SUPERCHARGED ENGINE AND METHOD OF CONTROL

摘要

Methods and systems for minimizing the power consumed by a supercharger pump in an engine system. The methods and systems minimize the delta pressure across the pump with a control strategy for positioning the electronic throttle and supercharger bypass valve in a coordinated manner to deliver the required amount of fresh air flow into engine (i.e., the air flow associated with the driver's requested torque), while, at the same time, minimizing the power consumed by the supercharger pump for best fuel economy.

主权项

1. A method of controlling an engine system, the system comprising a throttle, a supercharger pump and a supercharger bypass valve connected between an intake manifold and the throttle, said method comprising:
determining, by a processor, a desired manifold pressure; setting one of the throttle or the bypass valve to a predetermined position based on the desired manifold pressure and at least one operating parameter of the system; and controlling the other of the throttle or the bypass valve to minimize pressure across the supercharger pump.