Cooling water control valve device

Patent metadata

Field	Value
Publication number	US-10900408-B2
Application number	US-201916676094-A
Country	US
Kind code	B2
Filing date	Nov 6, 2019
Priority date	May 9, 2017
Publication date	Jan 26, 2021
Grant date	Jan 26, 2021

Abstract

A valve is configured to control a flow amount of cooling water flowing in a main passage. A detour passage connects an engine to the main passage through the valve. A failsafe valve includes a valve body, which operates independently from the valve and enables the detour passage to open or close, and a temperature detection medium which manipulates the valve body based on a temperature of cooling water and enables the detour passage to open or close. A branch point is point at which an inlet point in which cooling water from the engine flows is branched to a bypass passage and the detour passage. The temperature detection medium does not protrude to the branch portion and is housed in the detour passage.

First claim

The invention claimed is:

1. A cooling water control valve device that controls a flow amount of cooling water, which flows through a main passage of an engine cooling system, the engine cooling system including a main passage, through which cooling water flows from an engine to a radiator, and a bypass passage, which bypasses the radiator and is connected to the engine to return cooling water, which flows from the engine, to the engine, the cooling water control valve device comprising:
a valve configured to control a flow amount of cooling water flowing through the main passage;
a detour passage that bypasses the valve and connects the engine to the main passage; and
a failsafe valve including
a valve body operational individually from the valve and configured to open and close the detour passage and
a temperature detection medium configured to manipulate the valve body according to a temperature of cooling water to enable to open and close the detour passage, wherein

a branch portion is a portion at which an inflow port, into which cooling water from the engine flows, is branched into the bypass passage and the detour passage, and
the temperature detection medium is entirely accommodated in the detour passage without protruding into the branch portion.

2. A cooling water control valve device that controls a flow amount of cooling water, which flows through a main passage of an engine cooling system, the engine cooling system including a main passage, through which cooling water flows from an engine to a radiator, and a bypass passage, which bypass the radiator and is connected to the engine to return cooling water, which flows from the engine, to the engine, the cooling water control valve device comprising:
a valve configured to control a flow amount of cooling water flowing through the main passage;
a detour passage that bypasses the valve and connects the engine to the main passage; and,
a failsafe valve including
a valve body operational individually from the valve and configured to open and close the detour passage and
a temperature detection medium configured to manipulate the valve body according to a temperature of cooling water to enable to open and close the detour passage, wherein

the temperature detection medium is provided at a position which is communicated to the inlet port and the bypass passage and is different from a channel directed from an inlet port, in which cooling water from the engine flows, to the bypass passage.

3. A cooling water control valve device that controls a flow amount of cooling water, which flows through a main passage of an engine cooling system, the engine cooling system including a main passage, through which cooling water flows from an engine to a radiator, and a bypass passage, which bypasses the radiator and is connected to the engine to return cooling water, which flows from the engine, to the engine, the cooling water control valve device comprising:
a valve configured to control a flow amount of cooling water flowing through the main passage;
a detour passage that bypasses the valve and connects the engine to the main passage; and
a failsafe valve including
a valve body operational individually from the valve and configured to open and close the detour passage and
a temperature detection medium configured to manipulate the valve body according to a temperature of cooling water to enable to open and close the detour passage, wherein

a bypass passage opening, which is an inlet port of the bypass passage, and the temperature detection medium are equipped in this order toward the detour passage from an inlet port, in which cooling water from the engine flows.

4. A cooling water control valve device that controls a flow amount of cooling water, which flows through a main passage of an engine cooling system, the engine cooling system including a main passage, through which cooling water flows from an engine to a radiator, and a bypass passage, which bypasses the radiator and is connected to the engine to return cooling water, which flows from the engine, to the engine, the cooling water control valve device comprising:
an inlet port that is provided among the engine, the main passage and the bypass passage and into which cooling water from the engine flows;
a main passage opening that is connected to the main passage and into which cooling water to the main passage flows;
a bypass passage opening that is connected to the bypass passage and into which cooling water to the bypass passage flows;
a main channel that connects the inlet port to the main passage opening;
a bypass channel that connects the inlet port to the bypass passage opening;
a housing that includes a detour passage that bypass a valve and connects the bypass channel to the main passage;
the valve that is housed in the housing and configured to control a flow amount of cooling water flowing from the inlet port to the main passage; and
a failsafe valve including
a valve body operational individually from the valve and configured to open and close the detour passage and
a temperature detection medium configured to manipulate the valve body according to a temperature of cooling water to enable to open and close the detour passage, wherein

the temperature detection medium is housed in the detour passage without protruding the bypass channel.

5. The cooling water control valve device according to claim 4 , wherein
the temperature detection medium is provided at a position, which is communicated to the inlet port and the bypass passage opening, and is different from a channel connecting the inlet port to the bypass passage opening.

6. The cooling water control valve device according to claim 4 , wherein
the bypass passage opening is located closer to the inlet port than the temperature detection medium in a passage, which is directed from the inlet port to the main passage through the bypass channel and the detour passage.

7. The cooling water control valve device according to claim 4 , wherein
the temperature detection medium is provided at a position which is at a distance equal to or more than a predetermined distance from the bypass channel, which is a shortest path connecting the inlet port to the bypass passage opening.

8. The cooling water control valve device according to claim 1 , wherein
the temperature detection medium includes a temperature sensitive portion containing a thermowax.

Assignees

• Denso Corp

Inventors

• Imasaka Yusuke

Classifications

• F01P2007/146

  using valves · CPC title

• F01P11/16

  concerning coolant temperature (F01P11/20 takes precedence) · CPC title

• F01P2060/04

  Lubricant cooler · CPC title

• F01P7/165 Primary

  characterised by systems with two or more loops · CPC title

• F01P2060/08

  Cabin heater · CPC title