ENGINE SYSTEM HAVING COOLANT CONTROL VALVE

• US 20180051620A1
• Filed: 12/13/2016
• Published: 02/22/2018
• Est. Priority Date: 08/16/2016
• Status: Active Grant

• Current Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Original Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Inventors: LEE, Hyo Jo, HAN, Sang Phil
• Granted Patent: US 10,161,291 B2
• Time in Patent Office: Days
• CPC Class Codes: F01P 11/028 Deaeration devices
• CPC Class Codes: F01P 11/16 concerning coolant temperature F01P11/20 takes precedence
• CPC Class Codes: F01P 2003/006 the liquid being oil
• CPC Class Codes: F01P 2003/028 Cooling cylinders and cylinder heads in series
• CPC Class Codes: F01P 2007/146 using valves
• CPC Class Codes: F01P 2060/00 Cooling circuits using auxiliaries
• CPC Class Codes: F01P 2060/04 Lubricant cooler
• CPC Class Codes: F01P 2060/08 Cabin heater
• CPC Class Codes: F01P 2060/16 Outlet manifold
• CPC Class Codes: F01P 2060/18 Heater
• CPC Class Codes: F01P 3/02 Arrangements for cooling cylinders or cylinder heads
• CPC Class Codes: F01P 3/20 Cooling circuits not specific to a single part of engine or machine F01P3/22 takes precedence
• CPC Class Codes: F01P 7/14 the coolant being liquid
• CPC Class Codes: F01P 7/165 characterised by systems with two or more loops
• CPC Class Codes: F02M 26/32 Liquid-cooled heat exchangers
• CPC Class Codes: F16K 1/00 Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces in combination with sliding valves F16K3/246, F16K3/267 ; diaphragm valves F16K7/00
• CPC Class Codes: F16K 11/163 only turns
• CPC Class Codes: F16K 11/18 with separate operating movements for separate closure members
• CPC Class Codes: F16K 17/383 the valve comprising fusible, softening or meltable elements, e.g. used as link, blocking element, seal, closure plug F16K17/386 takes precedence

Abstract

An engine system having a coolant control valve device may include valves that distribute coolant that is injected into a coolant inflow chamber to coolant demand elements, respectively; a driver that operates each of the valves; a safety valve that bypasses coolant that is operated by a coolant temperature to be injected into the coolant inflow chamber; and a degassing member that collects coolant including a bubble, wherein a degassing passage that is opened or closed by operation of the safety valve is formed.

Claims

1. An engine system having a coolant control valve device, the engine system comprising:

valves that distribute coolant that is injected into a coolant inflow chamber to coolant demand elements, respectively;

a driver that operates each of the valves;

a safety valve that bypasses coolant that is configured to be operated by a coolant temperature to be injected into the coolant inflow chamber; and

a degassing member that collects coolant including a bubble,

wherein a degassing passage that is configured to be opened or closed by operation of the safety valve is formed.

2. The engine system of claim 1, wherein the safety valve opens or closes an emergency passage, and the degassing passage is connected with the emergency passage.

3. The engine system of claim 2, wherein the safety valve includes:

a body having a wax chamber therein and having an external circumference that opens or closes the emergency passage and the degassing passage;

a piston that penetrates a first side of the body to be inserted into the wax chamber;

a wax that is filled in the wax chamber and that is expanded or contracted by coolant that is injected into the coolant inflow chamber to push the piston to an outside thereof or to pull the piston to an inside thereof; and

an elastic member that elastically supports the body, wherein the body closes the emergency passage.

4. The engine system of claim 1, wherein coolant, having passed through a cylinder head and a cylinder block of an engine is supplied to the coolant inflow chamber.

5. The engine system of claim 4, wherein the coolant demand elements comprise a heater core, an exhaust-gas recirculation (EGR) cooler, an oil cooler, or a radiator,

wherein the valves comprise:

a first valve that opens or closes a first passage that supplies coolant to the heater core and the EGR cooler;

a second valve that opens or closes a second passage that supplies coolant to the oil cooler;

or

a third valve that opens or closes a third passage that supplies coolant to the radiator.

6. The engine system of claim 5, wherein the driver includes:

a cam having a cam profile that contacts with front end portions of the first, second, and third valves;

an elastic member that elastically supports rear end portions of the first, second, and third valves, wherein the front end portions of the first, second, and third valves contact with the cam profile; and

a torque source that rotates the cam to enable the cam profile to push the front end portions of the first, second, and third valves to thus enable the first, second, and third valves to open or close the first, second, and third passages, respectively.

7. The engine system of claim 5, wherein the safety valve is configured to be operated by a coolant temperature of the coolant inflow chamber to bypass coolant of the coolant inflow chamber to a radiator side.

8. The engine system of claim 5, further including:

a pressure cap that maintains an internal pressure of the degassing member to a predetermined value or more and that discharges a bubble to an outside thereof; and

a coolant pump that recirculates coolant that is circulated from the degassing member and the coolant demand elements to the coolant control valve device.

9. The engine system of claim 7, wherein the torque source is a motor, and

the engine system further includes a control device that is configured to control rotation of the motor according to a driving condition.

10. The engine system of claim 5, further including a valve housing that has the first, second, and third passages and the first, second, and third valves that open or close the first, second, and third passages therein and in which the coolant inflow chamber is formed.

11. An engine system having a coolant control valve device, the engine system comprising:

valves that are disposed at a valve housing to distribute coolant that is injected into a coolant inflow chamber to coolant demand elements, respectively;

a driver that lifts each of the valves to enable the valves to open or close passages;

a safety valve that is disposed at an emergency passage to bypass coolant that is configured to be operated by a coolant temperature to be injected into the coolant inflow chamber to a radiator side; and

a degassing member that collects coolant including a bubble,

wherein a degassing passage is formed that transfers a bubble that is included in coolant that is connected with the degassing member at an internal side surface of the emergency passage to pass through the emergency passage to the degassing member.

12. The engine system of claim 11, wherein the safety valve includes:

a body having a wax chamber therein and having an external circumference that opens or closes the emergency passage and the degassing passage;

a piston that penetrates a first side of the body to be inserted into the wax chamber;

a wax that is filled in the wax chamber and that is expanded or contracted by coolant that is injected into the coolant inflow chamber to push the piston to an outside thereof or to pull the piston to an inside thereof; and

an elastic member that elastically supports the body, wherein the body closes the emergency passage.

13. The engine system of claim 11, wherein the driver includes:

a cam having a cam profile that contacts with front end portions of each of the valves;

an elastic member that elastically supports each of rear end portions of the valves, wherein the front end portions of each of the valves contact with the cam profile; and

a torque source that rotates the cam to enable the cam profile to push the front end portions of the valves to thus enable the valves to open or close the passages, respectively.

14. The engine system of claim 11, wherein the coolant demand elements comprise a heater core, an exhaust-gas recirculation (EGR) cooler, an oil cooler, or a radiator,

wherein the valves comprise:

a first valve that opens or closes a first passage that supplies coolant to the heater core and the EGR cooler;

a second valve that opens or closes a second passage that supplies coolant to the oil cooler;

or

a third valve that opens or closes a third passage that supplies coolant to the radiator.