Cam phasing systems and methods
AssigneeHUSCO Automotive Holdings LLC
InventorsAustin Schmitt, Allen Tewes, Michael Kujak, Brian Heidemann
Life of this patent
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Abstract
Cam phasing systems and methods are provided. In particular, a cam phasing system is provided that includes a reduced number of components when compared to current mechanical cam phasing systems. The cam phasing system includes a helix locking design that is configured to frictionally lock an helix rod during cam torque pulses.
Claims20
A cam phasing system configured to vary a rotational relationship between a camshaft and a crankshaft of an internal combustion engine, the cam phasing system comprising:
- a sprocket hub configured to be coupled to the crankshaft;
- a cradle rotor configured to be coupled the camshaft;
- a spider rotor configured to be coupled to the cradle rotor, wherein the spider rotor is configured to rotate to a predetermined rotational offset relative to the sprocket hub in response to a force applied to the spider rotor;
- and
- an actuator coupled to the spider rotor through a compliance mechanism, wherein the actuator is configured to selectively apply the force to the spider rotor through the compliance mechanism, and wherein the compliance mechanism is coupled between the spider rotor and the actuator and includes at least one spring arranged to apply and maintain the force from the actuator on the spider rotor.
A cam phasing system configured to vary a rotational relationship between a camshaft and a crankshaft of an internal combustion engine, the cam phasing system comprising:
- a sprocket hub configured to be coupled to the crankshaft;
- a cradle rotor configured to be coupled the camshaft;
- a spider rotor configured to be coupled to the cradle rotor;
- an actuator configured to supply an input displacement;
- an intermediate ring coupled to the actuator and configured to receive the input displacement;
- and
- a compliance mechanism coupled between the intermediate ring and the spider rotor, wherein the compliance mechanism includes a spring configured to, upon the input displacement being supplied to the intermediate ring, supply and maintain a force on the spider rotor until the spider rotor reaches a predetermined rotational offset relative to the sprocket hub.
Dependencies are inferred from the claim text.