TURBOCHARGING SYSTEM WITH ELECTRIC MOTOR(S)

摘要

An internal combustion engine includes a cylinder block defining a cylinder and a cylinder head mounted to the block. The cylinder head supplies air and fuel to the cylinder for combustion therein. The engine also includes an exhaust manifold operatively connected to the cylinder head and having first and second outlets configured to exhaust post-combustion gasses from the cylinder. The engine also includes a turbocharging system including a low-flow turbocharger driven by the post-combustion gasses from the first outlet to pressurize the airflow and a high-flow turbocharger driven by the post-combustion gasses from the second outlet. The turbocharging system also includes a flow control device for selectively directing the post-combustion gasses to the low-flow and high-flow turbochargers. The turbocharging system additionally includes a motor-generator to selectively assist the post-combustion gasses in driving either the low-flow or the high-flow turbocharger and generate electric current when driven via the subject turbocharger.

主权项

1. An internal combustion engine comprising:
a cylinder block defining a cylinder; a cylinder head mounted to the cylinder block and configured to supply air and fuel to the cylinder for combustion therein; an exhaust manifold operatively connected to the cylinder head and having a first outlet and a second outlet, wherein each of the first and second outlets is configured to exhaust post-combustion gasses from the cylinder; and a turbocharging system configured to pressurize an airflow being received from the ambient for delivery to the cylinder, the turbocharging system including:
a low-flow turbocharger configured to be driven by the post-combustion gasses from the first outlet in order to pressurize the airflow and discharge the pressurized airflow to the cylinder;a high-flow turbocharger configured to be driven by the post-combustion gasses from the second outlet in order to pressurize the airflow and discharge the pressurized airflow to the cylinder;a flow control device configured to selectively direct the post-combustion gasses to the low-flow turbocharger and the high-flow turbocharger; anda first motor-generator operatively connected to one of the low-flow turbocharger and high-flow turbocharger and configured to selectively assist the post-combustion gasses in driving said one turbocharger and generate electric current when driven via said one turbocharger.