Abstract: The inventive phase varying apparatus (50) has a drive rotor (51) driven by the crankshaft of the engine, a phase angle varying mechanism (54) for varying the phase angle of the camshaft relative to the crankshaft, and a self-locking mechanism (56) for preventing a gap in phase angle between the drive rotor and the camshaft due to an externally input disturbing torque. The self-locking mechanism has a cylinder section (69) mounted on the drive rotor, a circular eccentric cam (64) integrated with the camshaft and having inside thereof a cam holding groove (68a), and a lock plate (68) rotatably supporting the periphery of the circular eccentric cam and having on the outer periphery thereof at least four radial abutment protrusions (74-77) that are adapted to abut against the inner periphery (69a) of the cylinder section (69) to perform self-locking.

Abstract: [PROBLEMS] To provide an inexpensive cam shaft phase variable device of an engine in which the displacement width of attachment angle between a crankshaft and a camshaft is large and operational sound is silent.

Abstract: To provide a simpler, axially shorter, and easy-to-manufacture phase varying apparatus for an automobile engine, utilizes a four-link mechanism consisting of multiple circular members. MEANS FOR ACHIEVING THE OBJECT An inventive phase varying apparatus has: a camshaft; drive rotor driven by the crankshaft; a first and a second torque means for rotating a first and a second control rotors, all aligned coaxially and rotatable relative to each other; and a phase angle varying mechanism operably coupled to the first and second torque means, so as to varying the relative phase angle between the camshaft and the crankshaft. The phase angle varying mechanism comprises: a circular eccentric cam integral with the camshaft; a first and a second link each having a shape of a substantially cylindrical form; and a quasi-radial guide mechanism and displacement forcing means collaborating with each other for displacing either one of the first and second links in a quasi-radial direction of the rotor.

Abstract: The inventive phase varying apparatus (50) has a drive rotor (51) driven by the crankshaft of the engine, a phase angle varying mechanism (54) for varying the phase angle of the camshaft relative to the crankshaft, and a self-locking mechanism (56) for preventing a gap in phase angle between the drive rotor and the camshaft due to an externally input disturbing torque. The self-locking mechanism has a cylinder section (69) mounted on the drive rotor, a circular eccentric cam (64) integrated with the camshaft and having inside thereof a cam holding groove (68a), and a lock plate (68) rotatably supporting the periphery of the circular eccentric cam and having on the outer periphery thereof at least four radial abutment protrusions (74-77) that are adapted to abut against the inner periphery (69a) of the cylinder section (69) to perform self-locking.

Abstract: The invention provides a variable cam phaser for an automobile engine, equipped with a self-locking mechanism which is simpler in structure, cost effective, and easy to manufacture. The self-locking mechanism includes: a eccentric circular members (12) integral with the camshaft (6) and a support groove (15) for supporting the eccentric circular members from the both sides thereof at positions offset from the camshaft axis towards the eccentric cam center; a lock plate integrally held with the control rotor by means of a coupling mechanism; and a cylindrical portion belonging to the drive rotor in which the lock plate is inscribed. The self-locking mechanism prevents an unexpected change in the phase angle caused by an external disturbing toque transmitted to the camshaft via the crankshaft of the engine.

Abstract: [Problems] To provide a variable phase controller for an engine which assures easy manufacturing at low cost, reduces operating sound, and includes a relative rotational motion mechanism enabling quick change of a phase angle between a cam shaft and a crank shaft. [Means for Solving Problems] A variable phase controller for an engine controls the rotational motion of a first control rotor for changing the relative phase angle between a crank shaft and a cam shaft to either a phase-lead angle side or a phase-lag angle side in accordance with the direction of such control.

Abstract: A phase changing device for automobile engine, the device comprising curved first guide grooves formed in the control rotor, each groove skewed with respect to a circumference of a circle centered at the rotational axis; oblique guide grooves each groove formed in the middle rotor and extending at an angle with respect to a radius crossing the groove; second guide grooves formed in the drive rotor and skewed with respect to the circumference of a circle centered at the rotational axis, block sections each extending along, and movable in, the respective first guide; first slide members each protruding from the respective block section for engagement with, and for movement in, the respective skewed guide groove; and phase varying members each having a second slide member that extends through an escape groove formed in the middle rotor and engages the respective second guide groove to move in the second guide groove.

Abstract: A cam shaft phase variable device of an engine in which the attachment angle of a crankshaft and a cam shaft is maintained securely without being shifted by disturbance torque. The device has a drive body of revolution having a tubular section and a guide groove of reducing diameter and rotating relatively to the cam shaft and being driven by a crankshaft, a control body of revolution rotating relatively to the drive body through a rotary operating force imparting means and having the outer circumferential surface supported by the inner circumferential surface of the tubular section, an eccentric circular cam rotating synchronously, a movable member for displacing the guide groove, a cam guide intersecting the central axis perpendicularly and displaced by the eccentric circular cam, and an intermediate body of revolution displacing in the direction intersecting the cam guide perpendicularly while being supported on, and rotating integrally with, the camshaft.

Abstract: OBJECT To provide a simpler, axially shorter, and easy-to-manufacture phase varying apparatus for an automobile engine, utilizes a four-link mechanism consisting of multiple circular members. MEANS FOR ACHIEVING THE OBJECT An inventive phase varying apparatus has: a camshaft; drive rotor driven by the crankshaft; a first and a second torque means for rotating a first and a second control rotors, all aligned coaxially and rotatable relative to each other; and a phase angle varying mechanism operably coupled to the first and second torque means, so as to varying the relative phase angle between the camshaft and the crankshaft. The phase angle varying mechanism comprises: a circular eccentric cam integral with the camshaft; a first and a second link each having a shape of a substantially cylindrical form; and a quasi-radial guide mechanism and displacement forcing means collaborating with each other for displacing either one of the first and second links in a quasi-radial direction of the rotor.

Abstract: A cam shaft phase variable device of an engine in which the attachment angle of a crankshaft and a cam shaft is maintained securely without being shifted by disturbance torque. The device has a drive body of revolution having a tubular section and a guide groove of reducing diameter and rotating relatively to the cam shaft and being driven by a crankshaft, a control body of revolution rotating relatively to the drive body through a rotary operating force imparting means and having the outer circumferential surface supported by the inner circumferential surface of the tubular section, an eccentric circular cam rotating synchronously, a movable member for displacing the guide groove, a cam guide intersecting the central axis perpendicularly and displaced by the eccentric circular cam, and an intermediate body of revolution displacing in the direction intersecting the cam guide perpendicularly while being supported on, and rotating integrally with, the camshaft.

Abstract: [Problems] To provide an inexpensive cam shaft phase variable device of an engine in which the displacement width of attachment angle between a crankshaft and a camshaft is large and operational sound is silent.

Abstract: [Problems ] To provide a variable phase controller for an engine which assures easy manufacturing at low cost, reduces operating sound, and includes a relative rotational motion mechanism enabling quick change of a phase angle between a cam shaft and a crank shaft. [Means for Solving Problems] A variable phase controller for an engine controls the rotational motion of a first control rotor for changing the relative phase angle between a crank shaft and a cam shaft to either a phase-lead angle side or a phase-lag angle side in accordance with the direction of such control.

Abstract: Objects The invention provides a phase changing device for automobile engine capable of preventing an unanticipated change in phase angle between the middle rotor and the camshaft of the device caused by a disturbing torque while preventing frictional wear of the inner circumferential walls of groove guides and avoiding generation of axial thrusts of links of the device. Means for Solving the Problems A phase changing device for automobile engine, having a drive rotor, an middle rotor, and a control rotor, all arranged to rotate about a common rotational axis, the device controlling the control rotor so as to vary the relative phase angle between the drive rotor and middle rotor.

Abstract: Objects: To provide a direct-acting type valve lifter that is simple in structure, involves a small number of components, and is capable of switching its valve lift between a high and a low lift. Means for Carrying Out the Invention: The valve lifter is mounted between a cam unit (20) and a valve stem (15). The cam unit (20) comprises a high-lift cam (22) and a low-lift cam (24) integrated to the high-lift cam. The valve lifter (30) is equipped with a side lifter (32) for slidably lifting the low-lift cams (24), a center lifter (40) for slidably lifting the high-lift cam, and hydraulic means (oil groove) (11b) for sliding the center lifter (40) so as to switch the valve lift in two levels, i.e. to switch between a high and a low lift. A cylindrical body of the valve lifter is provided on the top end thereof with a slit (33) for allowing the high-lift cam to freely rotate therein, and with sliding surfaces (32a) serving as a side lifter (32) to be in sliding contact with the low lift cam.