Engine unit

Patent metadata

Field	Value
Publication number	US-9863295-B2
Application number	US-201514608315-A
Country	US
Kind code	B2
Filing date	Jan 29, 2015
Priority date	Jul 18, 2014
Publication date	Jan 9, 2018
Grant date	Jan 9, 2018

Abstract

An engine unit includes an engine body, a crankshaft, and an oil tank. The engine body includes a cylinder unit and a crankcase. The crankshaft is accommodated in the crankcase and extends in the horizontal or substantially horizontal direction. The oil tank is located at a lateral portion of the engine body. The oil tank includes a tank body, a first component, and a second component. The first component is separate from the tank body and is joined to the tank body. The second component is separate from the tank body and is joined to the tank body. A first joint surface between the tank body and the first component extends in a direction different from that of a second joint surface between the tank body and the second component.

First claim

What is claimed is:

1. An engine unit comprising: an engine body including a cylinder unit and a crankcase; a crankshaft accommodated in the crankcase and extending in a horizontal or substantially horizontal direction; an oil pan disposed under the crankcase; and an oil tank located at a lateral portion of the engine body, the oil tank including a tank body, a lower oil chamber partitioned from the oil pan, a first component, and a second component; wherein the first component is separate from the tank body and joined to the tank body, the second component is separate from the tank body and joined to the tank body so as to define a lower surface of the lower oil chamber, and a first joint surface between the tank body and the first component extends in a first direction different from a second direction in which a second joint surface between the tank body and the second component extends; and the second component is integral with the oil pan.

2. The engine unit according to claim 1 , wherein the tank body includes an opening in a lateral surface of the tank body in a horizontal or substantially horizontal direction, and the first component covers the opening of the lateral surface of the tank body.

3. The engine unit according to claim 2 , wherein the tank body includes a guide plate extending in the horizontal or substantially horizontal direction.

4. The engine unit according to claim 2 , wherein the tank body includes an oil path extending in the horizontal or substantially horizontal direction.

5. The engine unit according to claim 1 , wherein the tank body includes a first body portion and a second body portion separate from the first body portion and joined to the first body portion.

6. The engine unit according to claim 5 , wherein the first body portion includes an opening in a bottom surface of the first body portion, the second body portion is disposed under the first body portion, the second body portion includes an opening in an upper surface of the second body portion, and the second body portion covers the opening in the bottom surface of the first body portion.

7. The engine unit according to claim 5 , wherein the first body portion is integral and unitary with the cylinder unit.

8. The engine unit according to claim 5 , wherein the second body portion is integral and unitary with the crankcase.

9. The engine unit according to claim 1 , wherein the tank body includes an opening in a bottom surface of the tank body, and the second component covers the opening in the bottom surface of the tank body.

10. The engine unit according to claim 1 , wherein the oil tank has a shape elongated in an up-and-down direction.

11. The engine unit according to claim 1 , wherein the first direction of the first joint surface is orthogonal or substantially orthogonal to the second direction of the second joint surface.

12. The engine unit according to claim 1 , wherein the first direction of the first joint surface is vertical or approximately vertical, and the second direction of the second joint surface is horizontal or approximately horizontal.

13. The engine unit according to claim 1 , wherein the first joint surface and the second joint surface are spaced apart from each other.

14. The engine unit according to claim 1 , wherein the tank body includes a first body portion and a second body portion disposed under the first body portion and joined to the first body portion;
the first body portion includes an opening in a lateral surface thereof;
the first component covers the opening in the lateral surface of the first body portion;
the first body portion includes an opening in a bottom surface thereof;
the second body portion includes an opening in an upper surface thereof;
the second body portion covers the opening in the bottom surface of the first body portion;
the second body portion includes an opening in a bottom surface thereof; and
the second component covers the opening in the bottom surface of the second body portion.

15. The engine unit according to claim 14 , wherein the first body portion is integral and unitary with the cylinder unit, and the second body portion is integral and unitary with the crankcase.

16. The engine unit according to claim 1 , wherein the first component is a plate shaped member joined to a rear surface of the tank body.

17. The engine unit according to claim 3 , wherein the tank body includes a first body portion including an upper oil chamber inside the first body portion, and the guide plate divides the upper oil chamber into a first chamber, a second chamber, and a third chamber.

18. The engine unit according to claim 5 , wherein the first component is joined to the first body portion but not the second body portion.

19. A vehicle comprising: an engine unit; and a vehicle body connected to the engine unit; wherein the engine unit includes: an engine body including a cylinder unit and a crankcase; a crankshaft accommodated in the crankcase and extending in a horizontal direction; an oil pan disposed under the crankcase; and an oil tank located at a lateral portion of the engine body, the oil tank including a tank body, a lower oil chamber partitioned from the oil pan, a first component, and a second component; wherein the first component is separate from the tank body and joined to the tank body, the second component is separate from the tank body and joined to the tank body so as to define a lower surface of the lower oil chamber, and a first joint surface between the tank body and the first component extends in a first direction different from a second direction in which a second joint surface between the tank body and the second component extends; and the second component is integral with the oil pan.

Assignees

• Yamaha Motor Co Ltd

Inventors

• Harada Naoki

Classifications

• F01M2011/0095

  Supplementary oil tank · CPC title

• F01M2001/126

  Dry-sumps · CPC title

• F02F7/006

  Camshaft or pushrod housings · CPC title

• F01M11/0004 Primary

  Oilsumps · CPC title

• F02F1/108

  Siamese-type cylinders, i.e. cylinders cast together · CPC title