# US 2016/0252000 A1 · Dual mode cooling pump with over-running clutch > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2016/0252000 A1 - Document ID: US20160252000A1 - Status: Published application - Kind: A1 - Application number: 14/634,802 - Filed: 2015-02-28 - Published: 2016-09-01 - Earliest claimed: 2015-02-28 - Assignees: BorgWarner Inc. - Applicants: BorgWarner Inc. - Inventors: David M. VanZuilen - Web page: https://patentgrep.com/patent/US20160252000A1 ## CPC - F04D 13/022: {a coupling allowing slip, e.g. torque converter} - F04D 13/021: {containing a coupling} - F04D 13/06: the pump being electrically driven - F04D 15/0066: {by changing the speed, e.g. of the driving engine} - F16D 41/088: {the intermediate members being of only one size and wedging by a movement not having an axial component, between inner and outer races, one of which is cylindrical} - F01P 7/164: {by varying pump speed} - F16D 48/02: Control by fluid pressure - F16D 2023/123: {Clutch actuation by cams, ramps or ball-screw mechanisms} - F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02) - F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES - F01P: COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES (arrangements in connection with cooling of propulsion units in vehicles B60K11/00; heat-transfer, heat-exchange or heat-storage materials C09K5/00; {cooling of gas-turbine engines F02C7/12}; heat exchange in general, radiators F28) ## Abstract System for circulating the flow of coolant in a vehicle engine cooling system. A dual mode mechanism has an electric motor and an overrunning clutch mechanism which selectively rotate an impeller at a desired speed to circulate the coolant. The impeller is rotated by the electric motor, but can also be selectively rotated by the overrunning clutch mechanism. An electronic control can be utilized to selectively control the electric motor and overrunning clutch, together with control logic. ## Claims ### Claim 1 A temperature control system for a vehicle cooling system comprising: a housing, said housing having an inlet and an outlet for ingress and egress of coolant; an impeller positioned in the housing for circulating the coolant in the vehicle cooling system; a dual mode device attached to said housing for rotating said impeller; said dual mode device comprising an electric motor and an overrunning clutch, both positioned to separately and selectively rotate said impeller. ### Claim 2 (depends on 1) The temperature control system as described in claim 1 wherein said electric motor is a brushless DC motor. ### Claim 3 (depends on 1) The temperature control system as described in claim 1 wherein said impeller comprises a hub member, a plurality of blade members attached to said hub member, and a shroud member. ### Claim 4 (depends on 3) The temperature control system as described in claim 3 wherein said shroud member has at least a portion positioned radially outward of said blade members. ### Claim 5 (depends on 1) The temperature control system as described in claim 1 further comprising a coolant pump ECU and control logic, wherein said coolant pump ECU in combination with said control logic actuate the speed of rotation of said impeller. ### Claim 6 A temperature control system for a vehicle cooling system comprising: a housing; an impeller shaft positioned in the housing; an impeller connected to the shaft for circulating the coolant in the vehicle cooling system; an overrunning clutch in the housing for rotating said impeller shaft; an electric motor positioned in said housing for rotating said impeller; and an ECU and control logic for selectively rotating said impeller by either said electric motor or said overrunning clutch. ### Claim 7 (depends on 6) The temperature control system as described in claim 6 wherein said electric motor is a brushless DC motor. ### Claim 8 (depends on 6) The temperature control system as described in claim 6 wherein said impeller comprises a hub member, a plurality of blade members attached to said hub member, and a shroud member. ### Claim 9 (depends on 8) The temperature control system as described in claim 8 wherein said shroud member has at least a portion positioned radially outward of said blade members. ### Claim 10 (depends on 6) The temperature control system as described in claim 6 wherein said ECU in combination with said control logic actuate the speed of rotation of said impeller and the engagement and disengagement of the overrunning clutch. ### Claim 11 A method for regulating the temperature of cooling fluid in a vehicle engine, said method comprising the steps of: providing an impeller activating device comprising: a housing; an impeller positioned in the housing for circulating the coolant in a vehicle cooling system; a dual mode device attached to said housing for rotating said impeller; said dual mode device comprising an electric motor and an overrunning clutch, both positioned to separately and selectively rotate said impeller; and selectively activating or not activating said dual mode device to rotate said impeller; and whereby the temperature of the cooling fluid is substantially maintained within a desired range of temperature. ### Claim 12 (depends on 11) The method as described in claim 11 wherein said electric motor is a brushless DC electric motor. ### Claim 13 A method for regulating the temperature of cooling fluid in a vehicle engine, said method comprising the steps of: providing an impeller activating device comprising: a housing, said housing having an inlet and an outlet for ingress and egress of coolant; an impeller positioned in the housing for circulating the coolant in a vehicle cooling system; an electric motor attached to said housing for rotating said impeller; an overrunning clutch mechanism in said housing for rotating said impeller; an ECU and control logic for selectively rotating or not rotating said impeller by said electric motor and for selectively engaging and disengaging operation of said overrunning clutch mechanism; selectively activating or not activating said electric motor to regulate the rotation speed of said impeller; and selectively engaging or disengaging said overrunning clutch mechanism to regulate the flow of coolant fluid through said housing; whereby the temperature of the cooling fluid is substantially maintained within a desired range of temperature. ### Claim 14 (depends on 13) The method as described in claim 13 wherein said electric motor is a brushless DC electric motor. ### Claim 15 A dual mode coolant pump assembly comprising: a pulley member which rotates at input speed; an overrunning clutch mechanism having an outer race member connected to said pulley member and having an axially moveable inner race member; a shaft member having a first end and a second end, said first end having a first set of helical splines thereon; an impeller member attached to said second end of said shaft member; said inner race member having an opening therein with a second set of helical splines thereon and is positioned on said first end of said shaft member; an electric motor connected adjacent to said second end of said shaft member for rotation of said shaft member and said impeller member; wherein coolant can be circulated for cooling a vehicle engine. ### Claim 16 (depends on 15) The dual mode coolant pump as described in claim 15 further comprising a control system for selectively operating said electric motor or said overrunning clutch mechanism in order to rotate said shaft member. ### Claim 17 (depends on 15) The dual mode coolant pump as described in claim 15 wherein said overrunning clutch mechanism is adapted to be engaged to rotate said shaft member and disengaged to not rotate said shaft member. ### Claim 18 (depends on 17) The dual mode coolant pump as described in claim 17 further comprising a thrust bearing positioned to contact said inner race member when said overrunning clutch member disengages. ### Claim 19 (depends on 15) The dual mode coolant pump as described in claim 15 wherein said electric member is a brushless DC motor with a rotor member connected to said shaft member. ### Claim 20 (depends on 15) The dual mode coolant pump as described in claim 15 wherein said inner race member comprises a plunger member fixedly attached to said inner race member, and wherein said plunger member is positioned on said first end of said shaft member. ### Claim 21 (depends on 20) The dual mode coolant pump as described in claim 20 wherein said second set of helical splines extends into said plunger member.