COOLING DEVICE FOR VEHICLE

• US 20200130507A1
• Filed: 09/09/2019
• Published: 04/30/2020
• Est. Priority Date: 10/26/2018
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Hashimoto, Susumu, Fushiki, Shunsuke
• Granted Patent: US 11,279,231 B2
• Time in Patent Office: Days
• CPC Class Codes: B60K 11/02 with liquid cooling
• CPC Class Codes: B60K 2025/005 driven by electric motors forming part of the propulsion unit
• CPC Class Codes: B60K 25/00 Auxiliary drives B60K16/00 takes precedence; arrangements of tyre-inflating pumps mounted on vehicles B60C23/10; driving tyre-inflating pumps B60C; driving engine auxiliaries F02B
• CPC Class Codes: B60K 6/24 characterised by the combustion engines
• CPC Class Codes: B60K 6/26 characterised by the motors or the generators
• CPC Class Codes: B60K 6/445 Differential gearing distribution type
• CPC Class Codes: B60L 1/003 to auxiliary motors, e.g. for pumps, compressors
• CPC Class Codes: B60L 1/02 to electric heating circuits
• CPC Class Codes: B60L 2220/42 with use of more than one motor
• CPC Class Codes: B60L 2240/445 Temperature
• CPC Class Codes: B60Y 2200/92 Hybrid vehicles
• CPC Class Codes: B60Y 2306/05 Cooling
• CPC Class Codes: F01P 2005/105 Using two or more pumps
• CPC Class Codes: F01P 2005/125 Driving auxiliary pumps electrically
• CPC Class Codes: F01P 2050/24 Hybrid vehicles
• CPC Class Codes: F01P 3/12 Arrangements for cooling other engine or machine parts
• CPC Class Codes: F01P 3/18 Arrangements or mounting of liquid-to-air heat-exchangers such arrangements on cylinders or cylinder heads F01P3/04; relative to vehicles B60K11/04
• CPC Class Codes: F01P 5/12 Pump-driving arrangements
• CPC Class Codes: F01P 7/14 the coolant being liquid
• CPC Class Codes: F01P 7/164 by varying pump speed
• CPC Class Codes: H02K 7/006 : Structural association of a motor or generator with the drive train of a motor vehicle
• CPC Class Codes: Y02T 10/62 : Hybrid vehicles
• CPC Class Codes: Y02T 10/64 : Electric machine technologies in electromobility

Abstract

A cooling device for vehicle includes: an electric motor; an engine cooling pump; a power-control unit cooling pump; and a differential mechanism. The engine cooling pump is configured to allow an engine cooling water to flow by rotary power of the electric motor. The power-control unit cooling pump is configured to allow a cooling liquid for power control unit to flow by the rotary power of the electric motor. The differential mechanism makes a flowrate of the engine cooling pump different from a flowrate of the power-control unit cooling pump by controlling transmission of the rotary power from the electric motor.

Claims

1. A cooling device for vehicle comprising:

an electric motor;

an engine cooling pump configured to allow an engine cooling water to flow by rotary power of the electric motor;

a power-control unit cooling pump configured to allow a cooling liquid for power control unit to flow by the rotary power of the electric motor; and

a differential mechanism which makes a flowrate of the engine cooling pump different from a flowrate of the power-control unit cooling pump by controlling transmission of the rotary power from the electric motor.

2. The cooling device for vehicle according to claim 1, further comprising:

an oil pump configured to allow an oil for transaxle to flow by the rotary power of the electric motor.

3. The cooling device for vehicle according to claim 2, wherein

the power-control unit cooling pump, the oil pump, and the engine cooling pump are aligned in this order adjacent to the electric motor;

the power-control unit cooling pump, the oil pump, and the engine cooling pump are connected to a transmission shaft connected to the electric motor;

the differential mechanism is positioned between the oil pump and the engine cooling pump and

the engine cooling pump is configured to be separated from the transmission shaft by turning-off of the differential mechanism.

4. The cooling device for vehicle according to claim 1, wherein

the differential mechanism includes an on/off mechanism which switches transmission of the rotary power between the electric motor and the engine cooling pump between on and off.

5. The cooling device for vehicle according to claim 1, wherein

the differential mechanism includes a transmission assembly interposed between the electric motor and the engine cooling pump.

6. A cooling device for vehicle comprising:

an electric motor;

an engine cooling pump configured to allow an engine cooling water to flow by rotary power of the electric motor;

an oil pump configured to allow an oil for transaxle to flow by the rotary power of the electric motor; and

a differential mechanism which makes a flowrate of the engine cooling pump different from a flowrate of the oil pump by controlling transmission of the rotary power from the electric motor.

7. A cooling device for vehicle comprising:

an electric motor;

a power-control unit cooling pump configured to allow a cooling liquid for power control unit to flow by rotary power of the electric motor;

an oil pump configured to allow an oil for transaxle to flow by the rotary power of the electric motor; and

a differential mechanism which makes a flowrate of the power-control unit cooling pump different from a flowrate of the oil pump by controlling transmission of the rotary power from the electric motor.