Patent ID: 7467611

Claim:
In an internal combustion engine having at least one intake cam phaser and at least one exhaust cam phaser, each phaser being controllable independently at a controlled phase rate by an engine controller, a method for controllably balancing simultaneously the independent actuations of said intake cam phaser and said exhaust cam phaser, comprising the steps of: a) selecting a phaser priority from the group consisting of “intake cam phaser has priority of actuation and exhaust cam phaser has non-priority of actuation”, “exhaust cam phaser has priority of actuation and intake cam phaser has non-priority of actuation”, and “intake and exhaust cam phasers have equal priorities of actuation”; b) actuating a first cam phaser from said selected priority at a first phase rate; c) determining a delay time from the beginning of said actuating of said first cam phaser; and d) actuating a second cam phaser from said selected priority at a second phase rate at the end of said delay time.