Patent ID: 11939929
Assignee: DEERE & COMPANY
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  B  Y | IPC B  F

Claim 0:
1. An engine system comprising:
an engine having one or more piston-cylinder arrangements communicating with an intake manifold and an exhaust manifold;
an electrical power system configured to provide electrical power in the engine system, the electrical power system comprising an energy storage device and an electrical bus; and
an electrified air system powered by the electrical power from the electrical power system to selectively increase a flow of intake air and exhaust gas to the engine, the electrified air system comprising:
an exhaust gas recirculation (EGR) pump; and
an electric turbocharger having:
a turbine in communication with the exhaust manifold;
a compressor in communication with the intake manifold and driven by the turbine via a shaft coupled therebetween; and
an electrical machine coupled to the shaft; and

a controller, including a processor and memory architecture, operably connected with the electrified air system, the controller configured to:
operate the EGR pump in a forward mode to recirculate a portion of exhaust gas output from the exhaust manifold back to the intake manifold; and
operate the EGR pump in a reverse mode to supply compressed intake air from the intake manifold to the turbine of the electric turbocharger so that the turbine receives both exhaust gas and compressed intake air;
wherein the controller selectively controls the EGR pump to operate in reverse mode when the controller receives an input of engine speed or engine load calling for a boost of compressed charge air to the engine to increase engine power.