WO2017034456A1 - Dispositif thermostatique - Google Patents

Dispositif thermostatique Download PDF

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Publication number
WO2017034456A1
WO2017034456A1 PCT/SE2016/050779 SE2016050779W WO2017034456A1 WO 2017034456 A1 WO2017034456 A1 WO 2017034456A1 SE 2016050779 W SE2016050779 W SE 2016050779W WO 2017034456 A1 WO2017034456 A1 WO 2017034456A1
Authority
WO
WIPO (PCT)
Prior art keywords
coolant
housing
valve body
thermostat
line
Prior art date
Application number
PCT/SE2016/050779
Other languages
English (en)
Inventor
Jimmy Larsson
Original Assignee
Scania Cv Ab
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 Scania Cv Ab filed Critical Scania Cv Ab
Publication of WO2017034456A1 publication Critical patent/WO2017034456A1/fr

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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
    • 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
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
    • F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
    • F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
    • 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
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
    • F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
    • F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
    • F16K11/07—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides
    • F16K11/0716—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides with fluid passages through the valve member
    • 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
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
    • F16K11/08—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only taps or cocks
    • F16K11/085—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only taps or cocks with cylindrical plug
    • 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
    • F01P2007/143—Controlling of coolant flow the coolant being liquid using restrictions
    • 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
    • F01P2007/146—Controlling of coolant flow the coolant being liquid using valves

Definitions

  • the present invention relates to a thermostat device according to the preamble of claim 1.
  • a cooling system provides a cooling efficiency of a combustion engine which is related to the temperature of the coolant and the flow of the coolant through the combustion engine.
  • the temperature of the coolant in the cooling system is regulated by a thermostat.
  • the thermostat directs the coolant, via a bypass line, to the combustion engine without cooling in a radiator.
  • the thermostat directs the coolant to the radiator for cooling before it is enters the combustion engine.
  • the radiator is usually arranged at a front portion of a vehicle where the coolant is cooled by ambient air forced through the radiator by ram air and a radiator fan.
  • the coolant flow through the cooling system is provided by a coolant pump.
  • the coolant pump is usually mechanically driven by the combustion engine. Consequently, the pump provides a coolant flow, which is related to the speed of the combustion engine.
  • the speed of a combustion engine is not always an optimal parameter for controlling the coolant flow through the cooling system.
  • the coolant pump provides a too high coolant flow in the cooling system the combustion engine will be cooled to a too low temperature.
  • the coolant pump is driven with an unnecessarily high power supply from the combustion engine, which increases, to the fuel consumption of the combustion engine. It is known to use different kind of coolant pumps, which provides a controllable coolant flow. However, such pumps are relatively complicated and expensive.
  • GB 2 377 253 shows a cooling system including a thermostat, a coolant pump and a flow restriction valve arranged in a position downstream of the pump.
  • the flow restriction valve is operated to restrict the output of the pump by a vacuum controlled actuator acting on signals from a control module.
  • the temperature of the coolant is controlled by the thermostat.
  • the flow of the coolant is controlled by the coolant pump and the flow restriction valve.
  • a number of relatively expensive components are used to control the temperature and the flow of the coolant in a cooling system.
  • the object of the present invention is to control the temperature of the coolant and the flow of the coolant in a cooling system and thus the cooling efficiency of a component cooled by the coolant in a simple and reliable manner.
  • the thermostatic device comprises a thermostat including a housing and a valve body movably arranged inside the housing.
  • the valve body is movably arranged to at least two bypass positions in which it allows a coolant flow through the bypass line. In these cases, the valve body prevents a coolant flow through the radiator line and the radiator.
  • the valve body is also movably arranged to at least two radiator positions in which it allows a coolant flow through radiator line and the radiator. In this case, the valve body blocks the coolant flow through the bypass line.
  • the valve body directs the coolant through the bypass line and past the radiator.
  • the valve body When the coolant has a higher temperature than the regulating temperature of the thermostat, the valve body directs the coolant through the radiator line and the radiator. Consequently, the thermostat has a corresponding function as a conventional thermostat.
  • the valve body is positionable in at least two bypass positions and in at least two radiator positions in which flow passages of different sizes are formed through the thermostat.
  • Such a thermostat makes it is possible to vary the flow area through the thermostat and the coolant flow through the cooling system when the coolant flows through the bypass line as well as the coolant flows through the radiator line. In this case, it is possible to regulate the temperature of the coolant and the coolant flow through the cooling system by means of a one and the same component in a simple and reliable manner.
  • the thermostat comprises bypass passages having a flow area varying between a maximum flow area and a minimum flow area in a stepless manner.
  • the thermostat comprises radiator passages having a flow area varying between a maximum flow area and a minimum flow area in a stepless manner.
  • the coolant flow through the cooling system in a stepless manner when the valve body directs coolant through the radiator line and the radiator.
  • the thermostat is configured to receive coolant from a component outlet line and to direct the coolant to the bypass line or a radiator inlet line.
  • the thermostat receive the coolant when it has cooled the component in the cooling system.
  • the component may be a compression engine.
  • the thermostat directs the coolant to the bypass line or the radiator inlet line in response to the coolant temperature.
  • the thermostat is configured to receive coolant from the bypass line or a radiator outlet line and to direct the coolant to a component inlet line.
  • the thermostat is arranged to receive coolant from the bypass line or the radiator outlet line in response to the coolant temperature.
  • the housing comprises a first opening connected to the component line, a second opening connected to the bypass line and a third opening connected to the radiator line and thai
  • the valve body comprises a first hole configured to form a first flow passage of a constant size together with the first opening of the housing and a second hole configured to form a flow passage of a variable size together with the second opening of the housing or the third opening of the housing.
  • the housing may have a cylindrical shape and the valve body a corresponding cylindrical shape on the inside the housing.
  • coolant may- flow to an inner space of the thermostat via an inlet defined by an opening in the housing and a hole in the valve body and out from the thermostat via an outlet defined by opening in the housing and a hole in the valve body.
  • the valve body is movably arranged inside the housing between at least two positions in which the second hole of the valve body and the second opening of the housing overlap each other in a variable manner.
  • the valve body may be movably arranged inside the housing between at least two positions in which the second hole of the valve body and the third opening of the housing overlap each other in a variable manner. In this case, it is possible to adjust the size of an outlet of a flow passage through the thermostat directing coolant to the radiator inlet line. Alternatively, it is possible to adjust the size of an inlet of a flow passage through the thermostat receiving coolant from the radiator outlet line.
  • the valve body is configured to be rotated to different positions inside the housing.
  • the valve body is configured to be displaced, via a straight line movement, to different positions inside the housing. It is relatively easy to provide such movements of the valve body on the inside of the housing. However, it is also possible to provide other kinds of movements or combinations of movements of the valve body in relation to the housing.
  • the thermostat device comprises an actuator configured to provide the movement of the valve body to different positions inside the housing.
  • an actuator may be a pneumatic cylinder, a hydraulic cylinder or an electric motor.
  • the thermostat device may comprise a control unit configured to control the actuator.
  • the control unit may be a computer unit or the like having access to stored information of suitable positions of the valve body during different driving condition of the vehicle.
  • the control unit is configured to control the actuator by means of information from a temperature sensor sensing the temperature of the coolant.
  • the temperature sensor may be arranged in the component outlet line where the coolant usually has its highest temperature. It is of course possible to arrange the temperature sensor in other parts of the cooling system. It is also possible to use several temperature sensors sensing the temperature of the coolant in different parts of the cooling system.
  • the control unit may also be able to control the thermostat with information about the temperature change of the coolant with time and how quickly the temperature of the coolant is changed.
  • the control unit is configured to control the actuator by means of information about at least a further operating parameter of the vehicle.
  • the cooling efficiency of the coolant in the radiator is related to the size of the air flow through the radiator and the temperature of the air flow. A low air temperature results in a greater cooling efficiency of the coolant than a high air temperature. As a consequence, it is possible to rise the regul ating temperature of the thermostat when ambient air has a low temperature.
  • Another such further parameter may be the weight of the vehicle.
  • the weight of a vehicle such as a truck may vary considerably between an empty load condition and a full load condition. In the empty load condition, the combustion engine requires a less efficient cooling of the cooling system than in the full load condition.
  • the control device may also receive information from a GPS unit or the like having access to information about the topography of the road ahead. In this case, it is possible for the control unit to lower the regulating temperature of the thermostat when it is a long uphill road ahead.
  • Fig. 1 shows a cooling system cooling a combustion engine in a vehicle
  • Fig. 2 shows the thermostat device in Fig. I more in detail
  • Fig. 3a-d shows a cross section view along a plane A- A through the thermostat device when it is in different positions
  • Fig 4a-b shows an alternative embodiment of the thermostat device.
  • Fig. 1 shows schematically a vehicle I powered by a combustion engine 2.
  • the vehicle 1 may be a heavy vehicle and the combustion engine 2 may be a diesel engine or an Otto engine.
  • the combustion engine 2 is cooled by a coolant circulating in a cooling system.
  • the cooling system comprises an engine inlet line 3 delivering coolant to the combustion engine 2.
  • the engine inlet line 3 comprises a coolant pump 4 circulating the coolant in the cooling system.
  • the engine outlet line 5 comprises a retarder cooler 6 for cooling of hydraulic oil in a hydrodynamic retarder. After the coolant has passed through the retarder cooler 6, it is delivered to a thermostat 7.
  • the thermostat 7 is regulated by an actuator 8 which is controlled by a control unit 9.
  • the control unit 9 receives information from a temperature sensor 10 about the temperature of the coolant in a suitable position of the cooling system, in this case, the temperature sensor 10 senses the temperature of the coolant in the engine outlet line 5 in a downstream position of the retarder cooler 6.
  • the control unit 9 may receive information from several temperature sensors arranged in other positions of the cooling system.
  • the control unit 9 may also receive information about further operation parameters 11, which influence on the required cooling efficiency of the combustion engine 2.
  • the further parameters may be the ambient temperature, the loading condition and thus the weight of the vehicle, GPS information of the topography of the road ahead etc. In view of this information, the control unit 9 estimates a suitable regulating temperature of the thermostat 7.
  • the control unit 9 controls the actuator such it sets the thermostat 7 in a bypass position in which it directs the coolant flow from the engine outlet line 5 to a bypass line 12 and to the inlet line 3 to combustion engine 2 without cooling.
  • the control unit 9 controls the actuator 8 such that it sets the thermostat 7 in a radiator position in which it directs the coolant flow from the engine outlet line 5 to a radiator inlet line 13.
  • the radiator inlet line 13 delivers the coolant to a radiator 14 arranged at a front portion of the vehicle 1.
  • the coolant is cooled in the radiator 14 by air forced through the radiator 14 by ram air and a radiator fan 15.
  • the radiator fan 15 is powered by the combustion engine 2 by means of a suitable mechanical mechanism.
  • the coolant leaving the radiator 14 is delivered, via a radiator outlet line 16, to the engine inlet line 3 and the coolant pump 4.
  • Fig. 2 shows the thermostat 7 more in detail.
  • the thermostat 7 comprises a cylinder- shaped stationary housing 17 enclosing a cylindrically shaped valve body 18 arranged inside the housing 17.
  • the housing 17 comprises at a lower end wall an inlet opening 17a for receiving of coolant from the engine outlet line 5.
  • An actuator in the form of an electric motor 8 is arranged at an upper end wall of the housing 17.
  • the housing 17 comprises a first outlet opening 17b through which coolant is directed to the bypass line 12 and a second outlet opening 17c through which coolant is directed to the radiator inlet line 13.
  • the electric motor 19 is configured to rotate the valve body 18 inside the housing 17 around a rotary axis 20.
  • Fig. 3a-d show a cross section view of the thermostat 7 in a plane A -A.
  • the valve body 18 is cylindrical ⁇ shaped and arranged inside the housing 17.
  • the valve body 18 has an outer wall surface located substantially immediately internally of an inner wall surface of the housing 17.
  • the valve body 18 comprises, at a lower end wall, an inlet hole 18a for receiving of coolant from the from the engine outlet line 5.
  • the inlet hole 18a of the valve body 18 and the inlet opening 17a of the housing 17 are coaxially arranged about the rotary axis 20.
  • the inlet opening 17a in the housing 17 and the inlet hole 18a in the valve body 18 form an inlet of a constant size independent of the rotary position of the valve body 18.
  • the valve body 18 is at an upper end wall connected to the electric motor 19, via a driving shaft 21, extending through the upper end wall of the housing 17. A rotary movement of the electric motor 19 is transmitted via the driving shaft to a corresponding rotary movement of the valve body 18.
  • the valve body 18 comprises an outlet hole 18b in a periphery wall.
  • Fig 3a shows the valve body 18 in a bypass position, hi this position, the valve body 18 covers the second outlet opening 17c of the housing 17.
  • the outlet hole 18b of the valve body 18 has a corresponding position as the first outlet opening 17b of the housing 17.
  • the outlet hole 18b of the valve body 18 and the first outlet opening 17b of the housing 17 overlap each other completely.
  • the outlet hole 18b of the valve body 18 and the first outlet opening 17b of the housing 17 form an outlet to the bypass line 12 of a maximum size.
  • the coolant from the engine outlet line 5 enters an inner space of the valve body 18 via the inlet formed by the inlet opening 17a of the housing 17 and the inlet hole 18a of the valve body 18 whereupon the coolant leaves the housing 17 and enters the bypass line 12 via the outlet formed by the outlet hole 18b of the valve body 18 and the first outlet opening 17b of the housing 17. Since said inlet and said outlet has a relatively large size, the pressure drop of the coolant is substantially negligible when it flows through the thermostat 7.
  • Fig 3b shows the valve body 18 in an alternative bypass position. Also in this position, the valve body 18 covers the second outlet opening 17c of the housing 17.
  • valve body 18 has been rotated to a position in which the outlet hole 18b of the valve body 18 has a somewhat displaced position in response to the first outlet opening 17b of the housing 17.
  • the valve body 18 has been rotated to a position in which the outlet hole 18b of the valve body 18 has a somewhat displaced position in response to the first outlet opening 17b of the housing 17.
  • the outlet hole 18b of the valve body 18 and the first outlet opening 17b of the housing 17 form an outlet to the bypass line 12 of a reduced size.
  • the outlet may be reduced to a desired size in a stepless manner by rotating the valve body 18 to different bypass positions. Since said outlet has a reduced size, the pressure drop of the coolant is not negligible. The value of the pressure drop is related to the size of the outlet. The pressure drop of the coolant results in a reduced coolant flow to the bypass line 12 and a reduced coolant flow in the coolant system.
  • Fig 3c shows the valve body 18 in a radiator position.
  • the valve body 18 covers the first outlet opening 17b of the housing 17.
  • the outlet hole 18b of the valve body 18 has a corresponding position as the second outlet opening 17c of the housing 17.
  • the outlet hole 18b of the valve body 18 and the second outlet opening 17c of the housing 17 overlap each other completely.
  • the outlet hole 18b of the valve body 18 and the second outlet opening 17c of the housing 17 form an outlet to the radiator inlet line 13 of a maximum size.
  • the coolant has a substantially negligible pressure drop when it flows through the thermostat 7.
  • Fig 3d shows the valve body 18 in an alternative radiator position. Also in this position, the valve body 18 covers the first outlet opening 17b of the housing 17. In this case, the valve body 18 has been rotated to a position in which the outlet hole 18b of the valve body 18 has a somewhat displaced position in response to the second outlet opening 17c of the housing 17. Thus, only a part of the outlet hole 18b of the valve body 18 and the first outlet opening 17c of the housing 17 overlap each other. As a consequence, the outlet hole 18b of the valve body 18 and the second outlet opening 17c of the housing 17 form an outlet to the radiator inlet line 13 of a reduced size.
  • the outlet passage to the radiator inlet line 13 may be reduced to a desired size in a stepless manner by rotating the valve body 18 to different radiator positions.
  • the control unit 9 receives substantially continuously information from the temperature sensor 10 about the temperature of the coolant in the cooling system and information 11 about relevant parameters, which may be the load of the combustion engine, the loading condition of the vehicle, ambient air
  • the control unit 9 controls the electric motor 8 such that it rotates the valve body 18 to a suitable bypass position in which the coolant is directed to the bypass line 12. Consequently, the coolant is successively heated by the combustion engine. Furthermore, the control unit 9 is able to control the size of the outlet of the thermostat 7 and thus the coolant flow to the bypass line 12 and the valve body 18 in the coolant system.
  • a suitable adjustment of the coolant flow in the cooling system it is possible to accomplish a fast constant heating process of the coolant and the combustion engine 2 after a cold start.
  • a reduced coolant flow in the cooling system results in a reduced power supply to the coolant pump 4 from the combustion engine 2 and a reduced fuel consumption.
  • the control unit 9 When the control unit 9 receives information from the temperature sensor 10 indicating that the coolant temperature has become higher than the regulating temperature of the thermostat 7, it activates the electric motor 19 such it rotates the valve body 18 to a suitable radiator position. Consequently, the thermostat 7 directs the coolant flow to the radiator 14 where it is cold. Furthermore, the control unit 9 is able to control the size of the outlet to the radiator inlet line 13 and thus the coolant flow in the cooling system in a manner to maintain a substantially optimal temperature of the coolant and the combustion engine 2 during varying driving condition.
  • Fig. 4a-b shows an alternative embodiment of the thermostat 7. In this case, the thermostat 7 is arranged in a position of the cooling system indicated with dotted lines in Fig. 1.
  • the thermostat 7 comprises a cylinder- shaped housing 22 enclosing a displaceable valve body 23.
  • the housing 22 comprises an outlet opening 22a at a side wall.
  • the housing 22 comprises a first inlet opening 22b for receiving of coolant from the bypass line 12and a second inlet opening 22c for receiving of coolant from the radiator outlet line 16 at a periphery wall.
  • the valve body 23 comprises an outlet hole 23a to be in constant connection to the outlet opening 22a of the housing 22.
  • the valve body 23 comprises an inlet hole 23b to be connected to the first inlet opening 22b or the second inlet opening 22c of the housing 22.
  • An actuator in the form of a power cylinder 24 is arranged at a side end wall of the housing 22.
  • the power cylinder 24 may be a pneumatic cylinder or a hydraulic cylinder.
  • the power cylinder 24 is arranged to displace the valve body 23 in a longitudinal direction inside the cylinder- shaped housing 22.
  • the activation of the power cylinder 24 is controlled by the control unit 9.
  • Fig 4a shows the valve body 23 in a fully open bypass position.
  • the valve body 23 covers the second inlet opening 22c of the housing 22.
  • the inlet hole 23b of the valve body 23 has a corresponding position as the first inlet opening 22b of the housing 22.
  • the inlet hole 23b of the valve body 23 and the first outlet opening 22b of the housing 17 overlap each other completely.
  • the inlet hole 23b of the valve body 23 and the first inlet opening 22b of the housing 22 form an inlet of a maximum size for coolant entering an inner space of the valve body 23 from the bypass line 12.
  • the outlet hole 23a of the valve body and the outlet opening 22a of the housing 22 form an outlet passage from the inner space of the valve body 23 to the engine inlet line 3.
  • the coolant has a
  • the power cylinder displaces the valve body 23 a smaller distance from the position shown in Fig. 4, the inlet hole 23b of the valve body 23 will be displaced in relation to the first inlet opening 22b of the housing 22.
  • the valve body 23 may be displaced to a position in which a part of the inlet opening 23b of the valve body 23 and the first inlet opening 22b of the housing 22 overlap each other.
  • the inlet hole 23b of the valve body 23 and the first inlet opening 22b of the housing 22 form an inlet to the inner space of the valve body 23 of a reduced size.
  • the inlet may be reduced to a desired size in a stepless manner by displacement of the valve body 23 to different partially open bypass positions.
  • Fig 4b shows the valve body 23 in a fully open radiator position.
  • a side wall of the valve body 23 prevents communication between the first inlet opening 22a of the housing 22 and the engine inlet line 3.
  • the inlet hole 23b of the valve body 23 has a corresponding position as the second inlet opening 22c of the housing 22.
  • the inlet hole 23b of the valve body 23 and the second inlet opening 22c of the housing 22 overlap each other completely.
  • the inlet hole 23b of the valve body 23 and the second inlet opening 22c of the housing 22 form an inlet of a maximum size for coolant from the radiator outlet line 16 to an inner space of the valve body 23.
  • the outlet hole 23 a of the valve body 23 and an outlet opening 22a of the housing 22 form an outlet from the inner space of the valve body to the engine inlet line 3.
  • the coolant has a substantially negligible pressure drop when it flows from the radiator outlet line 16, via the thermostat 7, to the engine inlet line 3.
  • the power cylinder displaces the valve body 23 a smaller distance from the position shown in Fig. 4b, the inlet hole 23b of the valve body 23 will be displaced in relation to the second inlet opening 22c of the housing 22.
  • the valve body 23 may be displaced to a position in which the inlet opening 23b of the valve body 23 and the second inlet opening 22c of the housing 22 overlap each other partly.
  • the inlet hole 23b of the val ve body 23 and the second inlet opening 22c of the housing 22 form an inlet passage to the inner space of the valve body 23 of a reduced size.
  • the inlet passage may be reduced to a desired size in a stepless manner.
  • the valve body 23 is in a partially open radiator position.
  • the invention is not restricted to the described embodiment but may be varied freely within the scope of the claims.
  • the thermostat shown in Fig 3a-d can, for example, be modified and placed in the position shown with dotted lines in Fig. 1.
  • the thermostat shown in Fig 4a-b can be modified and placed in the position shown with solid lines in Fig. 1.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Temperature-Responsive Valves (AREA)

Abstract

La présente invention concerne un dispositif thermostatique pour un système de refroidissement dans un véhicule. Le système de refroidissement comprend une ligne (3, 5) de composant distribuant un liquide de refroidissement vers un composant (2) à refroidir, ou en provenance de celui-ci, une ligne (13, 16) de radiateur distribuant le liquide de refroidissement vers un radiateur (14), ou en provenance de celui-ci, et une ligne de dérivation (12) distribuant le liquide de refroidissement au-delà du radiateur (14). Le dispositif thermostatique comprend un thermostat (7) comprenant un boîtier (17, 22) et un corps (18, 23) de soupape agencé mobile à l'intérieur du boîtier (17, 22) entre une position de dérivation dans laquelle un passage d'écoulement est formé à travers le thermostat (7) entre la ligne (3, 5) de composant et la ligne de dérivation (12) et une position de radiateur dans laquelle un passage d'écoulement est formé à travers le thermostat (7) entre la ligne (3, 5) de composant et la ligne (13, 16) de radiateur. Le corps (18, 23) de soupape peut être positionné dans au moins deux positions de dérivation dans lesquelles des passages de dérivation de différentes tailles sont formés à travers le thermostat (7) et dans au moins deux positions de radiateur dans lesquelles des passages de radiateur de différentes tailles sont formés à travers le thermostat (7).
PCT/SE2016/050779 2015-08-25 2016-08-22 Dispositif thermostatique WO2017034456A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE1551095A SE1551095A1 (en) 2015-08-25 2015-08-25 Thermostat device
SE1551095-1 2015-08-25

Publications (1)

Publication Number Publication Date
WO2017034456A1 true WO2017034456A1 (fr) 2017-03-02

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE1850110A1 (en) * 2018-01-31 2019-08-01 Scania Cv Ab A thermostat arrangement for a cooling system for a combustion engine
US20220145794A1 (en) * 2019-03-05 2022-05-12 Bayerische Motoren Werke Aktiengesellschaft Coolant Circuit in a Vehicle
EP4202270A1 (fr) * 2021-12-22 2023-06-28 Esbe Ab Ensemble soupape multiport

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DE4117532A1 (de) * 1991-05-29 1992-12-03 Ingelheim Peter Graf Von Selbstregelndes kuehlsystem fuer waermekraftmaschinen, insbesondere verbrennungsmotoren mit weitem drehzahlbereich
US6164248A (en) * 1998-03-04 2000-12-26 Daimlerchrysler Ag Control device for the coolant and heating circulation circuit of an internal combustion engine
EP1108867A2 (fr) * 1999-12-17 2001-06-20 Robert Bosch Gmbh Soupape à trois voies
DE102009009854A1 (de) * 2009-02-20 2010-09-02 Audi Ag Kühlmittelkreislauf für eine Brennkraftmaschine
DE102013216267A1 (de) * 2013-08-16 2015-02-19 Ford Global Technologies, Llc Proportionalventil und Verfahren zur Steuerung eines derartigen Proportionalventils

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4117532A1 (de) * 1991-05-29 1992-12-03 Ingelheim Peter Graf Von Selbstregelndes kuehlsystem fuer waermekraftmaschinen, insbesondere verbrennungsmotoren mit weitem drehzahlbereich
US6164248A (en) * 1998-03-04 2000-12-26 Daimlerchrysler Ag Control device for the coolant and heating circulation circuit of an internal combustion engine
EP1108867A2 (fr) * 1999-12-17 2001-06-20 Robert Bosch Gmbh Soupape à trois voies
DE102009009854A1 (de) * 2009-02-20 2010-09-02 Audi Ag Kühlmittelkreislauf für eine Brennkraftmaschine
DE102013216267A1 (de) * 2013-08-16 2015-02-19 Ford Global Technologies, Llc Proportionalventil und Verfahren zur Steuerung eines derartigen Proportionalventils

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE1850110A1 (en) * 2018-01-31 2019-08-01 Scania Cv Ab A thermostat arrangement for a cooling system for a combustion engine
US20220145794A1 (en) * 2019-03-05 2022-05-12 Bayerische Motoren Werke Aktiengesellschaft Coolant Circuit in a Vehicle
EP4202270A1 (fr) * 2021-12-22 2023-06-28 Esbe Ab Ensemble soupape multiport

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