US 12,188,437 B2
EGR pump system and control method of EGR pump
Douglas Anthony Hughes, Novi, MI (US); Brandon Dennis Biller, Ferndale, MI (US); Jim Kevin Spring, Brighton, MI (US); Jesse Drummond, Rochester Hills, MI (US); and Matthew Fortini, Livonia, MI (US)
Assigned to Eaton Intelligent Power Limited, Dublin (IE)
Appl. No. 16/962,457
Filed by EATON INTELLIGENT POWER LIMITED, Dublin (IE)
PCT Filed Jan. 17, 2019, PCT No. PCT/EP2019/051130
§ 371(c)(1), (2) Date Jul. 15, 2020,
PCT Pub. No. WO2019/141766, PCT Pub. Date Jul. 25, 2019.
Claims priority of provisional application 62/736,161, filed on Sep. 25, 2018.
Claims priority of provisional application 62/733,340, filed on Sep. 19, 2018.
Claims priority of provisional application 62/674,872, filed on May 22, 2018.
Claims priority of provisional application 62/662,521, filed on Apr. 25, 2018.
Claims priority of provisional application 62/660,497, filed on Apr. 20, 2018.
Claims priority of provisional application 62/629,461, filed on Feb. 12, 2018.
Claims priority of provisional application 62/618,412, filed on Jan. 17, 2018.
Prior Publication US 2021/0071664 A1, Mar. 11, 2021
Int. Cl. F02M 26/49 (2016.01); F02B 33/34 (2006.01); F02B 33/38 (2006.01); F02B 39/10 (2006.01); F02D 41/00 (2006.01); F02D 41/06 (2006.01); F02D 41/14 (2006.01); F02M 26/00 (2016.01); F02M 26/05 (2016.01); F02M 26/33 (2016.01); F02M 26/34 (2016.01); F02M 26/50 (2016.01); F04C 18/12 (2006.01); F04C 18/14 (2006.01); F04C 28/06 (2006.01); F04C 28/08 (2006.01); F04C 29/02 (2006.01); F04C 29/04 (2006.01)
CPC F02M 26/49 (2016.02) [F02B 33/34 (2013.01); F02B 33/38 (2013.01); F02B 39/10 (2013.01); F02D 41/0007 (2013.01); F02D 41/0055 (2013.01); F02D 41/006 (2013.01); F02D 41/0065 (2013.01); F02D 41/064 (2013.01); F02D 41/1446 (2013.01); F02M 26/05 (2016.02); F02M 26/33 (2016.02); F02M 26/34 (2016.02); F02M 26/50 (2016.02); F04C 18/126 (2013.01); F04C 28/06 (2013.01); F04C 28/08 (2013.01); F04C 29/04 (2013.01); F02D 2200/021 (2013.01); F02M 26/00 (2016.02); F04C 18/14 (2013.01); F04C 29/02 (2013.01); F04C 2240/30 (2013.01); F04C 2240/81 (2013.01); F04C 2270/0525 (2013.01); F04C 2270/19 (2013.01); Y02T 10/12 (2013.01); Y02T 10/40 (2013.01)] 36 Claims
OG exemplary drawing
 
1. An exhaust gas recirculation pump for an internal combustion engine comprising:
an electric motor assembly including an electric motor disposed within an electric motor housing;
a roots device coupled to the electric motor, the roots device including a housing defining an internal volume;
rotors disposed in the internal volume and connected to the electric motor, wherein the electric motor housing includes a coolant path formed therein, the coolant path including a coolant inlet extending to a coolant outlet, said coolant inlet and outlet coupled to an engine coolant circulation system;
a cavity formed within the housing, the cavity fluidly connected to the coolant path;
a plurality of journals formed on the housing; and
a plurality of journals formed on a bearing plate, wherein the plurality of journals formed on the housing and the plurality of journals formed on the bearing plate include a plurality of bearing coolant outlets formed therein, wherein the plurality of bearing coolant outlets allow coolant to exit the bearings into the cavity,
wherein the bearing plate is attached to the housing, the bearing plate including bearing plate inner and outer surfaces, the bearing plate inner surface including a back flow port formed therein and facing a rotor end face, and
wherein the bearing plate outer surface includes at least a portion of the cavity formed therein.