EP3610143A2 - A thermostat assembly with double flow enabled pressure balanced sleeve valve structure - Google Patents

A thermostat assembly with double flow enabled pressure balanced sleeve valve structure

Info

Publication number
EP3610143A2
EP3610143A2 EP18832296.0A EP18832296A EP3610143A2 EP 3610143 A2 EP3610143 A2 EP 3610143A2 EP 18832296 A EP18832296 A EP 18832296A EP 3610143 A2 EP3610143 A2 EP 3610143A2
Authority
EP
European Patent Office
Prior art keywords
sleeve valve
flow
valve
thermostat assembly
double
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP18832296.0A
Other languages
German (de)
French (fr)
Other versions
EP3610143A4 (en
Inventor
Hikmet KANBUR
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kirpart Otomotiv Parcalari Sanayi ve Ticaret AS
Original Assignee
Kirpart Otomotiv Parcalari Sanayi ve Ticaret AS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kirpart Otomotiv Parcalari Sanayi ve Ticaret AS filed Critical Kirpart Otomotiv Parcalari Sanayi ve Ticaret AS
Publication of EP3610143A2 publication Critical patent/EP3610143A2/en
Publication of EP3610143A4 publication Critical patent/EP3610143A4/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00—Controlling of coolant flow
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—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
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/44—Details of seats or valve members of double-seat valves
    • F16K1/443—Details of seats or valve members of double-seat valves the seats being in series
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
    • F16K3/22—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution
    • F16K3/24—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members
    • F16K3/246—Combination of a sliding valve and a lift valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/002—Actuating devices; Operating means; Releasing devices actuated by temperature variation
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/01—Control of temperature without auxiliary power
    • G05D23/02—Control of temperature without auxiliary power with sensing element expanding and contracting in response to changes of temperature
    • G05D23/021—Control of temperature without auxiliary power with sensing element expanding and contracting in response to changes of temperature the sensing element being a non-metallic solid, e.g. elastomer, paste
    • G05D23/022—Control of temperature without auxiliary power with sensing element expanding and contracting in response to changes of temperature the sensing element being a non-metallic solid, e.g. elastomer, paste the sensing element being placed within a regulating fluid flow

Definitions

  • thermostat assembly More specifically, thermostat assembly with pressure balanced sleeve type valve which controls the circulation of the coolant fluid of the internal combustion engine.
  • thermostat assemblies are main control devices of the cooling circulation units which are used to control the engine temperature during the combustion. Coolant circulating the engine block and cylinder heads absorbs the heat caused by the combustion from the engine block and cylinder heads, this absorption causes an increase on the temperature of coolant. Regarding the temperature of the coolant, thermostat assemblies regulate the flow rates through the sub-circuit outlets (radiator and bypass outlets) to keep the temperature of the coolant among the desired range.
  • Required actuating force of poppet type valve thermostat assembly should be at least equal to hydraulic force applied by coolant on valve plate which is equal to coolant pressure multiplies by valve projection area. In order to achieve low pressure drops, projection area of the valve should be increased which will result with a significant increase of required actuating force on poppet type valve structure.
  • Required actuating force is created by wax based actuators or electro mechanical drives. Achieving high actuating force needs bigger actuators which will have a significant cost increase and loss of compactness of product.
  • slider valve thermostat assembly which is in fact a plate shaped valve which has the opening window or holes allowing the coolant pass through and which make a sliding movement on a seat created whether on the body or created by another seat structure. Even though this type allows bigger projection area of valve to achieve lower pressure drops with lower activation force, it is not a reliable and economical solution by reason of complex valve structure needs and wearing concern due to sliding under high hydraulic loads.
  • Sleeve type valve structure has pressure balanced feature which continuously has same cross section during opening closing movement of valve and which allows to increase the size of valve for achieving low pressure drop at high flow rates with low actuating force requirement with respect to poppet type structure.
  • known structure of sleeve type valve has high cost due to complexity of mechanism and a significant leakage amount through valve when it is closed since metal to metal contact is preferred due to long reliability expectation.
  • FIG. 1 Cross section view of thermostat assembly with sleeve valve structure which is illustrating the known situation of the art and imaginative flow when radiator outlet is closed.
  • FIG. 1 Cross section view of thermostat assembly with sleeve valve structure which is illustrating the known situation of the art and imaginative flow when radiator outlet is open.
  • FIG. 3 Cross section view of one embodiment of thermostat assembly with double flow sleeve valve structure and imaginative flow when radiator outlet is closed.
  • FIG. 4 Cross section view of one embodiment of thermostat assembly with double flow sleeve valve structure and imaginative flow when radiator outlet is open.
  • Figure 5 3D view of sleeve structure showing the flow windows
  • FIG. 6 3D view of thermostat assembly with double flow pressure balanced sleeve valve structure
  • FIG. 7 3D view of thermostat assembly with double flow pressure balanced sleeve valve structure
  • Figure 8 Pop-up view of one embodiment of thermostat assembly with double flow pressure balanced sleeve valve structure
  • FIG. 9 Cross-section view of one embodiment of thermostat assembly with double flow pressure balanced sleeve valve showing bypass output when radiator outlet is closed
  • FIG. 10 Cross-section view of one embodiment of thermostat assembly with double flow pressure balanced sleeve valve structure showing bypass output when radiator outlet is open
  • Figure 11 Cross-section view of one embodiment of thermostat assembly with double flow pressure balanced sleeve valve structure when radiator outlet is closed
  • FIG. 12 Cross-section view of one embodiment of thermostat assembly with double flow pressure balanced sleeve valve structure when radiator outlet is open imaginative flow curves showing the inner and outer flow
  • Figure 13 Pop-up view of sleeve valve and valve seat
  • thermostat assembly with double flow enabled pressure balanced sleeve valve structure (1) for cooling circulation units of internal combustion engines to decrease pressure drops with an additional flow through a valve and to decrease the required force for opening the valve comprises at least an inlet (I), a radiator outlet (R), a bypass outlet (B), a main body (D), an actuator (T), a spring (S), a spring retainer (G) and characterized by;
  • At least one sleeve valve (2) which helps controlling the flow through radiator outlet (R),
  • At least one valve seat (3) which is installed inside the sleeve valve (2), provides double contact face with the sleeve valve (2) from inside and outside of it and controls the inner flow in addition to the outer flow through the radiator outlet (R),
  • At least one pressure balancing window (221) providing an inlet through inside
  • At least one second sealing element (32) for sealing the inner flow • At least one second sealing element (32) for sealing the inner flow
  • thermostat assembly with double flow enabled pressure balanced sleeve valve structure (1) for cooling circulation units of internal combustion engines to decrease pressure drops with an additional flow through a valve and to decrease the required force for opening the valve comprises at least inlet (I), a radiator outlet (R), a bypass outlet (B), a main body (D), an actuator , a spring (S), a spring retainer (G) and characterized by;
  • At least one sleeve valve (2) comprises upper body (21) and lower body (22),
  • At least one valve seat (3) which is installed inside the sleeve valve (2), provides a first contact face with the sleeve valve (2) from inside of it and controls the inner flow
  • At least one inclined region (4) of main body (D) which provides a second contact face with the sleeve valve (2) from outside of it by constricting and which controls the outer flow.
  • At least one upper body (21) consist of bypass valve (211), inner guiding protrusion (212), outer guiding protrusion (213) and first sealing element (214),
  • At least three inner guiding protrusion (212) which is protruded from an inner side of upper body (21) to guide for valve seat (3).
  • At least one lower body (22) consist of pressure balancing hole (221) and actuator guide hole (222),
  • At least one pressure balancing window (221) which is form of a hollow to allow the flow inlet and to balance pressure of the flow
  • At least one pressure balancing channel (31) which provide a passage on outer diameter of inner part of valve seat (3) for allowing a coolant passage while a guiding motion of sleeve valve (2) and providing a uniform flow.
  • Thermostat assembly with double flow enabled pressure balanced sleeve valve structure (1) which is used as a component of the cooling system of an internal combustion engine which allows inner flow in addition to outer flow so as to achieve lower pressure drops with higher flow rates and could basically be considered as concentric double valve structure allowing double port opening.
  • Actuator (T) is placed to the lower body (22) by means of guide hole (222). Then, by positioning of pressure balancing channel (31) above the actuator (T), upper body (21) guides valve seat (3) by means of inner guiding protrusion (212). Upper body (21) and lower body (22) are assembled by welding. This structuring and its inner section is mounted by engaging the hole in upper end of valve seat (3) and guiding protrusion of main body (P). Then spring (S) is placed onto the lower end of actuator (T) and stabilized in the main body (D) by spring retainer (G).
  • a second sealing element (32) is assembled to the valve seat (3) so as to provide sealing when radiator outlet (R) is closed.
  • actuator (T) starts to lift its piston.
  • This lift force starts to move the sleeve valve (2) downward and this causes port opening both inside (where the inner surface of sleeve valve (2) and sealing element of valve seat (3) are in contact.) and outside (where a seat construction of valve seat (3) and top end point of sleeve valve (2) are in contact.). Opening double port simultaneously provides a pressure balanced feature as well as low pressure drops with high flow rates.
  • radiator outlet (R) is closed, the end point of sleeve valve (2) is seated by valve seat' s (3) seat structure.
  • second sealing element (32) provides leak tightness for inner side yet there is no sealing precaution for outer side.
  • the main body (D) has radiator outlet (R), inlet (G) and bypass outlet (B).
  • thermostat assembly with double flow enabled pressure balanced sleeve valve structure (1) is an assembly of valve seat (3) and sleeve valve (2) by a binding or fastening method.
  • the main body (D) provides housing for thermostat assembly with double flow enabled pressure balanced sleeve valve structure (1) and produced by preferably a plastic material. Bottom surface of main body (D) is configured accordingly where the thermostat assembly with double flow enabled pressure balanced sleeve valve structure (1) is mounted besides there is an inlet (I) on the bottom surface.
  • bypass outlet (B) is shaped as a hose preferably produced by plastic and assembled to the main body (D) preferably by welding on bypass outlet window's (W) side.
  • the end point of bypass outlet (B) is suitably shaped so as to allow hose connection.
  • the radiator outlet (R) is positioned on the end point of main body (D) and also has hose geometry protruded from main body (D). The end point of radiator outlet (R) is also has suitable shape allowing connection.
  • main body (P) There is a guiding protrusion of main body (P) inside of a space inside of the main body (2) which is protruded through inner side from top side of inner side of main body (D).
  • the guiding protrusion of main body (P) provides correct installation of double action pressure balanced sleeve valve structure (1) by intertwining the inner part of valve seat (3).
  • the double flow enabled pressure balanced sleeve valve structure (1) is obtained by assembling valve seat (3) and sleeve valve (2).
  • Second sealing element (32) is assembled around valve seat (3) which is produced by an elastomer compound.
  • First sealing element (214) is also assembled around the sleeve valve (2) which is also produced by an elastomer compound.
  • Sleeve valve (2) is embodied by assembly of upper body (21) and lower body (22). This assembly has a space inside wherein the inner part of valve seat (3) and actuator (T) is placed.
  • valve seat (3) The outer part of valve seat (3) is shaped inside of the main body (D), wherein the sleeve valve (2) and main body (D) are in contact when the radiator output (R) is closed which called inclined region (4).
  • Valve seat (3) has an inner part which is assembled inside of sleeve valve (32) and which provides a seat for sleeve valve (2) from inner surface.
  • There are at least six pressure balancing channels (31) which are shaped to help providing uniform flow.
  • Sleeve valve (2) upper body (21) has at least a curtain type bypass valve (211) protruded from the outer side of upper body (21) so as to control the flow through bypass outlet (B), at least three and preferably four inner guiding protrusions (212) protruded from the inner side of upper body (21) which provide a guide for valve seat (3) and flow channels and at least an outer guiding protrusion (213) which provides correct assembly of sleeve valve (2) and valve seat (3) inside of the main body (D).
  • a curtain type bypass valve 211
  • inner guiding protrusions 212 protruded from the inner side of upper body (21) which provide a guide for valve seat (3) and flow channels and at least an outer guiding protrusion (213) which provides correct assembly of sleeve valve (2) and valve seat (3) inside of the main body (D).
  • Sleeve valve (2) lower body (22) has at least four pressure balancing windows (221) which are hollows on the bottom surface allowing the flow inlet, at least a actuator guide hole (222) which is a hollow on the bottom surface has diameter slightly greater than the diameter of a rod part of actuator (T).
  • Pressure balancing window (221) provides controlling a parallel flow according to a motion axis of sleeve valve (2).
  • Upper body (21) and lower body (22) are produced by preferably plastic material and preferably assembled each other by welding. Inner part of double contact faced valve seat (3) and actuator (T) are placed inside of sleeve valve (2) then sleeve valve upper body (21) and lower body (22) are welded. So that double flow enabled pressure balanced sleeve valve structure (1) is obtained.
  • This assembly placed into main body (D) as so the guiding protrusion of main body (P) pass through the hollow of inner part of double contact faced valve seat (3).
  • There is a hole on the bottom of the guiding protrusion of main body (P) which' s inner diameter is slightly greater than the outer diameter of the pin of actuator (T). The pin of actuator (T) is guided by this hole.
  • spring (S) is placed so as encircling the rod of actuator (T) and locked by spring retainer (G).
  • Sleeve valve (2) comprises upper body (21) and lower body (22) and controls the flow through both radiator outlet (R) and bypass outlet (B).
  • both the port between main body (D) and outer side of sleeve valve (2) and the port between double contact faced valve seat (3) and inner side of sleeve valve (2) is opened simultaneously.
  • Valve seat (3) which controls the flow through the radiator outlet (R) is assembled inside of the sleeve valve (2).
  • Valve seat (3) has a separate inner part of valve seat (3) which is a hollowed cylinder protruded above and which' s inner diameter is greater than the guiding protrusion of main body (P) and which' s outer diameter is small enough to allow intertwine with sleeve valve (2).
  • Inner part of valve seat (3) has preferably six pressure balancing channels (31) which provide uniform flow.
  • a second sealing element (2) is assembled so as to provide sealing.
  • valve seat (3) is shaped on the inside of main body (D) and an inner part of valve seat (3) is assembled inside of the sleeve valve (2).
  • a curtain type bypass valve (211) is protruded from the outer side of the sleeve valve (2) upper body (21) which controls the flow through bypass outlet (B). While the force of actuator causing port opening through radiator outlet (R), by pass outlet is being closed by bypass valve (211) simultaneously.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Temperature-Responsive Valves (AREA)
  • Lift Valve (AREA)

Abstract

This invention relates to a Thermostat assembly with double flow enabled pressure balanced sleeve valve structure (1) for cooling circulation systems of internal combustion engines which comprises a double flow sleeve valve (2) and valve seat (3) allowing double port opening simultaneously so as to provide low pressure drops with high flow rates. The valve structure is an assembly of a sleeve valve (32) and a concentric valve seat (3) which is an easily applicable leak-proof structure with sealing elements (214, 32)

Description

A THERMOSTAT ASSEMBLY WITH DOUBLE FLOW ENABLED PRESSURE BALANCED SLEEVE VALVE STRUCTURE
Technological Area
This invention relates to a thermostat assembly. More specifically, thermostat assembly with pressure balanced sleeve type valve which controls the circulation of the coolant fluid of the internal combustion engine.
Known Situation of the Art
As is known, thermostat assemblies are main control devices of the cooling circulation units which are used to control the engine temperature during the combustion. Coolant circulating the engine block and cylinder heads absorbs the heat caused by the combustion from the engine block and cylinder heads, this absorption causes an increase on the temperature of coolant. Regarding the temperature of the coolant, thermostat assemblies regulate the flow rates through the sub-circuit outlets (radiator and bypass outlets) to keep the temperature of the coolant among the desired range.
Significant criterion to implement an optimal thermostat mechanism is achieving low pressure drops with lower actuating force requirement in desired flow rates. Different types of valve structures are used so as to implement this optimization; such as poppet type, slider type and sleeve type.
Required actuating force of poppet type valve thermostat assembly should be at least equal to hydraulic force applied by coolant on valve plate which is equal to coolant pressure multiplies by valve projection area. In order to achieve low pressure drops, projection area of the valve should be increased which will result with a significant increase of required actuating force on poppet type valve structure. Required actuating force is created by wax based actuators or electro mechanical drives. Achieving high actuating force needs bigger actuators which will have a significant cost increase and loss of compactness of product.
Another apparent type is slider valve thermostat assembly, which is in fact a plate shaped valve which has the opening window or holes allowing the coolant pass through and which make a sliding movement on a seat created whether on the body or created by another seat structure. Even though this type allows bigger projection area of valve to achieve lower pressure drops with lower activation force, it is not a reliable and economical solution by reason of complex valve structure needs and wearing concern due to sliding under high hydraulic loads.
Sleeve type valve structure has pressure balanced feature which continuously has same cross section during opening closing movement of valve and which allows to increase the size of valve for achieving low pressure drop at high flow rates with low actuating force requirement with respect to poppet type structure. Unfortunately known structure of sleeve type valve has high cost due to complexity of mechanism and a significant leakage amount through valve when it is closed since metal to metal contact is preferred due to long reliability expectation.
Brief Description of the Invention
In this invention; basic structure of sleeve valve structure is developed to achieve zero leakage through valve when it is closed by using a simple mechanical structure which increase reliability and reduce the cost of product besides achieve lower pressure drops with higher flow rates while enabling an additional flow through valve.
Detailed Description of Invention
The invention is explained below and there are some drawings. The drawings described herein are for illustrative purposes of mentioned embodiments. Figure 1 Cross section view of thermostat assembly with sleeve valve structure which is illustrating the known situation of the art and imaginative flow when radiator outlet is closed.
Figure 2 Cross section view of thermostat assembly with sleeve valve structure which is illustrating the known situation of the art and imaginative flow when radiator outlet is open.
Figure 3 Cross section view of one embodiment of thermostat assembly with double flow sleeve valve structure and imaginative flow when radiator outlet is closed.
Figure 4 Cross section view of one embodiment of thermostat assembly with double flow sleeve valve structure and imaginative flow when radiator outlet is open.
Figure 5 3D view of sleeve structure showing the flow windows
Figure 6 3D view of thermostat assembly with double flow pressure balanced sleeve valve structure
Figure 7 3D view of thermostat assembly with double flow pressure balanced sleeve valve structure
Figure 8 Pop-up view of one embodiment of thermostat assembly with double flow pressure balanced sleeve valve structure
Figure 9 Cross-section view of one embodiment of thermostat assembly with double flow pressure balanced sleeve valve showing bypass output when radiator outlet is closed
Figure 10 Cross-section view of one embodiment of thermostat assembly with double flow pressure balanced sleeve valve structure showing bypass output when radiator outlet is open Figure 11 Cross-section view of one embodiment of thermostat assembly with double flow pressure balanced sleeve valve structure when radiator outlet is closed
Figure 12 Cross-section view of one embodiment of thermostat assembly with double flow pressure balanced sleeve valve structure when radiator outlet is open imaginative flow curves showing the inner and outer flow
Figure 13 Pop-up view of sleeve valve and valve seat
Figure 14 3D view of upper body
Figure 15 3D view of lower body
Figure 16 3D view of valve seat
Figure 17 Cross-section view of valve seat
There are references below and here are descriptions of references:
1 Thermostat assembly with double flow enabled pressure balanced sleeve valve structure
2 Sleeve valve
21 Upper body
211 Bypass valve
212 Inner guiding protrusion
213 Outer guiding protrusion
214 First sealing element
22 Lower body
221 Pressure balancing window
222 Actuator guide hole
3 Valve seat
31 Pressure balancing channel
32 Second sealing element
4 Inclined region
R Radiator outlet
B Bypass outlet
I Inlet
D Main body W Bypass outlet window
P Guiding protrusion of main body
T Actuator
S Spring
G Spring retainer
In one embodiment of thermostat assembly with double flow enabled pressure balanced sleeve valve structure (1) for cooling circulation units of internal combustion engines to decrease pressure drops with an additional flow through a valve and to decrease the required force for opening the valve, comprises at least an inlet (I), a radiator outlet (R), a bypass outlet (B), a main body (D), an actuator (T), a spring (S), a spring retainer (G) and characterized by;
• At least one sleeve valve (2) which helps controlling the flow through radiator outlet (R),
• At least one valve seat (3) which is installed inside the sleeve valve (2), provides double contact face with the sleeve valve (2) from inside and outside of it and controls the inner flow in addition to the outer flow through the radiator outlet (R),
• At least one pressure balancing window (221) providing an inlet through inside,
• At least one actuator guide hole (222) to provide guiding of the actuator (T),
• At least one second sealing element (32) for sealing the inner flow,
In another embodiment of thermostat assembly with double flow enabled pressure balanced sleeve valve structure (1) for cooling circulation units of internal combustion engines to decrease pressure drops with an additional flow through a valve and to decrease the required force for opening the valve, comprises at least inlet (I), a radiator outlet (R), a bypass outlet (B), a main body (D), an actuator , a spring (S), a spring retainer (G) and characterized by;
• At least one sleeve valve (2) comprises upper body (21) and lower body (22),
• At least one valve seat (3) which is installed inside the sleeve valve (2), provides a first contact face with the sleeve valve (2) from inside of it and controls the inner flow,
• At least one inclined region (4) of main body (D) which provides a second contact face with the sleeve valve (2) from outside of it by constricting and which controls the outer flow.
• At least one upper body (21) consist of bypass valve (211), inner guiding protrusion (212), outer guiding protrusion (213) and first sealing element (214),
• At least one bypass valve (211), which is protruded from an outer side of upper body (21) to control the flow through bypass outlet (B),
• At least three inner guiding protrusion (212) which is protruded from an inner side of upper body (21) to guide for valve seat (3).
• At least one outer guiding protrusion (213) which provides correct
assembly of sleeve valve (2) and valve seat (3) inside of the main body (D),
• At least one first sealing element (214) for sealing the outer flow,
• At least one lower body (22) consist of pressure balancing hole (221) and actuator guide hole (222),
• At least one pressure balancing window (221) which is form of a hollow to allow the flow inlet and to balance pressure of the flow,
• At least one actuator guide hole (222) to provide guiding of the actuator (T),
• At least one pressure balancing channel (31) which provide a passage on outer diameter of inner part of valve seat (3) for allowing a coolant passage while a guiding motion of sleeve valve (2) and providing a uniform flow. • At least one second sealing element (32) for sealing the inner flow,
Thermostat assembly with double flow enabled pressure balanced sleeve valve structure (1) which is used as a component of the cooling system of an internal combustion engine which allows inner flow in addition to outer flow so as to achieve lower pressure drops with higher flow rates and could basically be considered as concentric double valve structure allowing double port opening. By implementing this invention, it is achieved to obtain an easily applicable, leak proof thermostat assembly with low pressure drops with high flow rates.
Actuator (T) is placed to the lower body (22) by means of guide hole (222). Then, by positioning of pressure balancing channel (31) above the actuator (T), upper body (21) guides valve seat (3) by means of inner guiding protrusion (212). Upper body (21) and lower body (22) are assembled by welding. This structuring and its inner section is mounted by engaging the hole in upper end of valve seat (3) and guiding protrusion of main body (P). Then spring (S) is placed onto the lower end of actuator (T) and stabilized in the main body (D) by spring retainer (G).
A second sealing element (32) is assembled to the valve seat (3) so as to provide sealing when radiator outlet (R) is closed. There is a hollow on the center of the bottom side of valve seat (3) which provides a guiding for actuator (T) shown in Figure 4.
In case temperature increase, actuator (T) starts to lift its piston. This lift force starts to move the sleeve valve (2) downward and this causes port opening both inside (where the inner surface of sleeve valve (2) and sealing element of valve seat (3) are in contact.) and outside (where a seat construction of valve seat (3) and top end point of sleeve valve (2) are in contact.). Opening double port simultaneously provides a pressure balanced feature as well as low pressure drops with high flow rates. In case radiator outlet (R) is closed, the end point of sleeve valve (2) is seated by valve seat' s (3) seat structure. There is coolant pressure on both sides so that leakage is obstructed on the other hand second sealing element (32) provides leak tightness for inner side yet there is no sealing precaution for outer side.
The main body (D) has radiator outlet (R), inlet (G) and bypass outlet (B).
In another embodiment of the invention, thermostat assembly with double flow enabled pressure balanced sleeve valve structure (1) is an assembly of valve seat (3) and sleeve valve (2) by a binding or fastening method.
The main body (D) provides housing for thermostat assembly with double flow enabled pressure balanced sleeve valve structure (1) and produced by preferably a plastic material. Bottom surface of main body (D) is configured accordingly where the thermostat assembly with double flow enabled pressure balanced sleeve valve structure (1) is mounted besides there is an inlet (I) on the bottom surface.
There is at least one, preferably two bypass outlet window (W) on the side surface, allowing the coolant flow through bypass outlet (B) when bypass outlet (B) is open. Bypass outlet (B) is shaped as a hose preferably produced by plastic and assembled to the main body (D) preferably by welding on bypass outlet window's (W) side. The end point of bypass outlet (B) is suitably shaped so as to allow hose connection. The radiator outlet (R) is positioned on the end point of main body (D) and also has hose geometry protruded from main body (D). The end point of radiator outlet (R) is also has suitable shape allowing connection.
There is a guiding protrusion of main body (P) inside of a space inside of the main body (2) which is protruded through inner side from top side of inner side of main body (D). The guiding protrusion of main body (P) provides correct installation of double action pressure balanced sleeve valve structure (1) by intertwining the inner part of valve seat (3). There is a hole on the bottom surface of guiding protrusion of main body (P) which' s diameter is slightly greater than the diameter of the pin of actuator (T) so as to guide actuator (T).
The double flow enabled pressure balanced sleeve valve structure (1) is obtained by assembling valve seat (3) and sleeve valve (2). Second sealing element (32) is assembled around valve seat (3) which is produced by an elastomer compound. First sealing element (214) is also assembled around the sleeve valve (2) which is also produced by an elastomer compound. Sleeve valve (2) is embodied by assembly of upper body (21) and lower body (22). This assembly has a space inside wherein the inner part of valve seat (3) and actuator (T) is placed.
There is no additional fastening or fastener needed to assembly to engage valve seat (3) and sleeve valve (2) so that an easily applicable and cost effective solution is implemented.
The outer part of valve seat (3) is shaped inside of the main body (D), wherein the sleeve valve (2) and main body (D) are in contact when the radiator output (R) is closed which called inclined region (4). Valve seat (3) has an inner part which is assembled inside of sleeve valve (32) and which provides a seat for sleeve valve (2) from inner surface. There are at least six pressure balancing channels (31) which are shaped to help providing uniform flow.
Sleeve valve (2) upper body (21) has at least a curtain type bypass valve (211) protruded from the outer side of upper body (21) so as to control the flow through bypass outlet (B), at least three and preferably four inner guiding protrusions (212) protruded from the inner side of upper body (21) which provide a guide for valve seat (3) and flow channels and at least an outer guiding protrusion (213) which provides correct assembly of sleeve valve (2) and valve seat (3) inside of the main body (D).
Sleeve valve (2) lower body (22), has at least four pressure balancing windows (221) which are hollows on the bottom surface allowing the flow inlet, at least a actuator guide hole (222) which is a hollow on the bottom surface has diameter slightly greater than the diameter of a rod part of actuator (T). Pressure balancing window (221) provides controlling a parallel flow according to a motion axis of sleeve valve (2).
Upper body (21) and lower body (22) are produced by preferably plastic material and preferably assembled each other by welding. Inner part of double contact faced valve seat (3) and actuator (T) are placed inside of sleeve valve (2) then sleeve valve upper body (21) and lower body (22) are welded. So that double flow enabled pressure balanced sleeve valve structure (1) is obtained. This assembly placed into main body (D) as so the guiding protrusion of main body (P) pass through the hollow of inner part of double contact faced valve seat (3). There is a hole on the bottom of the guiding protrusion of main body (P) which' s inner diameter is slightly greater than the outer diameter of the pin of actuator (T). The pin of actuator (T) is guided by this hole. After then, spring (S) is placed so as encircling the rod of actuator (T) and locked by spring retainer (G).
Sleeve valve (2) comprises upper body (21) and lower body (22) and controls the flow through both radiator outlet (R) and bypass outlet (B). By downward movement of sleeve valve (2), both the port between main body (D) and outer side of sleeve valve (2) and the port between double contact faced valve seat (3) and inner side of sleeve valve (2) is opened simultaneously. Thus, low pressure drop with high flow rate is provided. Valve seat (3) which controls the flow through the radiator outlet (R) is assembled inside of the sleeve valve (2). Valve seat (3) has a separate inner part of valve seat (3) which is a hollowed cylinder protruded above and which' s inner diameter is greater than the guiding protrusion of main body (P) and which' s outer diameter is small enough to allow intertwine with sleeve valve (2). Inner part of valve seat (3) has preferably six pressure balancing channels (31) which provide uniform flow. A second sealing element (2) is assembled so as to provide sealing.
In one embodiment, an outer part of valve seat (3) is shaped on the inside of main body (D) and an inner part of valve seat (3) is assembled inside of the sleeve valve (2).
A curtain type bypass valve (211) is protruded from the outer side of the sleeve valve (2) upper body (21) which controls the flow through bypass outlet (B). While the force of actuator causing port opening through radiator outlet (R), by pass outlet is being closed by bypass valve (211) simultaneously.

Claims

Thermostat assembly with double flow enabled pressure balanced sleeve valve structure (1) for cooling circulation units of internal combustion engines to decrease pressure drops with an additional flow through a valve and to decrease the required force for opening the valve, comprises at least an inlet (I), a radiator outlet (R), a bypass outlet (B), a main body (D), an actuator (T), a spring (S), a spring retainer (G) and characterized by;
• At least one sleeve valve (2) comprises upper body (21) and lower body (22),
• At least one valve seat (3) which is installed inside the sleeve valve (2), provides a first contact face with the sleeve valve (2) from inside of it and controls the inner flow,
• At least one inclined region (4) of main body (D) which provides a second contact face with the sleeve valve (2) from outside of it by constricting and which controls the outer flow.
• At least one upper body (21) consist of bypass valve (211), inner guiding protrusion (212), outer guiding protrusion (213) and first sealing element (214),
• At least one bypass valve (211), which is protruded from an outer side of upper body (21) to control the flow through bypass outlet (B),
• At least three inner guiding protrusion (212) which is protruded from an inner side of upper body (21) to guide for valve seat (3).
• At least one outer guiding protrusion (213) which provides correct assembly of sleeve valve (2) and valve seat (3) inside of the main body (D),
• At least one first sealing element (214) for sealing the outer flow, • At least one lower body (22) consist of pressure balancing hole (221) and actuator guide hole (222),
• At least one pressure balancing window (221) which is form of a hollow to allow the flow inlet and to balance pressure of the flow,
• At least one actuator guide hole (222) to provide guiding of the actuator (T),
• At least one pressure balancing channel (31) which provide a passage on outer diameter of inner part of valve seat (3) for allowing a coolant passage while a guiding motion of sleeve valve (2) and providing a uniform flow.
• At least one second sealing element (32) for sealing the inner flow.
Thermostat assembly with double flow enabled pressure balanced sleeve valve structure (1) for cooling circulation units of internal combustion engines to decrease pressure drops with an additional flow through a valve and to decrease the required force for opening the valve, comprises at least an inlet (I), a radiator outlet (R), a bypass outlet (B), a main body (D), an actuator (T), a spring (S), a spring retainer (G) and characterized by;
• At least one sleeve valve (2) which helps controlling the flow through radiator outlet (R),
• At least one valve seat (3) which is installed inside the sleeve valve (2), provides double contact face with the sleeve valve (2) from inside and outside of it and controls the inner flow in addition to the outer flow through the radiator outlet (R),
• At least one pressure balancing window (221) providing an inlet through inside,
• At least one actuator guide hole (222) to provide guiding of the actuator (T),
• At least one second sealing element (32) for sealing the inner flow, A thermostat assembly with double flow enabled pressure balanced sleeve valve structure (1) according to claim 1 or 2, characterized by a sleeve valve (2) which allows controlling both the outer flow and inner flow through radiator outlet (R) by opening an outer port and an inner port.
A thermostat assembly with double flow enabled pressure balanced sleeve valve structure (1) according to claim 1 or 2, characterized by pressure balancing window (221), which provides controlling a parallel flow according to a motion axis of sleeve valve (2).
A thermostat assembly with double flow enabled pressure balanced sleeve valve structure (1) according to claim 1 or 2, characterized by four pressure balancing windows (221),
A Thermostat assembly with double flow enabled pressure balanced sleeve valve structure (1) according to claim 1, characterized by an inner part of valve seat (3) which has a hollowed cylindrical geometry so as to be assembled by engaging the guiding protrusion of main body (P), which is a part of valve seat (3).
A thermostat assembly with double flow enabled pressure balanced sleeve valve structure (1) according to claim 1, characterized by upper body (21) and lower body (22) which have a space inside wherein actuator (T) and valve seat (3) are placed.
A thermostat assembly with double flow enabled pressure balanced sleeve valve structure (1) according to claim 1 or 2, characterized by actuator guide hole (222) which is a hollow on the bottom surface has diameter slightly greater than the diameter of a rod part of actuator (T). A thermostat assembly with double flow enabled pressure balanced sleeve valve structure (1) according to claim 1, characterized by pressure balancing channel (31) which provide a passage on outer diameter of inner part of valve seat (3) for allowing a coolant passage while guiding motion of sleeve valve (2) and providing a uniform flow.
10. A thermostat assembly with double flow enabled pressure balanced sleeve valve structure (1) according to claim 1, characterized by sleeve valve (2) and valve seat (3) which allow outer flow as well as inside flow by opening double ports both inner side and outer side so as to achieve lower pressure drops with increasing flow rates.
11. A thermostat assembly with double flow enabled pressure balanced sleeve valve structure (1) according to claim 1, characterized by sleeve valve (2) which comprises upper body (21) and lower body (22) assembled to each other by welding.
12. A thermostat assembly with double flow enabled pressure balanced sleeve valve structure (1) according to claim 1 or 2, characterized by sleeve valve (2) which controls flow through the radiator outlet (R) by opening a port between radiator outlet (R) and sleeve valve (2) both inner and outer.
13. A thermostat assembly with double flow enabled pressure balanced sleeve valve structure (1) according to claim 1, characterized by valve seat (3) whose an outer part is shaped on the inside of main body (D) and whose an inner part is assembled inside of the sleeve valve (2).
14. A Thermostat assembly with double flow enabled pressure balanced sleeve valve structure (1) according to claim 1 or 2, characterized by valve seat (3) which has six pressure balancing channels (31) which provides flow channels.
15. A Thermostat assembly with double flow enabled pressure balanced sleeve valve structure (1) according to claim 1, characterized by four inner guiding protrusions (212).
16. A Thermostat assembly with double flow enabled pressure balanced sleeve valve structure (1) according to claim 1, characterized by first sealing element (214) and second sealing element (32) are produced by an elastomer compound.
17. A Thermostat assembly with double flow enabled pressure balanced sleeve valve structure (1) according to claim 1 or 2, characterized by bypass valve (211) which is a form of curtain type valve.
EP18832296.0A 2017-04-14 2018-03-06 A thermostat assembly with double flow enabled pressure balanced sleeve valve structure Withdrawn EP3610143A4 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR201705591 2017-04-14
PCT/TR2018/050080 WO2019013730A2 (en) 2017-04-14 2018-03-06 A thermostat assembly with double flow enabled pressure balanced sleeve valve structure

Publications (2)

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EP3610143A2 true EP3610143A2 (en) 2020-02-19
EP3610143A4 EP3610143A4 (en) 2020-10-14

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EP18832296.0A Withdrawn EP3610143A4 (en) 2017-04-14 2018-03-06 A thermostat assembly with double flow enabled pressure balanced sleeve valve structure

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WO (1) WO2019013730A2 (en)

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* Cited by examiner, † Cited by third party
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JPS60256692A (en) * 1984-05-31 1985-12-18 Fuji Thomson Kk Series composite heat responding valve
US5038724A (en) * 1990-04-16 1991-08-13 Outboard Marine Corporation Debris resistant valve assembly
US5381953A (en) * 1993-02-23 1995-01-17 Fishman; Joseph Fail-open locking element and thermostat incorporating same
DE102005018904B3 (en) * 2005-04-18 2007-01-25 Itw Automotive Products Gmbh & Co. Kg Thermostatic valve for the cooling system of an internal combustion engine
FR2906334B1 (en) * 2006-09-25 2011-04-15 Mark Iv Systemes Moteurs Sa SLIDING BOOM VALVE UNIT AND CIRCUIT COMPRISING SUCH VALVE
US20120118987A1 (en) * 2010-11-11 2012-05-17 Fishman Thermo Technologies Ltd. Thermostat assembly
JP5936868B2 (en) * 2012-01-31 2016-06-22 日本サーモスタット株式会社 Thermostat device
IL233943B (en) * 2014-08-04 2020-06-30 Israel Aerospace Ind Ltd Two-stage valve
CN204140181U (en) * 2014-08-06 2015-02-04 武汉美嘉机械塑料有限公司 A kind of waxtype thermostat

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CN110651105A (en) 2020-01-03
WO2019013730A3 (en) 2019-04-25
EP3610143A4 (en) 2020-10-14
WO2019013730A2 (en) 2019-01-17

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