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Valve timing control device of internal combustion engine

Imported: 24 Feb '17 | Published: 06 Jan '04

Masahiko Watanabe, Tamotsu Todo

USPTO - Utility Patents

Abstract

A first stopper device is arranged between an output element of a planetary gear unit and a drive rotation member driven by an output shaft of an engine. The first stopper device stops a relative rotation therebetween when a relative rotation angle therebetween comes to a first predetermined degree. A second stopper device may be arranged between a free element of the planetary gear unit and an input element of the planetary gear unit. The second stopper device stops a relative rotation therebetween when a relative rotation angle therebetween comes to a second predetermined degree.

Description

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a sectional view of a valve timing control device of a first embodiment of the present invention;

FIG. 2 is an exploded view of the valve timing control device of the first embodiment;

FIG. 3 is a sectional view taken along line III—III of FIG. 1, showing one operation condition of the valve timing control device of the first embodiment;

FIG. 4 is a view similar to FIG. 3, but showing a different operation condition of the valve timing control device of the first embodiment;

FIG. 5 is an enlarged view of a part indicated by an arrow “V” in FIG. 1;

FIG. 6 is a view of a part indicated by an arrow “VI” in FIG. 1;

FIG. 7 is a sectional view of a valve timing control device of a second embodiment of the present invention;

FIG. 8 is a sectional view taken along the line VIII—VIII of FIG. 7, showing one operation condition of the valve timing control device of the second embodiment;

FIG. 9 is an exploded view of the valve timing control device of the second embodiment;

FIG. 10 is a sectional view taken along the line X—X of FIG. 7;

FIG. 11 is a view similar to FIG. 8, but showing another operation condition of the valve timing control device of the second embodiment;

FIG. 12 is a view similar to FIG. 8, but showing still another operation condition of the valve timing control device of the second embodiment;

FIG. 13 is an enlarged sectional view of a modified stopper device of the valve timing control device of the second embodiment of the present invention; and

FIG. 14 is a sectional view taken along the line XIV—XIV of FIG.

13.

Claims

1. A valve timing control device of an internal combustion engine, comprising:

2. A valve timing control device as claimed in claim 1, further comprising a second stopper device arranged between said free element and said input element, said second stopper device stopping a relative rotation therebetween when the relative rotation angle therebetween comes to a second predetermined degree.

3. A valve timing control device as claimed in claim 1, in which said relative angle control mechanism comprises:

4. A valve timing control device of an internal combustion engine, comprising:

5. A valve timing control device as claimed in claim 4, in which said carrier plate constitutes said input element, one of said sun gear and said ring gear constitutes said output element and the other of said sun gear and said ring gear constitutes said free element.

6. A valve timing control device as claimed in claim 5, further comprising:

7. A valve timing control device as claimed in claim 4, in which said first stopper device comprises:

8. A valve timing control device as claimed in claim 7, in which said second stopper device comprises:

9. A valve timing control device as claimed in claim 7, in which at least one of said first and second members is constructed of a shock absorbing material for absorbing a shock produced when said first and second members contact with each other.

10. A valve timing control device as claimed in claim 8, in which at least one of said third and fourth members is constructed of a shock absorbing member for absorbing a shock produced when said third and fourth members contact with each other.

11. A valve timing control device of an internal combustion engine, comprising:

12. A valve timing control device as claimed in claim 11, in which at least one of the first and second members is constructed of a shock absorbing material for absorbing a shock produced when said first and second members contact with each other.

13. A valve timing control device as claimed in claim 11, in which said first and second members are projected members provided on said circular guide plate and said drive rotation member respectively.

14. A valve timing control device as claimed in claim 11, in which at least one of the first and second members is a projected portion that is integrally formed on the corresponding one of the circular guide plate and said drive rotation member.

15. A valve timing control device as claimed in claim 11, in which said second member comprises:

16. A valve timing control device as claimed in claim 15, in which said rectangular elastic member of said second member has exposed opposed ends to which said first member is contactable.

17. A valve timing control device as claimed in claim 15, in which said base member has a rectangular cross section to suppress an easy rotation of said rectangular elastic member thereabout.

18. A valve timing control device as claimed in claim 11, in which said second member comprises a rectangular elastic member secured to said drive rotation member by means of a connecting bolt, said rectangular elastic member having exposed opposed ends to which said first member is contactable.

19. A valve timing control device as claimed in claim 18, in which said connecting bolt has a flanged head which comprises a cylindrical base portion on which said elastic member is disposed and an annular flange portion by which said elastic member is pressed against the surface of said drive rotation member.

20. A valve timing control device of an internal combustion engine, comprising: