A camshaft assembly is disclosed that comprises an inner shaft, an outer tube surrounding and rotatable relative to the inner shaft, and two groups of cam lobes mounted on the outer tube. The first group of cam lobes is fast in rotation with the outer tube and the second group is rotatably mounted on the outer surface of the outer tube and is connected for rotation with the inner shaft. A timing wheel is connected for rotation with the inner shaft to provide position information to a sensor, the timing wheel being formed as a separate part that is assembled to one of the cam lobes in the second group.

A camshaft assembly is disclosed that comprises an inner shaft, an outer tube surrounding and rotatable relative to the inner shaft, and two groups of cam lobes mounted on the outer tube. The first group of cam lobes is fast in rotation with the outer tube and the second group is rotatably mounted on the outer surface of the outer tube and is connected for rotation with the inner shaft. A timing wheel is connected for rotation with the inner shaft to provide position information to a sensor, the timing wheel being formed as a separate part that is assembled to one of the cam lobes in the second group.

An engine variable camshaft timing phaser (10) includes a sprocket (12) and a planetary gear set (14). The sprocket (12) receives rotational drive input from an engine crankshaft. The planetary gear set (14) includes two or more ring gears (34, 36), multiple planet gears (32), a sun gear (30), a first set of teeth (82), and a second set of teeth (40, 62). One of the ring gears (34, 36) can be connected to the sprocket (12) and one of the ring gears (34, 36) transmits rotational drive output to an engine camshaft. The sun gear (30) engages with the planet gears (32) and is driven by an electric motor (38). In order to bring the planetary gear set (14) to a locked condition, the first set of teeth (82) and the second set of teeth (40, 62) are mated with each other.

An engine variable camshaft timing phaser (10) includes a sprocket (12) and a planetary gear assembly (14). The sprocket (12) receives rotational drive input from an engine crankshaft. The planetary gear assembly (14) includes two or more ring gears (26, 28), multiple planet gears (24), a sun gear (22), and a wrap spring (76). One of the ring gears (26, 28) receives rotational drive input from the sprocket (12) and one of the ring gears (26, 28) transmits rotational drive output to an engine camshaft. The sun gear (22) engages with the planet gears (24). The wrap spring (76) experiences expansion and contraction exertions to permit advancing and retarding engine valve opening and closing, and to prevent advancing and retarding engine valve opening and closing.

A camshaft assembly includes a base shaft including at least one lobe pack axially movably mounted on the base shaft, the lobe pack including a control groove therein. An actuator device includes a pin movably mounted to the actuator between a retracted position and an extended position for engaging with the control groove to cause axial movement of the lobe pack. The control groove includes a pin engagement region, a shifting region and an ejection region. The pin engagement region of the control groove has a first pair of sidewalls. The shifting region extends from the pin engagement region and has a second pair of sidewalls angled relative to the first pair of sidewalls and having a first portion with a varying groove width that varies relative to a groove width of the pin engagement region.

A camshaft assembly includes a base shaft including at least one lobe pack axially movably mounted on the base shaft, the lobe pack including a control groove therein. An actuator device includes a pin movably mounted to the actuator between a retracted position and an extended position for engaging with the control groove to cause axial movement of the lobe pack. The control groove includes a pin engagement region, a shifting region and an ejection region. The pin engagement region of the control groove has a first pair of sidewalls. The shifting region extends from the pin engagement region and has a second pair of sidewalls angled relative to the first pair of sidewalls and having a first portion with a varying groove width that varies relative to a groove width of the pin engagement region.

A variable valve gear for an internal combustion engine includes: a cam base portion integrally or separately provided in a camshaft, and immovably fixed to the camshaft; a cam lobe portion connected to the cam base portion so as to swing and shift between a first state where the cam lobe portion is positioned to project from an outer circumference of the base portion and a second state where the cam lobe portion is positioned to be lower than the cam base portion in the first state; a lock mechanism locking the cam lobe portion in the first and second state; and a biasing member biasing the cam lobe portion to be shifted to the first state, to such an extent that the cam lobe portion is shifted to the second state by reaction force from a cam follower when the locking mechanism is unlocked.

A multiple variable valve lift apparatus includes a camshaft. At least two cam portions are disposed on an exterior circumference of the camshaft and including a high cam and a normal cam. A cylinder deactivation device is configured to perform a lever motion by one of the high cam or the normal cam and to be operated by hydraulic pressure. At least two lift operating portions are disposed on the exterior circumference of the camshaft and moving the cam portions in an axial direction of the camshaft. An operation control portion selectively moves the operating portions in the axial direction of the camshaft. A guide rail is formed in a groove of an exterior circumference of the lift operating portions into which a pin is inserted. The guide rail guides the pin according to rotation of the camshaft and the operating portions.

Disclosed is a toothed wheel for a camshaft, forming a target for a camshaft position sensor, the toothed wheel including a circular body including two opposite main faces, and at least four teeth distributed around the circumference of the circular body, each tooth including two edges, one corresponding to a rising edge and the other to a falling edge, according to a direction of rotation of the wheel, the angular separation between the edges of each tooth being different for each tooth, characterized in that the four teeth are shaped so that the toothed wheel includes, considering the same main face and the same direction of rotation of the wheel: four edges of the same first rising or falling type spaced apart by 90° respectively, and three edges of the second falling or rising type respectively, spaced apart by 120° respectively.

The system, according to one embodiment of the present invention, comprises a stationary coil linear motor to drive a valve with a stem comprising a ferromagnetic property. The linear motor moves the valve in response to control governed by an electronic valve control computer. The valve is movable between a closed position at a selectable rate of both acceleration and speed for a selectable distance (“lift”) to a second selectable open position, including all position variations between the fully open and fully closed states. Valve position, velocity and acceleration can be varied both during a valve stroke and from one stroke to the next, as controlled by the logic programmed on a non-transitive memory of the electronic valve control computer.