Adjustable valve timing system

An adjustment device for changing the rotational timing between a cam and a crankshaft, the adjustment device comprising:

• a driven device operatively connected to the crankshaft and having a first plurality of channels directed radially inward toward a central axis;
• a hub axially aligned with the driven device along the central axis and connectable to the cam;
• and
• an adjuster, wherein one of the hub and the adjuster includes a second plurality of channels, wherein each of the second plurality of channels originates at a respective first point and is directed inward toward a respective second point radially offset from the first point and the central axis, and the other of the hub and the adjuster includes a third plurality of channels spiraled away from the central axis.

A method of adjusting valve timing, comprising applying torque to an adjuster, wherein the application of torque results in:

• a radial movement of a slider block;
• a movement of a slider block fastener with respect to a hub, wherein the movement of the slider block fastener is along a line offset from a central axis of the hub;
• and
• a rotation of the hub;
• wherein applying torque includes applying torque to the adjuster until a timing indicia on the adjuster aligns with a desired timing indicia on a driven member that houses the slider block;
• and
• wherein the fastener extends through the slider block and the method further includes:
• loosening the fastener prior to applying torque;
• and
• tightening the fastener after the timing indicia on the adjuster aligns with the desired timing indicia on the driven member.

A power system, comprising:

• a power source having a crankshaft and a cam;
• a driven device operatively connected to the crankshaft and having a first plurality of channels directed radially inward toward a central axis;
• a hub axially aligned with the driven device along the central axis and connectable to the cam, the hub having a second plurality of channels, wherein each of the second plurality of channels originates at a respective first point and is directed inward toward a respective second point radially offset from the first point and the central axis;
• an adjuster having a third plurality of channels spiraled away from the central axis;
• a slider block disposed within each of the first plurality of channels;
• and
• a fastener extending through opposing sides of the slider block to engage the adjuster and the hub, wherein a rotation of the adjuster relative to the driven device results in radial movement of the slider block and a rotation of the hub relative to the driven device.