Gm Global Technolgoy Operations, Inc.

Domenic Certo

Joseph J Moon

Alan L Browne

Paul W Alexander

Patrick J Tow

Bradley R Kaan

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.

Shifting camshaft groove design for load reduction

A detent assembly and a method of assembling the detent assembly are disclosed. The detent assembly includes a first shaft rotatable about a longitudinal axis and has an outer surface. The first shaft defines a cavity having an opening defined by the outer surface. The detent assembly further includes a camshaft defining an aperture along the longitudinal axis to present an inner wall of the camshaft that circumscribes the longitudinal axis. The inner wall defines a plurality of recesses spaced from each other. The detent assembly also includes a self-contained plunger unit that is secured to the first shaft in the cavity as a unit. A plunger of the self-contained plunger unit engages the inner wall as the camshaft is disposed over the self-contained plunger unit so that the plunger rests in one of the recesses of the camshaft to selectively secure together the first shaft and the camshaft.

Detent assembly and a method of assembling the detent assembly

A camshaft assembly includes a camshaft rotatable about a cam axis, and a lobe pack slideably attached to the camshaft. The lobe pack includes a barrel cam that defines a control groove disposed annularly about the cam axis. When the camshaft and the lobe pack rotate about the cam axis in a first rotational direction, the control groove is shaped to react against either a first or second shifting pin, to guide the lobe pack along a first or third path respectively, into a first or second axial position respectively. When the camshaft and the lobe pack rotate about the cam axis in a second rotational direction, the control groove is shaped to react against the first and second shifting pins to guide the lobe pack along a second path, into the second axial position.

Bi-directional control groove design for engine rotation reversal on engine with sliding camshaft

A braking system comprising a reconfigurable caliper piston adapted for, and a method of, retracting a brake pad utilizing active material actuation.

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Niagara Falls, Canada

Domenic Certo