Exhaust vane braking transition and correction strategy

A method of controlling vane braking on a gasoline engine having a turbocharger including a compressor and a turbine, the engine further having:

• a throttle that moves between open and closed positions to permit air into an intake manifold of the engine;
• vanes provided on the turbine that move between open and closed positions by a vane actuator to control an amount of exhaust air that flows through the turbine;
• at least one cam that rotates causing a valve to open and allow an amount of air to flow through the engine, the at least one cam having a cam actuator that impacts the rotation of the at least one cam;
• and a controller that controls a transition into vane braking, the method comprising:
• commanding, at the controller, the throttle to move to the closed position;
• commanding, at the controller, the vanes to the open position;
• determining, at the controller, whether additional negative torque is required;
• activating vane braking based on the determination that additional negative torque is required;
• commanding, at the controller, the vanes to the closed position;
• commanding, at the controller, the at least one cam to a maximum volumetric efficiency position;
• determining, at the controller, whether the at least one cam is at a maximum volumetric efficiency position;
• and
• commanding, at the controller, the throttle to the open position based on the determination that the at least one cam is at the maximum volumetric efficiency position.