EP2959126A1

EP2959126A1 - Thermostat valve

Info

Publication number: EP2959126A1
Application number: EP14705354.0A
Authority: EP
Inventors: Hans-Peter Klein; Eike Willers
Original assignee: Mahle International GmbH
Current assignee: Mahle International GmbH
Priority date: 2013-02-20
Filing date: 2014-02-19
Publication date: 2015-12-30
Also published as: DE102013202761A1; WO2014128165A1

Abstract

The invention relates to a thermostat valve (40, 40a, 73), in particular for a coolant circuit (70) of a combustion engine (71), comprising a first fluid connection (45, 46, 47), a second fluid connection (45, 46, 47), and a third fluid connection (45, 46, 47), and a first control element (53), wherein a fluid link between at least two of the fluid connections (45, 46, 47) can be established and/or influenced by means of the first control element (53), wherein a channel (48, 56, 74, 80) is provided which can be shut by means of a second control element (50, 57, 75, 79), wherein an additional fluid link between two fluid connections (45, 46, 47) can be established by means of the channel (48, 56, 74, 80).

Description

thermostatic valve

description

Technical area

The invention relates to a thermostatic valve, in particular for a coolant circuit of an internal combustion engine, with a first fluid port, with a second fluid idanschluss and with a third fluid port, with a first actuator, wherein via the first actuator fluid connection between at least two of the fluid connections produced and / or can be influenced.

State of the art

In cooling systems of motor vehicles thermostatic valves can be used, which allow influencing the coolant circuit, in particular between the internal combustion engine, the heat exchanger and a circulation pump. This coolant circuit is used to cool the engine, with heat from the engine is delivered to the coolant. The heated coolant is cooled in the associated heat exchanger and fed back to the engine.

The thermostatic valve can influence the distribution of the coolant in the coolant circuit by releasing or closing flow paths by means of various positioning of an actuator in the thermostatic valve. By the thermostatic valve can be controlled whether the cooling liquid flows through the heat exchanger before it is returned to the internal combustion engine or whether the coolant flows past the heat exchanger. For this purpose, thermostatic valves are known in the art, which allow an opening or closing of the individual flow paths via a filled with wax element. In this case, caused by a phase transition of the wax, due to heating or cooling, a change in volume, which causes a movement of the actuator of the thermostatic valve.

In addition, thermostatic valves are known, which are adjusted by an electric motor control. These make it possible, unlike conventional thermostatic valves with wax element, to realize a higher number of different control states.

A disadvantage of the thermostatic valves according to the prior art that in electric motor driven thermostatic valves to represent a sufficiently high security against a failure of the thermostatic valve in addition a conventional thermostatic valve with wax element must be provided. Conventional thermostatic valves with wax element are also disadvantageous because they allow only a limited number of control states.

Presentation of the invention. Task. Solution. advantages

It is the object of the present invention to provide a thermostatic valve which is optimized over the prior art and in particular allows both an influence of the coolant circuit by a thermostatic valve with wax element as well as an influence by an externally adjustable element. Furthermore, it is the object of the invention to provide a coolant circuit with a thermostatic valve according to the invention. The object of the present invention is achieved by a heat exchanger with the features of claim 1.

An embodiment of the invention relates to a thermostatic valve, in particular for a coolant circuit of an internal combustion engine, with a first fluid connection, with a second fluid port and with a third fluid port, with a first actuator, wherein via the first actuator fluid connection between at least two of the fluid connections produced and / or can be influenced, wherein a channel is provided, which can be closed by a second actuator, wherein via the channel, a further fluid connection between at least two fluid connections can be produced.

About the fluid connections, the thermostatic valve is advantageously connected to a coolant circuit. A thermostatic valve with an actuator which can influence the fluid connection between the three fluid connections is particularly advantageous, since the fluid flow through the thermostatic valve can be preset via a single actuator. An additional channel, which has a further actuator is advantageous, since over this an additional fluid flow can be generated. At the same time, the additional fluid flow can be controlled independently of the fluid flow which is influenced by the first actuator.

In addition, it may be advantageous if the first actuator is adjustable by a wax element, wherein the second actuator is adjustable by an electric motor.

In a wax element, a phase transition of the wax can take place by heating or cooling. Such a phase transition is associated with a volume change of the wax. This volume change can be advantageously used to move the first actuator. In this way, a movement of the first actuator is dependent on the ambient temperature possible. In addition, the wax element can also be actively heated by a heating device, whereby the time of the phase transformation can be influenced from the outside.

The second actuator is advantageously adjustable by an electric motor. An electromotive control is particularly advantageous, as this makes it possible to control it independently of the prevailing ambient temperature. In addition, a control via an electric motor allows a greater variability of the control states of the second actuator. This includes, for example, a continuous opening and closing of the second actuator or an opening and closing depending on a predefinable value, such as a temperature level, a pressure level or the like.

In an alternative embodiment of the invention, it may be provided that the second actuator is drive-connected via a gear, in particular via a gear transmission, with an electric motor and is adjustable by the electric motor.

A connection of the actuator to an electric motor via a transmission is particularly advantageous because in this way a higher freedom of design for the arrangement of the individual components is achieved to each other.

It may also be expedient if the channel can be closed via a translational movement and / or a rotational movement of the second actuator.

A translational movement of the second steep member is particularly advantageous in terms of the tightness of the second actuator. A rotational movement of the actuator is in terms of the storage of the second actuator and in particular in interaction with a gear transmission advantageous.

Furthermore, it can be particularly advantageous if, furthermore, a fourth fluid connection is provided, wherein a fluid connection is established between the channel via the channel fourth fluid connection and at least one of the further fluid connections can be produced.

Via a fourth fluid connection, the fluid flowing in the coolant circuit can flow in or out at a further point of the thermostatic valve. The fourth fluid port can be brought via the channel in fluid communication with one of the other fluid ports. This can be advantageous if additional fluid flow paths are needed. Such a fluid flow path through the fourth fluid connection can be regulated by the second actuator independently of the first actuator.

An alternative embodiment of the invention may provide that a housing is provided, which has a first chamber, a second chamber and a third chamber, wherein via a first opening, a fluid connection between the first chamber and the second chamber can be produced and via a second Öff - A fluid connection between the second chamber and the third chamber can be produced, wherein the first opening and / or the second opening can be closed by the first actuator.

A housing having three chambers inside is particularly advantageous for the design of a thermostatic valve. It can take place via the openings which connect the chambers with each other, a fluid flow. By the first actuator while the openings can be completely or partially closed, so that the fluid flow is regulated by the openings. Advantageously, the first actuator is designed so that the first opening and the second opening can be opened or closed both together and independently.

It is, moreover, particularly advantageous if the first chamber is fluidically connected to the first fluid port, the second chamber is fluidically connected to the second fluid port or to the second fluid port and the fourth fluid port. circuit is connected and the third chamber is fluidly connected to the third fluid port.

By means of an above-described assignment of the fluid connections to the chambers, a targeted supply of different fluid flows into the chambers of the thermostatic valve can take place. This makes it particularly easy to influence the flow of fluid through the thermostatic valve.

It is also preferable if the second actuator is arranged in and / or on the channel and the channel is made in one piece with the housing.

Advantageously, the channel and the second actuator, or the channel, the second actuator and the second actuator driving electric motor and the transmission is arranged on the channel, that results in a compact unit. The channel can advantageously be formed either as an integral part of the housing or as an additional attachment, which is mounted as part of an assembly process to the housing.

The object of the coolant circuit with a thermostatic valve according to the invention is achieved by a coolant circuit having the features of claim 9.

An embodiment of the invention relates to a coolant circuit for an internal combustion engine with a thermostatic valve wherein one of the first three fluid ports is fluidly connected to an internal combustion engine, with a pump or with a heat exchanger or one of the first three fluid ports fluidisch with an internal combustion engine, with a pump or a heat exchanger is connected and the fourth fluid port is fluidly connected to at least one of the remaining fluid ports.

An inventive thermostatic valve is advantageously integrated in a coolant circuit of an internal combustion engine. There it regulates whether the coolant after leaving the engine is passed through a heat exchanger, or whether it is passed directly through a bypass duct on the heat exchanger back into the engine. Depending on the installation position of the thermostatic valve in the coolant circuit, the fluid connections of the thermostatic valve are connected to an internal combustion engine, a pump or a heat exchanger. In this way, the control of the fluid circuit can be carried out in a particularly simple manner. The channel either forms a branch past the thermostatic valve, which can be opened or closed independently of the first actuator in the thermostatic valve, or the channel forms a further connection of the coolant circuit to the thermostatic valve by providing a fluid connection between the fourth fluid port and one of the remaining fluid connections generated. In this way, the fluid flow in the coolant circuit can be influenced both by the first actuator, which can be temperature-sensitive, and by the second actuator, which can be advantageously controlled by an electric motor. This is advantageous because a larger number of control states can be achieved within the coolant circuit.

Advantageous developments of the present invention are described in the subclaims and the following description of the figures.

Brief description of the drawings

In the following the invention will be explained in detail by means of embodiments with reference to the drawings. In the drawings show:

1 shows a schematic view of a coolant circuit, with an internal combustion engine, a heat exchanger, a thermostatic valve and a pump for conveying the coolant, 2 shows a schematic view of the thermostatic valve, with an actuator, which can be moved by a thermosensible wax element, wherein the thermostatic valve is arranged downstream of the internal combustion engine,

3 shows a further schematic view of the thermostatic valve according to FIG. 2, wherein the thermostatic valve is arranged upstream of the internal combustion engine,

, 4 shows a schematic view of a thermostatic valve, wherein the thermostatic valve has an additional channel, in which an additional actuator for regulating the flow cross-section of the channel is arranged, which is in fluid communication with the thermostatic valve via a fluid connection, a further schematic view of a thermostatic valve according to FIG 4, wherein the channel is designed as a bypass to the thermostatic valve and connects two fluid connections of the thermostatic valve,

6 is a schematic view of a coolant circuit according to Figure 1, wherein a thermostatic valve with channel according to the figures 4 and 5 is arranged in the coolant circuit and the channel forms a bypass from the fluid connection of the heat exchanger branch to the fluid port of the engine branch, and a further schematic view of a Coolant circuit according to Figure 6, wherein the channel forms a bypass between the short-circuit branch and the engine branch. Preferred embodiment of the invention

1 shows a schematic view of a coolant circuit 1, in which an internal combustion engine 3, a pump 4, a thermostatic valve 2 and a heat exchanger 5 are integrated. The components mentioned are connected to each other via fluid lines. The heat exchanger 5 is flowed through by a cooling air flow 6. If necessary, this cooling air flow 6 can be accelerated by a fan 7.

Within the coolant circuit 1 essentially two fluid circuits are formed. From the thermostatic valve 2, the fluid flows through the pump 4 directly into the engine 3. The second fluid circuit in the coolant circuit 1 additionally includes the Heat exchanger 5. Instead of flowing to the fluid junction 9 directly to the thermostatic valve 2, the fluid flows through the heat exchanger 5 and after flowing through the heat exchanger 5 in the thermostatic valve 2. From the thermostatic valve 2, the fluid which has flowed through the heat exchanger 5 flows back via the pump 4 into the internal combustion engine 3.

In this way, it is possible by the circuit of the thermostatic valve, a fluid either only in the small fluid circuit in which the fluid junction 9 and the thermostatic valve 2 are connected to each other via the short circuit branch 8, flow or alternatively in the large fluid circuit through the heat exchanger 5.

The control of the thermostatic valve 2 can be made dependent on, for example, the operating situation of the motor vehicle in which the cooling circuit 1 is integrated or, for example, by the temperature prevailing in the coolant circuit 1. The coolant circuit 1 shown in Figure 1 serves as a basis for the representation of the following figures and corresponds to the prior art.

FIG. 2 shows a conventional thermostatic valve 20. The thermostatic valve 20 has a housing 34. Within this housing 34, three chambers 24, 25, 26 are formed. The chambers 24 to 26 are connected to each other through openings 38, 39, so that a fluid communication between the individual chambers 24 to 26 is possible. In the interior of the housing 34, an actuator 21 is arranged, which is formed in the example shown by a wax-filled element. Inside the Steltorgans 21, a region is provided, which is filled with a wax 30. Depending on the ambient temperature, this wax can be in a liquid phase or in a solid phase. Due to the transition between the solid and the liquid phase, there are volume changes of the wax 30. For this reason, the actuator 21 is expanded or contracted, resulting in the actuating action of the actuator 21. The wax 30 can either be heated or cooled by a fluid which flows around the actuator 21. Alternatively, a heating element may be thermally connected to the actuator 21, whereby a phase transition of the wax 30 can be caused.

By an expansion or contraction of the actuator 21, the individual chambers 24 to 26 can be completely separated from each other or also partially connected to each other. For this purpose, the opening 38, which connects the first chamber 24 with the second chamber 25 or the opening 39, which connects the second chamber 25 with the third chamber 26, through the upper closure member 22 or in the case of the opening 39 through the lower closure member 23rd be closed or released. The first chamber 24 has a fluid connection 27 from which, in the case of FIG. 2, a fluid flow 31 emerges. The second chamber 25 has a fluid connection 28, through which a fluid flow 32 flows into the second chamber 25. The third chamber 26 has a further fluid connection 29, through which a fluid flow 33 flows.

The flow direction of the fluid flows depends essentially on the positioning and the connection of the thermostatic valve 20 to the remaining coolant circuit. FIG. 2 shows a thermostatic valve 20, which is arranged inside the coolant circuit downstream of the internal combustion engine. The fluid flow 32 in this case represents a fluid flow, which flows from the output of the internal combustion engine to the thermostatic valve 20. The fluid flow 33 continues to flow from the thermostatic valve 20 to the heat exchanger 6. The third fluid flow 31 flows from the thermostatic valve 20 to the short-circuit branch 8. FIG. 3 shows a further thermostatic valve 20 a. The reference numerals of Figures 2 and 3 agree with each other. Notwithstanding the thermostatic valve 20 of Figure 2, the thermostatic valve 20a of Figure 3 is now incorporated according to the figure 1 in the coolant circuit 1. It follows that the fluid flow 35 is in communication with the short-circuit branch 8 and above with the output of the internal combustion engine 3. The fluid flow 36 passes from the thermostatic valve 20a to the pump 4 and thus to the input of the internal combustion engine 3. The fluid flow 37 flows from the heat exchanger 5 to the thermostatic valve 20a.

The operation of the thermostatic valve 20a corresponds to that of the thermostatic valve 20 of FIG. 2.

Via the expansion of the actuator 21 in the interior of the thermostatic valve 20a, a different mixing of the individual fluid streams 35, 36, 37 take place. 4 shows a thermostatic valve 40. The thermostatic valve 40 has a basically similar construction to the thermostatic valves 20 and 20a of Figures 2 and 3. In a housing 41 adjacent to each other, a first chamber 42, a second chamber 43 and a third chamber 44 are arranged. The first chamber 42 is connected to the second chamber 43 via an opening 63. The second chamber 43 is connected to the third chamber 44 via the opening 64. Via an actuator 53, which is arranged in the interior of the housing 41, the openings 63 and 64 can be released or closed. This is done via the closure member 54 and 55 of the actuator 53. The actuator 53 may also be a Wachsgefülltes element.

The thermostatic valve 40 has a fluid port 45, a fluid port 46 and a fluid port 47. Via the fluid connection 45, the fluid flow 60, which arrives via the short-circuit branch 8 from the internal combustion engine 3, flows into the first chamber 42. The fluid flow 62, which comes from the heat exchanger 5, flows into the lower chamber 44 via the fluid inlet 47. Via the fluid connection 46, the fluid flow 61 exits from the second chamber 43 and leads from there to the pump 4.

The thermostatic valve 40 of Figure 4 is integrated as well as the thermostatic valve 20a of Figure 3 according to the cooling circuit 1 shown in Figure 1 in the cooling circuit.

In addition to the already described functional range of the thermostatic valves 20 and 20a, the thermostatic valve 40 now has a channel 48. This channel 48 in turn has a second actuator 50, which is connected via a gear 52 with a motor 51. The motor 51 is preferably formed by an electric motor. In preferred embodiments, for example, a DC electric motor, a brushless DC motor or a stepper motor can be provided here.

The housing 41 has a further fluid connection 49. Via this fluid connection 49, the channel 48 communicates with the second chamber 43 in fluid communication. Via the actuator 50, the fluid flow from the channel 48 through the fluid port

49 are completely or partially prevented in the second chamber 43.

For this purpose, the actuator 50 can be moved via the gear 52 by the motor 51 in such a way that the flow cross-section of the channel 48 is completely or partially released or closed. In advantageous embodiments, the actuator 50 is infinitely adjustable, so that the fluid flow through the channel 48 can be controlled in very fine steps or continuously. The channel 48 is also acted upon via the fluid flow 62, which comes from the heat exchanger 5 with the coolant.

In FIG. 4, the thermostat valve 40 is acted upon by the heat exchanger 5 via two independent paths. The passage through the fluid port 47 is limited only by the predetermined flow cross-section of the fluid port 47. The fluid flow through the channel 48, which passes via the fluid port 49 into the second chamber 43, can by the actuator

50 are influenced independently of the remaining thermostatic valve 40, in particular by the actuator 53. The arrangement of Figure 4 allows that the coolant which passes through the channel 48 in the thermostatic valve 40, the actuator 53 flows around, whereby an expansion or shortening of the actuator 53 may result as a result of a change in temperature. In contrast to the fluid quantity which penetrates via the fluid connection 47 into the lower chamber 44 of the thermostatic valve, an active influencing of the actuator 53 can be carried out via the fluid portion which flows through the channel 48 into the thermostatic valve 40.

The control of the actuator 50 in the channel 48 can be effected by an arbitrarily predetermined value. This can be done for example due to a measured temperature in the coolant circuit or by another predetermined value. The channel 48 of the thermostatic valve 40 may be embodied as an integral part of the housing 41. For example, the channel 48 may be cast in the housing 41, in alternative embodiments, it is also foreseeable that the channel 48 is formed by an additional pipeline, which is subsequently attached to the housing over a further Mo day step. Preferably, the channel already has receiving points to which the gear 52 and the motor 51 can be attached. In this way, a final assembly of the thermostatic valve is simplified as a whole.

The actuator 50 can be adjusted depending on the design of the transmission 52 and the motor 51 both by a translational and a rotary or by a mixed form of a translational and rotational movement. A translational movement of the actuator 50 is particularly advantageous in terms of the possible achievable tightness of the Fluidanschiusses 49. In addition, the sealing of the channel 48 for the transmission 52, soft in this case, the motor movement translated into a translational movement to accomplish in a simple manner.

In one embodiment, which provides a rotational movement for adjusting the actuator 50, in particular the storage of Steltorgans 50 is to represent in a simple way but also the translation from the motor 51 to the actuator 50, which can be accomplished for example by a gear transmission.

The individual chambers 42, 43 and 44 of FIG. 4 are formed by a plurality of walls which protrude from the housing 41 on the inside of the housing 41. The connection of the chambers with each other is realized via the openings 63 and 64, respectively. The schematic representation of the thermostatic valve 40 shown in Figure 4 only serves to illustrate the basic structure of the thermostatic valve 40. It has no limiting character with respect to the possible embodiments of the thermostatic valve 40. FIG. 5 shows a further thermostatic valve 40a, which essentially corresponds to the structure of the thermostatic valve 40 of FIG. The structure of the housing 41 a differs only insignificantly from that of the housing 40. In the following, the deviations from FIG. 4 will be described. In contrast to FIG. 4, the housing 41a has no further fluid connection. The channel 56 is arranged on the thermostatic valve 40 a such that the fluid idstrom 62 a part of the fluid is separated into the channel 56 and another part flows into the lower chamber 44 Within the channel 56, an actuator 57 is arranged, which via a transmission 59 is connected to a motor 58. The structure of the actuator 57 of the gear 59 and the motor 58 corresponds to the structure of the actuator 50 of the gear 52 and the motor 51 of Figure 4.

In contrast to the channel 50 shown in FIG. 4, the channel 56 terminates at the fluid connection 46 of the fluid flow 61. The channel 56 thus creates a bypass path, which makes it possible to pass part of the fluid past the thermostatic valve 40a. The embodiment of the thermostatic valve 40a shown in FIG. 5 allows a bypass between the fluid flow 62, which comes from the heat exchanger to the fluid flow 61, which continues to flow to the pump 4 and then to the internal combustion engine 3.

The expansion or shortening of the actuator 53 in the interior of the thermostatic valve 40 a is thus only dependent on the proportion of the fluid flow 62, which flows into the chamber 44 and the fluid flow 60, which flows into the chamber 42.

The thermostatic valves 40 and 40a of Figures 4 and 5 are arranged as well as the thermostatic valve 20a of Figure 3 at the same point as the thermostatic valve 2 in the cooling medium circuit 1 of Figure 1. In alternative embodiments, however, it is also possible to arrange the thermostatic valves 40 and 40a shown in FIGS. 4 and 5 corresponding to the thermostatic valve 20 of FIG. 2 at the fluid intersection 9 of the fluid circuit 1 of FIG. 6 shows a further coolant circuit 70 with the elements internal combustion engine 71, pump 72, thermostatic valve 73, heat exchanger 76, which is traversed by a cooling air stream 78, which is as needed sucked by a fan 77 or blown through the heat exchanger 76. The thermostatic valve 73 shown in Figure 6 corresponds substantially to the thermostatic valve 40a of Figure 5. The channel 74, which has the actuator 75 and the transmission or the drive motor thus creates a bypass between the coolant branch, which comes from the heat exchanger 76, to the coolant branch , which continues to the pump 72. Overall, the thermostatic valve 73, the channel 74 and the actuator 75 from FIG. 6 form the thermostatic valve 40a shown in FIG. 5, including the channel 56.

A coolant circuit 70 of FIG. 6 offers the possibility of directing part of the coolant from the heat exchanger 76 past the thermostatic valve 73 directly back into the internal combustion engine 71. Since the actuator 75 can be controlled independently of the temperature of the coolant within the fluid circuit 70, a fluid supply of the internal combustion engine 71 can take place independently of the coolant temperature. Thus, the temperature-dependent thermostatic valve 73 is supplemented by an additional functionality.

FIG. 7 shows an alternative representation of the fluid circuit 70 of FIG. 6. Deviating from FIG. 6, the channel 80 is now arranged such that the short-circuit branch, which flows from the fluid junction 81 in the direction of the thermostatic valve 73, directly to the fluid branch leading to the pump 72 flows, is connected. The channel 80 thus creates a bypass between the short circuit branch and the fluid branch leading to the pump 72. The region which is formed by the thermostatic valve 73, the channel 78 and the actuator 79, substantially corresponds to the structure of the thermostatic valve 40a and the channel 56 of Figure 5. Figures 6 and 7 are each intended to illustrate the scope of a thermostatic valve 40 and 40a of FIGS. 4 and 5. In addition to the arrangements of Figures 6 and 7, the thermostatic valve 73 may also be arranged at the fluid junction 81. The channel 80 or 74 can each form either a bypass between two fluid connections of the thermostatic valve 73 or alternatively, as indicated in Figure 4, form an additional supply of one of the fluid branches in the thermostatic valve 73.

In an alternative embodiment, it may be provided that the thermostatic valve has two channels, so that a complete bridging of the thermostatic valve is possible. In this case, the short-circuit branch is connected to the fluid branch via a first channel, which leads to the pump. A second channel connects the fluid branch, which comes from the heat exchanger with fluid branch, which leads to the pump.

The exemplary embodiments illustrated in FIGS. 1 to 7 have no limiting character with regard to an inventive implementation of a thermostatic valve. They serve only to clarify the functional principle. In particular with regard to the geometric design or the practical embodiment of the thermostatic valve, FIGS. 1 to 7 do not represent a limiting character.

Claims

Thermostat valve (40, 40a, 73), in particular for a coolant circuit (70) of an internal combustion engine (71), with a first fluid port (45, 46, 47), with a second fluid port (45, 46, 47) and with a third Fluid closure (45, 46, 47), with a first actuator (53), wherein over the first

Actuator (53) a fluid connection between at least two of the fluid connections (45, 46, 47) producible and / or influenced, characterized in that a channel (48, 56, 74, 80) is provided, which via a second actuator (50, 57, 75, 79) is closable, wherein via the channel (48, 56, 74, 80), a further fluid connection between at least two fluid connections (45, 46, 47) can be produced. Thermostat valve (40, 40a, 73) according to one of the preceding claims, characterized in that the first actuator (53) is adjustable by a waving element, wherein the second actuator (50, 57, 75, 79) by an electric motor (51 , 58) is adjustable. Thermostat valve (40, 40a, 73) according to any one of the preceding claims, characterized in that the second actuator (50, 57, 75, 79) via a transmission (52, 59), in particular via a gear transmission, with a

Electric motor (51, 58) is drivingly connected and by the electric motor (51, 58) is adjustable. Thermostat valve (40, 73) according to any one of the preceding claims, characterized in that the channel (48, 56, 74, 80) via a translational movement and / or a rotational movement of the second actuator (50, 57, 75, 79) closable is. Thermostat valve (40, 40a, 73) according to one of the preceding claims, characterized in that there is further provided a fourth fluid port (49), wherein via the channel (48) a fluid connection between the fourth fluid connection (49) and at least one of the further Fluidanschlüs- se (45, 46, 47) can be produced. A thermostatic valve (2, 20, 20a, 40, 40a, 73) according to one of the preceding claims, characterized in _'that a housing (41, 34) is provided which comprises a first chamber (24, 42), a second chamber (25, 43) and a third chamber (26, 44), wherein via a first opening (38, 63), a flight connection between the first chamber (24, 42) and the second chamber (25, 43) can be produced and via a second opening (39, 64) a fluid connection between the second chamber (25, 43) and the third chamber (26, 44) can be produced, wherein the first opening (38, 63) and / or the second opening (39, 64) through the first actuator (21, 53) is closable. Thermostat valve (2, 20, 20a, 40, 40a, 73) according to claim 6, characterized in that the first chamber (24, 42) is fluidically connected to the first fluid port (27, 45), the second chamber (25, 43 ) is fluidly connected to the second fluid port (28, 46) or to the second fluid port (46) and the fourth fluid port (49), and the third chamber (26, 44) is fluidically connected to the third fluid port (29, 47) (40, 40a, 73) according to one of the preceding claims, characterized in that the second actuator (50, 57, 75, 79) in and / or on the channel (48, 56, 74, 80) is arranged and the channel ( 48, 56, 74, 80) is made in one piece with the housing (41). Coolant circuit (70) for an internal combustion engine with a thermostatic valve (40, 40a, 73) according to at least one of the preceding claims, characterized in that in each case one of the first three fluid ports (45, 46, 47) fluidly with an internal combustion engine (71), with a pump (72) or with a heat exchanger (76) is connected or that in each case one of the first three fluid ports (45, 46, 47) fluidly with an internal combustion engine (71), with a pump (72) or with a heat exchanger (76 ) is connected and the fourth fluid port (49) fluidly connected to at least one of the remaining fluid ports (45, 6, 47).