Aisin Seiki Kabushiki Kaisha

Kentaro Nagura

Hiromitsu Shigyo

Yugo Nakamura

A valve opening and closing timing control device includes: a driving-side rotating body including a sprocket around which a rotating body interlocked with a driving shaft of an internal combustion engine is wound and rotates in synchronization with the driving shaft; a driven-side rotating body supported by an inside of the driving-side rotating body to be rotatable coaxially with the same rotational axis and integrally rotating with a valve opening and closing cam shaft; a bolt inserted into the driven-side rotating body to fix the driven-side rotating body to the cam shaft; a fluid pressure chamber formed by being partitioned between the driving-side and driven-side rotating bodies; and a control valve switching supplying and discharging of a hydraulic fluid with respect to the fluid pressure chamber such that a relative rotational phase of the driven-side rotating body with respect to the driving-side rotating body is changed.

Valve opening and closing timing control device

A valve opening and closing timing control device includes: a driving-side rotating body coaxial with a rotational axis and rotated in synchronization with an internal combustion engine crankshaft; a driven-side rotating body coaxial with the rotational axis and integrally rotated with a valve opening and closing cam shaft; a connecting member screwed into the cam shaft for connecting the driven-side rotating body to the cam shaft and having a pump port to which a fluid is supplied, an advance angle port communicating with an advance angle chamber, and a retarded angle port communicating with an retarded angle chamber; a spool accommodated within a space of the connecting member to reciprocally move between advance angle, neutral, and retarded angle positions along the rotational axis; and an actuator causing a pressing force to act along rotational axis and operates the spool to be in the neutral, advance angle, or retarded angle positions.

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Paris, France

Kentaro Nagura