# US 11,078,905 B2 · Automotive electrical oil pump > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,078,905 B2 - Document ID: US11078905B2 - Status: Granted - Kind: B2 - Application number: 16/068,897 - Filed: 2016-01-12 - Published: 2019-01-10 - Granted: 2021-08-03 - Earliest claimed: 2016-01-12 - Assignees: Pierburg Pump Technology GmbH - Applicants: Pierburg Pump Technology GmbH - Inventors: Alessandro Malvasi; Viktor Schroeder - Web page: https://patentgrep.com/patent/US11078905B2 ## CPC - F04C 15/06: Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet - F04C 2/102: {the two members rotating simultaneously around their respective axes} - F16N 13/20: Rotary pumps (with distributing equipment F16N13/22) - F04C 15/0057: {Driving elements, brakes, couplings, transmission specially adapted for machines or pumps (brakes, couplings, transmissions per se F16, B60)} - F16N 2210/04: Vehicles - F04C: ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS (engines F03C); ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS - F16N: LUBRICATING ## Abstract An automotive electrical oil pump includes an oil displacement pumping unit with a pump rotor which rotates in a pump chamber so as to pump a pressurized oil to an oil recipient, an electric driving motor which drives the pump rotor of the oil displacement pumping unit, an electrical connector plug which electrically connects the electric driving motor to a power source, and a fluid connector. The fluid connector includes a pump inlet which is fluidically connected to a chamber inlet, a pump outlet which is fluidically connected to a chamber outlet, a center front opening, and a ring front opening which is arranged coaxially to the center front opening. The center front opening and the ring front opening define the pump inlet and the pump outlet. ## Claims ### Claim 1 An automotive electrical oil pump comprising: an oil displacement pumping unit comprising a pump rotor which is configured to rotate in a pump chamber so as to pump a pressurized oil to an oil recipient; an electric driving motor configured to drive the pump rotor of the oil displacement pumping unit; an electrical connector plug configured to electrically connect the electric driving motor to a power source; and a fluid connector comprising, a center front opening which defines a pump inlet, the pump inlet being fluidically connected to a chamber inlet, a ring front opening which is arranged coaxially to the center front opening, the ring front opening defining a pump outlet which is fluidically connected to a chamber outlet, wherein, a rotation axis of each of the oil displacement pumping unit and the electric driving motor is the same as an axis of the fluid connector, and the oil displacement pumping unit is defined by a gerotor assembly. ### Claim 2 (depends on 1) The automotive electrical oil pump as recited in claim 1, wherein, the fluid connector further comprises a first circular opening wall arranged coaxially to the center front opening, and the first circular opening wall is configured to fluidically separate the center front opening and the ring front opening. ### Claim 3 (depends on 2) The automotive electrical oil pump as recited in claim 2, further comprising: a pump front side comprising the pump inlet and the pump outlet, wherein, the first circular opening wall is arranged coaxially to the rotation axis of the electric driving motor, and the first circular opening wall is arranged at the pump front side. ### Claim 4 (depends on 1) The automotive electrical oil pump as recited in claim 1, wherein, the fluid connector further comprises a first circular opening wall and a second circular opening wall which are arranged coaxially to each other, the first circular opening wall is configured to fluidically separate the center front opening and the ring front opening, and the second circular opening wall is configured to surround the center front opening, the ring front opening, and the first circular opening wall. ### Claim 5 (depends on 4) The automotive electrical oil pump as recited in claim 4, further comprising: a pump front side comprising the pump inlet and the pump outlet, wherein, the first circular opening wall and the second circular opening wall are arranged coaxially to the rotation axis of the electric driving motor, and the first circular opening wall and the second circular opening wall are arranged at the pump front side. ### Claim 6 (depends on 5) The automotive electrical oil pump as recited in claim 5, wherein the electrical connector plug is arranged radially with a plugging direction which is substantially radial with respect to the rotation axis. ### Claim 7 (depends on 1) The automotive electrical oil pump as recited in claim 1, wherein the pump inlet is arranged radially inside of the pump outlet. ### Claim 8 (depends on 1) The automotive electrical oil pump as recited in claim 1, wherein the pump outlet is arranged radially inside of the pump inlet. ### Claim 9 (depends on 4) The automotive electrical oil pump as recited in claim 4, wherein at least one of the first circular opening wall and the second circular opening wall comprises a radial sealing ring. ### Claim 10 (depends on 9) The automotive electrical oil pump as recited in claim 9, wherein the radial sealing ring or a respective radial sealing ring is arranged at an outer circumferential surface of the first circular opening wall and/or of the second circular opening wall. ### Claim 11 (depends on 1) The automotive electrical oil pump as recited in claim 1, further comprising: a connection channel configured to connect the center front opening with the chamber inlet or with the chamber outlet, wherein, the connection channel comprises an orientation with a radial component. ### Claim 12 An automotive electrical oil pump comprising: an oil displacement pumping unit comprising a pump rotor which is configured to rotate in a pump chamber so as to pump a pressurized oil to an oil recipient; an electric driving motor configured to drive the pump rotor of the oil displacement pumping unit, the electric driving motor comprising a rotation axis; an electrical connector plug configured to electrically connect the electric driving motor to a power source; and a fluid connector comprising, a center front opening which defines a pump inlet, the pump inlet being fluidically connected to a chamber inlet, a ring front opening which is arranged coaxially to the center front opening, the ring front opening defining a pump outlet which is fluidically connected to a chamber outlet, and a first circular opening wall arranged coaxially to the center front opening, wherein, the pump inlet and the pump outlet are arranged on a pump front side, the first circular opening wall is configured to fluidically separate the center front opening and the ring front opening, the first circular opening wall is arranged at the pump front side, and the first circular opening wall is arranged coaxially to the rotation axis of the electric driving motor, and the oil displacement pumping unit is defined by a gerotor assembly. ### Claim 13 (depends on 12) The automotive electrical oil pump as recited in claim 12, wherein, the fluid connector further comprises a second circular opening wall which is arranged coaxially to the first circular opening wall, and the second circular opening wall is configured to surround the center front opening, the ring front opening, and the first circular opening wall. ### Claim 14 (depends on 13) The automotive electrical oil pump as recited in claim 13, wherein, the second circular opening wall is arranged coaxially to the rotation axis of the electric driving motor, and the second circular opening wall is arranged at the pump front side. ### Claim 15 (depends on 14) The automotive electrical oil pump as recited in claim 14, wherein the electrical connector plug is arranged radially with a plugging direction which is substantially radial with respect to the rotation axis. ### Claim 16 (depends on 13) The automotive electrical oil pump as recited in claim 13, wherein at least one of the first circular opening wall and the second circular opening wall comprises a radial sealing ring. ### Claim 17 (depends on 16) The automotive electrical oil pump as recited in claim 16, wherein the radial sealing ring or a respective radial sealing ring is arranged at an outer circumferential surface of the first circular opening wall and/or of the second circular opening wall. ### Claim 18 (depends on 12) The automotive electrical oil pump as recited in claim 12, further comprising: a connection channel configured to connect the center front opening with the chamber inlet or with the chamber outlet, wherein, the connection channel comprises an orientation with a radial component.