VALVE OPENING/CLOSING TIMING CONTROL DEVICE

Title:

VALVE OPENING/CLOSING TIMING CONTROL DEVICE

Document Type and Number:

WIPO Patent Application WO/2006/035602

Kind Code:

A1

Abstract:

A valve opening/closing timing control device, comprising a first rotating body rotating together with the camshaft of an internal combustion engine, a second rotating body rotating together with a crankshaft and rotatable relative to the first rotating body, a control means changing a relative rotation phase between the first rotating body and the second rotating body, and a torsion coil spring energizing the first rotating body in a direction for advancing it relative to the second rotating body. The torsion coil spring (20) comprises locking parts locked to the first and second rotating bodies (1) and (2) and a coil part (22) positioned between the both locking parts. The coil part (22) comprises a pair of holding areas (23a) and (23b) capable of positioning the coil part (22) on the peripheral surfaces of the rotating bodies (1) and (2) and a torque generating area (25) positioned between the pair of holding areas. The winding diameters of the coil part in the holding area and the torque generating area are differentiated from each other. Thus, it can be avoided that a frictional resistance occurs between the coil part of the torsion coil spring and the rotating bodies and the specified spring force of the torsion coil spring cannot be developed.

Inventors:

OGAWA KAZUMI (JP)

Application Number:

PCT/JP2005/016939

Publication Date:

April 06, 2006

Filing Date:

September 14, 2005

Export Citation:

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Assignee:

AISIN SEIKI (JP)
OGAWA KAZUMI (JP)

International Classes:

F01L1/34

Foreign References:

JP2004204726A	2004-07-22
JP2002276312A	2002-09-25
JP2002227621A	2002-08-14
JP2003120229A	2003-04-23
JP2004204726A	2004-07-22

Other References: