US 11,939,929 B2
Engine electrified air system including electric turbocharger and exhaust gas recirculation pump
Danan Dou, Cedar Falls, IA (US); and Eric J. Haaland, Waverly, IA (US)
Assigned to DEERE &COMPANY, Moline, IL (US)
Filed by Deere & Company, Moline, IL (US)
Filed on Aug. 19, 2021, as Appl. No. 17/406,656.
Prior Publication US 2023/0054060 A1, Feb. 23, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. F02M 26/34 (2016.01); B60W 10/06 (2006.01); B60W 10/08 (2006.01); B60W 10/26 (2006.01); B60W 20/15 (2016.01); F01N 13/10 (2010.01); F02B 39/10 (2006.01); F02D 41/00 (2006.01); F02M 26/03 (2016.01); F02M 26/22 (2016.01); F02M 35/104 (2006.01)
CPC F02D 41/005 (2013.01) [B60W 10/06 (2013.01); B60W 10/08 (2013.01); B60W 10/26 (2013.01); B60W 20/15 (2016.01); F01N 13/10 (2013.01); F02B 39/10 (2013.01); F02D 41/0007 (2013.01); F02M 26/03 (2016.02); F02M 26/22 (2016.02); F02M 35/104 (2013.01); B60W 2510/0638 (2013.01); B60W 2510/244 (2013.01)] 17 Claims
OG exemplary drawing
 
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.