VALVE GEAR FOR ENGINE

• US 20160010517A1
• Filed: 07/10/2015
• Published: 01/14/2016
• Est. Priority Date: 07/11/2014
• Status: Active Grant

• Current Assignee: Suzuki Motor Corporation
• Original Assignee: Suzuki Motor Corporation
• Inventors: YOSHIMOTO, Daisuke, YOKOTA, Shuichi
• Granted Patent: US 9,719,381 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: F01L 1/047 Camshafts
• CPC Class Codes: F01L 1/053 overhead type
• CPC Class Codes: F01L 1/344 changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
• CPC Class Codes: F01L 1/34403 using helically teethed sleeve or gear moving axially between crankshaft and camshaft
• CPC Class Codes: F01L 1/46 Component parts, details, or accessories, not provided for in preceding subgroups
• CPC Class Codes: F01L 2250/02 the camshaft being driven by chains
• CPC Class Codes: F01L 2303/01 Tools for producing, mounting or adjusting, e.g. some part of the distribution
• CPC Class Codes: F01L 2810/02 Lubrication
• CPC Class Codes: F01L 2820/035 Centrifugal forces

Abstract

A valve gear for an engine, includes: a camshaft phase varying device by which a rotational phase of a camshaft for opening/closing valves of the engine can be changed relatively to that of a crankshaft; and a holder that is provided so that the holder can be removably attached to the camshaft in a state where the holder has held constituent components of the camshaft phase varying device.

Claims

1. A valve gear for an engine, comprising:

a camshaft phase varying device by which a rotational phase of a camshaft for opening/closing valves of the engine can be changed relatively to that of a crankshaft; and

a holder that is provided so that the holder can be removably attached to the camshaft in a state where the holder has held constituent components of the camshaft phase varying device.

2. The valve gear for an engine according to claim 1, wherein the constituent components of the camshaft phase varying device comprises:

a driven member that cannot be displaced axially relatively to the camshaft but can be displaced rotationally relatively to the camshaft;

a guide member that is provided rotatably together with the camshaft so that the guide member can be displaced rotationally and axially relatively to the driven member;

a centrifugal weight that is disposed between the driven member and the guide member; and

an urging member that urges the driven member and the guide member so as to make the driven member and the guide member close to each other.

3. The valve gear for an engine according to claim 1, wherein a spline key is provided in the holder, and the guide member is held in the holder so that the guide member can move axially along the spline key.

4. The valve gear for an engine according to claim 2, wherein a spline key is provided in the holder, and the guide member is held in the holder so that the guide member can move axially along the spline key.

5. The valve gear for an engine according to claim 1, wherein the holder is attached to an axial end of the camshaft so that the holder cannot rotate.

6. The valve gear for an engine according to claim 2, wherein the holder is attached to an axial end of the camshaft so that the holder cannot rotate.

7. The valve gear for an engine according to claim 3, wherein the holder is attached to an axial end of the camshaft so that the holder cannot rotate.

8. The valve gear for an engine according to claim 4, wherein the holder is attached to an axial end of the camshaft so that the holder cannot rotate.

9. The valve gear for an engine according to claim 1, wherein an oil passage is provided inside the camshaft, and an oil supply path to the constituent components of the camshaft phase varying device is formed in the holder so as to communicate with the oil passage.

10. The valve gear for an engine according to claim 2, wherein an oil passage is provided inside the camshaft, and an oil supply path to the constituent components of the camshaft phase varying device is formed in the holder so as to communicate with the oil passage.

11. The valve gear for an engine according to claim 3, wherein an oil passage is provided inside the camshaft, and an oil supply path to the constituent components of the camshaft phase varying device is formed in the holder so as to communicate with the oil passage.

12. The valve gear for an engine according to claim 4, wherein an oil passage is provided inside the camshaft, and an oil supply path to the constituent components of the camshaft phase varying device is formed in the holder so as to communicate with the oil passage.

13. The valve gear for an engine according to claim 5, wherein an oil passage is provided inside the camshaft, and an oil supply path to the constituent components of the camshaft phase varying device is formed in the holder so as to communicate with the oil passage.

14. The valve gear for an engine according to claim 1, wherein the oil supply path is formed with a smaller passage sectional area than that of the oil passage and in a position where oil can be supplied to the spline key provided in the holder.

15. The valve gear for an engine according to claim 2, wherein the oil supply path is formed with a smaller passage sectional area than that of the oil passage and in a position where oil can be supplied to the spline key provided in the holder.

16. The valve gear for an engine according to claim 3, wherein the oil supply path is formed with a smaller passage sectional area than that of the oil passage and in a position where oil can be supplied to the spline key provided in the holder.

17. The valve gear for an engine according to claim 4, wherein the oil supply path is formed with a smaller passage sectional area than that of the oil passage and in a position where oil can be supplied to the spline key provided in the holder.

18. The valve gear for an engine according to claim 5, wherein the oil supply path is formed with a smaller passage sectional area than that of the oil passage and in a position where oil can be supplied to the spline key provided in the holder.