# US 2014/0190427 A1 · Coolant control valve apparatus

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2014/0190427 A1
- Document ID: US20140190427A1
- Status: Published application
- Kind: A1
- Application number: 14/206,613
- Filed: 2014-03-12
- Published: 2014-07-10
- Earliest claimed: 2011-09-22
- Assignees: Mikuni Corporation
- Applicants: Mikuni Corporation
- Inventors: Kenichiro Nagahama; Toru Tsuchiya; Takumi Oikawa; Masayuki Daikuhara
- Web page: https://patentgrep.com/patent/US20140190427A1

## CPC

- F01P 7/16: by thermostatic control
- F01P 11/16: concerning coolant temperature (F01P11/20 takes precedence)
- F01P 2031/00: Fail safe
- F01P 2060/16: Outlet manifold
- F01P 2070/02: using shape memory alloys
- 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

A coolant control valve apparatus 10 includes a main valve 11 which adjusts a flow rate of a coolant in a main channel 4 to control the flow rate of the coolant in the main channel 4. Further, the coolant control valve apparatus 10 includes a detour channel 67 provided being diverged from the main channel 4 so as to detour the main valve 11. The coolant control valve apparatus 10 includes a valve main body 41 which opens and closes the detour channel 67 and a temperature detection medium 42 which can open and close the valve main body 41 according to a temperature of the coolant. The temperature detection medium 42 is disposed in the diverging part between the detour channel 67 and the bypass channel 5.

## Claims

### Claim 1

A coolant control valve apparatus that controls a flow rate of coolant in a main channel of an engine cooling system including: the main channel which circulates the coolant between an engine and a radiator; and a bypass channel which bypasses the radiator and returns the coolant that is flown out of the engine to the engine, the coolant control valve apparatus comprising:
a valve that controls the flow rate of the coolant in the main channel;
a detour channel provided being diverged from the main channel so as to detour the valve; and
a temperature detection medium that includes a valve main body being moved independently from the valve to open and close the detour channel, and can open and close the valve main body according to a temperature of the coolant, wherein
the temperature detection medium is disposed in a diverging part between the detour channel and the bypass channel.

### Claim 2 (depends on 1)

The coolant control valve apparatus according to claim 1, wherein
the valve is a rotary valve provided with a rotor and includes a controlling means that controls a rotation angle of the rotor, and
the controlling means includes a power transmission mechanism having a gear train.

### Claim 3 (depends on 1)

The coolant control valve apparatus according to claim 1, wherein the temperature detection medium is an on-off valve that opens the valve main body from a closed state according to a change of a detected temperature, and a preset temperature for opening the on-off valve is higher than a preset temperature range for opening the valve.

### Claim 4 (depends on 1)

The coolant control valve apparatus according to claim 1, wherein the temperature detection medium and the valve main body are fail-safe valves that are opened from a closed state according to a change of a detected temperature, and are opened when the temperature of the coolant becomes a predetermined temperature or higher.

### Claim 5 (depends on 1)

The coolant control valve apparatus according to claim 1, wherein
the engine cooling system includes at least one sub channel that circulates the coolant between the engine and a device requiring circulation of the coolant, such as a heater, and
the valve can control a flow rate of the coolant in the sub channel.

### Claim 6 (depends on 2)

The coolant control valve apparatus according to claim 2, wherein the temperature detection medium is an on-off valve that opens the valve main body from a closed state according to a change of a detected temperature, and a preset temperature for opening the on-off valve is higher than a preset temperature range for opening the valve.

### Claim 7 (depends on 2)

The coolant control valve apparatus according to claim 2, wherein the temperature detection medium and the valve main body are fail-safe valves that are opened from a closed state according to a change of a detected temperature, and are opened when the temperature of the coolant becomes a predetermined temperature or higher.