# US 11,305,637 B2 · Vehicle cooling system

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- Number: US 11,305,637 B2
- Document ID: US11305637B2
- Status: Granted
- Kind: B2
- Application number: 16/360,056
- Filed: 2019-03-21
- Published: 2019-09-26
- Granted: 2022-04-19
- Earliest claimed: 2018-03-26
- Assignees: Subaru Corporation; Nidec Tosok Corporation
- Applicants: Subaru Corporation; Nidec Tosok Corporation
- Inventors: Naoki Hiraoka; Tomoya Ozawa; Takashi Asai; Daisuke Murata; Keita Kobayashi; Tomohiro Yasuda; Kenro Takahashi
- Web page: https://patentgrep.com/patent/US11305637B2

## CPC

- B60K 11/02: with liquid cooling
- F01P 7/165: {characterised by systems with two or more loops}
- F01P 3/20: Cooling circuits not specific to a single part of engine or machine (F01P3/22 takes precedence)
- F01P 5/10: Pumping liquid coolant; Arrangements of coolant pumps
- F01P 7/14: the coolant being liquid
- F28F 27/02: for controlling the distribution of heat-exchange media between different channels ({static flow control means in header boxes F28F9/026}; arrangements of guide plates or guide vanes F28F9/22, F28F25/12)
- F01P 2007/146: {using valves}
- B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- 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)
- F28F: DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION (water and air traps, air venting F16)

## Abstract

A vehicle cooling system includes a circulation flow path section which has a first flow path section and a second flow path section, and a solenoid valve which can switch between an open state in which the first flow path section and the second flow path section are connected and a closed state in which the first flow path section and the second flow path section are blocked. The circulation flow path section includes a valve body accommodating section configured to include a first accommodating section and a second accommodating section which connects the first flow path section and the second flow path section in the open state, and a connection flow path section whose one end is connected to the first flow path section. The other end of the connection flow path section opens to the first accommodating section.

## Claims

### Claim 1

A vehicle cooling system comprising:
an object to be cooled, which is mounted on a vehicle;
a circulation flow path section which includes a first flow path section and a second flow path section, and in which a refrigerant for cooling the object to be cooled circulates;
a solenoid valve which includes a valve body, and can switch between an open state in which the first flow path section and the second flow path section are connected and a closed state in which the first flow path section and the second flow path section are blocked by causing the valve body to move in a predetermined direction; and
a pump section configured to cause the refrigerant to circulate in the circulation flow path section, wherein
the circulation flow path section includes:
a valve body accommodating section configured to connect the first flow path section to the second flow path section and to accommodate the valve body, and
a connection flow path section whose one end is connected to the first flow path section,
the valve body accommodating section includes:
a first accommodating section which is positioned on one side in the predetermined direction, and
a second accommodating section which is positioned on another side in the predetermined direction, and connects the first flow path section and the second flow path section in the open state,
the valve body accommodating section is partitioned into the first accommodating section and the second accommodating section by the valve body being fitted into an inside of the valve body accommodating section and by an outer circumferential surface of the valve body contacting with an inner circumferential surface of the valve body accommodating section;
the another end of the connection flow path section opens to the first accommodating section;
the inner circumferential surface of the valve body accommodating section has a cylindrical shape centering on a center axis and extending in the predetermined direction;
the valve body has a cylindrical shape with the outer circumferential surface movable in the predetermined direction while sliding with respect to the inner circumferential surface of the valve body accommodating section;
the valve body accommodating section includes a first hole section and a second hole section;
the first hole section is provided in a bottom wall portion on the another side in the predetermined direction among wall portions defining the valve body accommodating section;
the second hole section is provided in a circumferential wall portion in a radial direction centering on the center axis among the wall portions defining the valve body accommodating section, and connects the second accommodating section and the second flow path section in the open state;
the valve body includes a first pressure receiving surface directed to the one side in the predetermined direction and opposing an inside of the first accommodating section, and a second pressure receiving surface directed to the another side in the predetermined direction and opposing an inside of the first flow path section via an inside of the first hole section in the closed state;
the first pressure receiving surface is a surface of the valve body on the one side in the predetermined direction;
the second pressure receiving surface is a portion of surface of the valve body on the another side in the predetermined direction;
the valve body blocks the first hole section from the one side in the predetermined direction in the closed state; and
the valve body blocks seconds hole section with the outer circumferential surface of the valve body in the closed state.

### Claim 2 (depends on 1)

The vehicle cooling system according to claim 1,
wherein
the first pressure receiving surface is a flat surface.

### Claim 3 (depends on 1)

The vehicle cooling system according to claim 1,
wherein
an area of the first pressure receiving surface is larger than an area of the second pressure receiving surface.

### Claim 4 (depends on 2)

The vehicle cooling system according to claim 2,
wherein
an area of the first pressure receiving surface is larger than an area of the second pressure receiving surface.

### Claim 5 (depends on 1)

The vehicle cooling system according to claim 1, further comprising:
a cooling section configured to cool the refrigerant.

### Claim 6 (depends on 1)

The vehicle cooling system according to claim 1, wherein the object to be cooled is a driving unit for driving the vehicle.