cleaner;

wherein the outer surface is an outer surface of a top wall of a cylinder head cover that constitutes the engine main body; and

the operation control unit and the breather chamber wall are positioned in a space formed between the air cleaner and the cylinder head cover.

10. The internal combustion engine according to claim 2, and further comprising:

an air cleaner;

wherein the outer surface is an outer surface of a top wall of a cylinder head cover that constitutes the engine main body; and

the operation control unit and the breather chamber wall are positioned in a space formed between the air cleaner and the cylinder head cover.

11. The internal combustion engine according to claim 3, and further comprising:

an air cleaner;

wherein the outer surface is an outer surface of a top wall of a cylinder head cover that constitutes the engine main body; and

the operation control unit and the breather chamber wall are positioned in a space formed between the air cleaner and the cylinder head cover.

12. The internal combustion engine according to claim 4, and further comprising:

an air cleaner;

wherein the outer surface is an outer surface of a top wall of a cylinder head cover that constitutes the engine main body; and

the operation control unit and the breather chamber wall are positioned in a space formed between the air cleaner and the cylinder head cover

13. The internal combustion engine according to claim 5, and further comprising:

an air cleaner;

wherein the outer surface is an outer surface of a top wall of a cylinder head cover that constitutes the engine main body; and

the operation control unit and the breather chamber wall are positioned in a space formed between the air cleaner and the cylinder head cover.

14. An operation control unit for controlling the operation of an operation control mechanism for controlling an engine operating state comprising:

a breather chamber wall for forming a breather chamber into which a blow-by gas flows;

said operation control unit and the breather chamber wall projecting in a predetermined direction and positioned on the outer surface of an engine main body; and

an overlap section formed in the breather chamber wall for overlapping with a part of the operation control unit when viewed in the predetermined direction.

15. The operation control unit according to claim 14, wherein the overlap section is covered in the predetermined direction by the operation control unit.

16. The operation control unit according to claim 14, wherein the breather chamber wall has a concaved section that is shaped along the outline of the operation control unit and the overlap section is the concaved section.

17. The operation control unit according to claim 14, wherein the engine main body has a plurality of cylinders and the operation control mechanism is a cylinder stop mechanism for stopping some of the plurality of cylinders.

18. The operation control unit according to claim 15, wherein the engine main body has a plurality of cylinders and the operation control mechanism is a cylinder stop mechanism for stopping some of the plurality of cylinders.

19. The operation control unit according to claim 16, wherein the engine main body has a plurality of cylinders and the operation control mechanism is a cylinder stop mechanism for stopping some of the plurality of cylinders. comprising:

an air cleaner;

wherein the outer surface is an outer surface of a top wall of a cylinder head cover that constitutes the engine main body; and

the operation control unit and the breather chamber wall are positioned in a space formed between the air cleaner and the cylinder head cover.