A variable valve timing control device includes a connection mechanism provided with a coupling member which connects a driving-side rotation member and an input gear with each other, the connection mechanism including a first engagement portion and a second engagement portion, the first engagement portion engaged with the driving-side rotation member so as to be relatively displaceable therewith in a first radial direction, the second engagement portion engaged with the input gear so as to be relatively displaceable therewith in a second radial direction which is orthogonal to the first radial direction, and a biasing member restricting a coupling member from being displaced.

A connection unit connected to a rotation body by fitting to transmit a rotation force includes a rotation shaft, having a width across flat portion; and a core member, having fitting portions fitted to the rotation body in a direction perpendicular to the width across flat portion and an annular portion that the width across flat portion are slidably fitted, and held on the rotation shaft to be capable of moving relatively in two dimensions along the width across flat portion while rotating integrally with the rotation shaft. Accordingly, generation of vibration or noise can be prevented, and easiness of assembly work, cost reduction, miniaturization and the like can be achieved.

A variable camshaft timing (VCT) assembly for controlling the angular position of concentric camshafts includes an independent VCT device that is configured to couple with a first concentric camshaft and change an angular position of the first concentric camshaft relative to an angular position of a crankshaft; and one or more dependent VCT devices mechanically linking an output of the independent VCT device with a second concentric camshaft, wherein the dependent VCT device(s) change(s) an angular position of the second concentric camshaft relative to the angular position of the first concentric camshaft based on angular movement of the output of the independent VCT device.

An electrically-controlled eccentric camshaft phaser (10) that adjusts phase between a camshaft and a crankshaft includes a sprocket (12), configured to connect to the crankshaft and rotate about a center axis (x), having a sprocket ring gear (14); a camshaft plate (20) configured to connect to the camshaft and rotate about the center axis (x), having a camshaft ring gear (22); an eccentric shaft (28) that includes a crankshaft eccentric section (52) and a camshaft eccentric section (54); a sprocket bearing (16) that is received by the crankshaft eccentric section (52); a camshaft bearing (64), having a different diameter than the sprocket bearing (16), that is received by the camshaft eccentric section (54).

A single-row planetary bearing includes a single row of spherical rolling elements between an outer ring and an inner ring. A planetary gear is supported by a thrust bearing portion and is radially supported by the outer ring. The planetary gear performs a planetary motion while engaging with a driving rotor and a driven rotor at an eccentric side to adjust a rotational phase between the driving rotor and the driven rotor. The thrust bearing portion supports the planetary gear that is tilting with respect to the revolution centerline. The planetary gear has a recessed portion opened toward the thrust bearing portion. When the rotational phase is adjusted to a specific phase, the recessed portion is positioned at an anti-eccentric side opposite to the eccentric side with respect to a rotation centerline of the planetary gear.

A valve opening/closing timing control device that sets a relative rotation phase between a driving-side rotating body and a driven-side rotating body using a driving force of an electric actuator is compactly configured. The device is provided with: a first bearing disposed between an inner periphery of the driven-side rotating body and an eccentric member; a second bearing disposed between the eccentric member and an input gear on a side of the first bearing away from a camshaft in a direction along a rotational axis; and a front plate fixed to the driving-side rotating body on a side of the second bearing away from the camshaft. An Oldham coupling is disposed on the side away from the camshaft of both the first bearing and the second bearing in the direction along the rotational axis.

The present disclosure improves serviceability of an automotive powertrain unit without deteriorating NVH characteristics. A powertrain includes an engine having a cylinder head; and a transmission coupled to the engine. The engine includes an EGR connected between an intake passage and an exhaust passage. The transmission is provided below the cylinder head in a vehicle height direction. The EGR is provided along a side of the cylinder head toward the transmission, and supported by the transmission.

The present disclosure relates to a variable valve train for an internal combustion engine. The variable valve train has a camshaft with a cam and a rocker arm for activating at least one gas exchange valve of the internal combustion engine. The variable valve train has a swivelling lever element, in particular a swivelling lever gate, which has a support surface and a cam follower. The support surface is operatively connected, in particular in contact, with the rocker arm, and the cam follower follows a cam contour of the cam. The variable valve train has a first lever arm, which pivotably mounts the swivelling lever element, and is connected with a driven swivelling shaft for swivelling around a longitudinal axis of the swivelling shaft.

Provided is an actuator for a link mechanism for an internal combustion engine, which is capable of enhancing the durability of a wave gear type speed reducer or a bearing portion. The actuator for a link mechanism for an internal combustion engine according to the present invention includes: a housing including a bearing portion configured to support a control shaft so that the control shaft is rotatable; and the wave gear type speed reducer configured to reduce a rotation speed of an output shaft connected to a drive motor, and to transmit the reduced rotation speed to the control shaft. A restricting mechanism is provided to one of the control shaft and the housing, and is configured to restrict movement of the control shaft toward the wave gear type speed reducer side in an axial direction by being brought into contact with another of the control shaft and the housing.

A camshaft phaser arrangement configured for a concentric camshaft assembly having inner and outer camshafts is provided. The camshaft phaser arrangement includes a first camshaft phaser, a second camshaft phaser, and a coupling that torsionally connects the first camshaft phaser to the second camshaft phaser. Each of the camshaft phasers is configured to be connected to either the inner or the outer camshaft. The coupling includes at least one flexible connector that provides for radial and axial movement between the first camshaft phaser and the second camshaft phaser.