Nittan Valve Co., Ltd.

Nittan Vavle Co., Ltd.

Masayasu Nagado

Michihiro Kameda

Koichi Homma

Masaaki Niiro

Minoru Shiino

Naoya Ishihara

The inventive phase varying apparatus () has a drive rotor () driven by the crankshaft of the engine, a phase angle varying mechanism () for varying the phase angle of the camshaft relative to the crankshaft, and a self-locking mechanism () 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 () mounted on the drive rotor, a circular eccentric cam () integrated with the camshaft and having inside thereof a cam holding groove (), and a lock plate () rotatably supporting the periphery of the circular eccentric cam and having on the outer periphery thereof at least four radial abutment protrusions (-) that are adapted to abut against the inner periphery () of the cylinder section () to perform self-locking.

Phase varying apparatus for automobile engine technical

[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. [MEANS FOR SOLVING PROBLEMS] In a phase variable device of an engine for altering the phase angle between a cam shaft and crankshaft depending on the relative rotational direction of a first control body of revolution being braked by a rotary operating force imparting means, the rotary operating force imparting means comprises a brake means of the first control body of revolution, a second intermediate body of revolution rotating synchronously with the cam shaft, a second control body of revolution having a brake means, a first eccentric rotating mechanism interlocked with the first control body of revolution to perform eccentric rotation, a second eccentric rotating mechanism interlocked with the second control body of revolution to perform eccentric rotation, and a means for coupling the first and second eccentric rotating mechanisms to perform relative rotation by engaging with the substantially radial guide groove of the second intermediate body of revolution under displaceable state.

Cam shaft phase variable device in engine for automobile

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.

Phase varying device for engine

[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. The variable phase controller has a first braking means for rotating the first control rotor to one side, and a second braking means for braking a second control rotor and rotating the first control rotor in the direction opposite to the rotation caused by the first braking means via a second intermediate rotor (or cam guide plate) displaced by the force applied by a movable element (or rotating eccentric circular cam) displaced in guide grooves by braking of the second control rotor, thereby controlling the rotational motion of the first control rotor.

Variable phase controller for automotive engine

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.

Phase changing device for automobile engine

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.

Growing community of inventors

Hadano, Japan

Masayasu Nagado