Eaton Intelligent Power Limited

Jesse Drummond

Douglas Anthony Hughes

Brandon Dennis Biller

Matthew James Fortini

Jim Kevin Spring

Exhaust gas recirculation pump () for an internal combustion engine that includes an electric motor () disposed within a housing (). A Roots device () is coupled to the electric motor () and includes a housing () defining an internal volume () in which rotors () are disposed and are connected to the electric motor (). The electric motor housing () includes a coolant path () formed therein which extends from a coolant inlet () to a coolant outlet (), both coupled to an engine coolant circulation system. The housing includes an oil path () formed therein. The oil path includes an oil inlet () extending to at least one oil outlet (). The oil inlet and outlet are coupled to an engine oil circulation system wherein the oil path () lubricates bearings () and a transmission assembly () of the exhaust gas recirculation pump ().

EGR pump system and control method of EGR pump

A method of operating exhaust gas recirculation pump for an internal combustion engine including: providing an EGR pump assembly including an electric motor coupled to a roots device having rotors, the EGR pump operably connected to an internal combustion engine; providing an EGR control unit linked to the EGR pump assembly; providing sensors linked to the EGR control unit; determining if a motor speed is within a predetermined target in step Swherein when motor speed=predetermined target then; determining if a motor torque is within a predetermined target in step Swherein when motor torque=predetermined target then; determining if a motor temperature is within a predetermined target in step Swherein when motor temperature=predetermined target then; and maintaining operation of the exhaust gas recirculation pump.

A method of operating an exhaust gas recirculation pump for an internal combustion engine including: providing an EGR pump assembly including an electric motor coupled to a roots device having rotors, the EGR pump operably connected to an internal combustion engine; providing an EGR control unit lined to the EGR pump assembly; providing sensors linked to the EGR control unit; determining if a motor speed is within a predetermined target (step SI), wherein when the motor speed is within the predetermined target then; determining if a motor torque is within a predetermined target (step S) wherein when the motor torque is within the predetermined target then; determining if a motor temperature is within a predetermined target (step S) wherein when the motor temperature is within the predetermined target then; maintaining operation of the exhaust gas recirculation pump.

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Rochester Hills, MI, United States of America

Jesse Drummond