CAMSHAFT PHASER SYSTEMS AND METHOD OF COMMUTATING AN ELECTRIC MOTOR FOR THE SAME

摘要

A system (42) including a phaser (28), a motor (38), and a controller (40) for controlling the phase between a camshaft (18) and a crankshaft (16) of an engine (10). The phaser (28) is attached to the camshaft (18), is in communication with the crankshaft (16), and is configured to adjust the phase of the camshaft (18). The motor (38) actuates the phaser (28) and is operatively attached to and in communication with the phaser (28) such that rotation of the crankshaft (16) back-drives the motor (38) to subsequently generate a signal. The controller (40) is in electrical communication with the motor (38), is responsive to the signal, and uses the signal to determine the rotational speed of the motor (38) to thereby commutate the motor (38) and subsequently drive the motor (38) so as to actuate the phaser (28) and control the phase of the camshaft (18).

主权项

1. A camshaft (18) phaser (28) system (42) for use in controlling the phase between a camshaft (18) and a crankshaft (16) of an internal combustion engine (10), said system comprising:
a phaser (28) operatively attached to the camshaft (18) and in rotational communication with the crankshaft (16) for adjusting the phase of the camshaft (18) with respect to the crankshaft (16); an electric motor (38) that actuates said phaser (28), said electric motor (38) operatively attached to and in rotational communication with said phaser (28) such that rotation of the crankshaft (16) back-drives said electric motor (38) and said electric motor (38) generates a signal; and a controller (40) in electrical communication with said electric motor (38), said controller (40) being responsive to said signal to thereby commutate said electric motor (38) and subsequently drive said electric motor (38) so as to actuate said phaser (28) and control the phase of the camshaft (18).