CONTROL STRATEGY FOR AN ENGINE

摘要

The present disclosure relates to a method of controlling an engine. The method includes manipulating a combustion air bypass valve between an open position and a closed position to create a negative pressure differential across a supercharger. The negative pressure differential is converted into a torque by the supercharger and transmitted from the supercharger back to the engine.

主权项

1. A method of controlling an engine including a combustion air boosting system supplying a flow of pressurized combustion air to the engine and including a supercharger mechanically coupled to the engine, the boosting system including a combustion air bypass duct for bypassing a flow of air around the supercharger and a combustion air bypass valve for controlling the flow of air through the combustion air bypass duct, the method comprising:
adjusting a position of the combustion air bypass valve to adjust a flow rate of the combustion air through the combustion air bypass duct to create a negative pressure differential across the supercharger between an inlet of the supercharger and an outlet of the supercharger to generate a torque converting a negative pressure differential across the supercharger into a torque applied to a drive shaft of the supercharger, wherein the negative pressure differential between the inlet and the outlet of the supercharger, spins the drive shaft and thereby imparts a torque to the drive shaft; and outputting the torque as a rotational output from the supercharger drive shaft to a crankshaft of the engine through a mechanical connection between the supercharger and the crankshaft of the engine, wherein the rotational output of the supercharger is defined as a torque applied from a drive shaft of the supercharger through the mechanical connection back to the crankshaft of the engine.