DE10304837A1 - Valve with full closure, especially for motor vehicle cooling and/or heating system, has arrangement for enabling relative position of valve bodies in valve chamber to be varied via actuator - Google Patents

Abstract

The device has a valve housing (168), a valve chamber (166) from which at least 3 flow channels (160,162,164) branch off and at least two valve bodies (170,172) in the valve chamber and rotatable about an associated axis that interact with valve seats (188,190,192) in the valve chamber. There is an arrangement (194) for enabling the relative position of the valve bodies in the chamber to be varied via an actuator. An independent claim is also included for the following: (a) a cooling and/or heating circuit, especially for a motor vehicle.

Description

The invention is based on one Valve for controlling volume flows, in particular volume flows in one Cooling and / or Heating circuit, for example of a motor vehicle, or from one Cooling and / or Heating circuit according to the preambles of independent claims 1 and 16th

A cooling or heating circuit, for example one Motor vehicle, usually includes a heat source to be cooled, For example, the vehicle engine using a cooling medium to be cooled by free or forced convection. The temperature difference over the Is heat source from the heat input and the size of the volume flow of the coolant dependent, while the absolute temperature of the cooling medium through the heat input the heat source, heat dissipation via any in the cooling circuit located cooler elements and the heat capacities of the involved materials is determined.

For example, the internal combustion engine Motor vehicle before overheating to protect and the waste heat of the engine may be used to heat the passenger compartment to be able to in the cooling and heating circuit of the vehicle pumped a coolant that the excess heat of the Motors can pick up and dissipate to the desired extent. Such a cooling or heating circuit of a motor vehicle generally comprises various interconnected sub-branches, such as a cooler branch, a bypass branch to bypass the cooler or a heating heat exchanger branch. For example, about a radiator branch excess heat of the coolant be released to the environment, or via the heating heat exchanger branch a heating heat exchanger fed for further use become. The distribution of the coolant flow on the various branches of the cooling and heating circuit typically about controlled a number of valves. For example, sits on Shut-off valve in the by a cooler element coming supply line to the heat source and a further shut-off valve in a bypass line to the cooler element. So the desired coolant temperature at the beginning of the heat source Mix a chilled and an uncooled one Coolant flow can be set. Alternatively to the two shut-off valves a 3-way mixing valve can also be used.

Especially in the field of motor vehicle development is currently working intensively on concepts for more efficient heat management worked in the vehicle. Among other things, this is also about a needs-based Control of the engine cooling system with the aim of Fuel consumption and emissions from the internal combustion engine decrease in order to be able to comply with exhaust gas limit values or the comfort of the vehicle to increase. Doing so critical limits of the thermal component load not exceeded must, on the other hand but sufficient amounts of heat Heating purposes are provided. This can be done through optimization of the coolant volume flow and the load-dependent Regulation of the temperature level of the engine can be achieved. For needs-based Regulation, i.e. to achieve an optimized distribution of the coolant flows in the cooling or Heating circuit, are therefore part of a so-called thermal management for the Motor vehicle has proposed controllable valves for some time, which will replace the previous thermostatic valves in the future.

From the DE 35 16 502 A1 A temperature control device for the coolant of an internal combustion engine is known which has a coolant control valve in the feed line or the bypass line of a cooling circuit, which valve can be actuated by means of a servomotor as a function of, for example, the coolant temperature. The servomotor essentially consists of an electric actuator, the output-side actuator of which is operatively connected to a valve closure of the coolant control valve. A control element is assigned to the valve, to which individual characteristic map variables, in particular the coolant temperature and the outside temperature, detected by sensors of the internal combustion engine can be supplied.

From the DE 100 53 850 A1 A valve for controlling the volume flows in the heating and cooling system of a motor vehicle is known, which in one exemplary embodiment has two valve flaps which can be rotated about a drive shaft arranged eccentrically to the valve housing. The valve flaps of the valve of the DE 100 53 850 A1 are rotatably mounted on a common shaft and interact with associated valve seats of the valve chamber of the valve. In conjunction with the valve seats, the valve flaps can open or close the valve openings. The valve flaps of the DE 100 53 850 A1 each consist of a valve sealing head and a valve rod assembly. The valve sealing head and valve linkage are each connected via a ball joint.

Starting from the previously cited status the underlying technology of the present invention is the object to create a valve which is in a cooling and / or heating circuit, especially a motor vehicle, a need-based regulation and in particular an optimized distribution of the coolant flows of the cooling or Heating circuit enables.

The valve according to the invention with the features of independent claim 1 has against The advantage of the prior art valves is that both the coolant volume flow through the engine and the temperature level can be regulated from a functional unit. An electrically controlled main water pump for controlling the coolant volume flows in the cooling and heating circuit is therefore no longer absolutely necessary. With the valve according to the invention, the volume flow, for example through the cooler branch, can be throttled independently of the volume flow through the bypass branch of a cooling circuit. In this way it is possible to individually reduce the volume flows in the cooling or heating circuit and thus regulate a desired mixing ratio of the volume flows and thus a desired temperature level.

A total shut-off of the valve branching partial circuits is also possible in an advantageous manner with the mixing valve according to the invention. The Volume flow through the valve can be completely shut off if necessary become. In this way it is also possible, for example Coolant flow shut off by the engine of a motor vehicle and thus a as quickly as possible To ensure heating of the internal combustion engine of the motor vehicle.

The fastest possible heating of the internal combustion engine of a motor vehicle leads in an advantageous manner for a quick reduction of the pollutant components in the exhaust system of the motor vehicle. About that the engine heats up quickly achieved its optimal efficiency.

These are advantageously function options of the valve according to the invention realized with a single drive (actuator). For this purpose, the valve according to the invention Means that allow the relative position of the valve body to each other in the valve chamber of the valve to vary only one actuator. With the help of these funds the movement of the actuator in different movements of the valve body Valve transferred

A cooling and / or heating circuit with such a mixing valve according to the invention, which ensures an exact, needs-based adjustment of the coolant volume flows the corresponding positioning of the valve body in the valve chamber of the valve allows can, for example, to a reduced fuel consumption of the Internal combustion engine as well as a reduced pollutant emissions and one contribute to improved service life of the motor of a motor vehicle. In particular, through targeted thermal management of the cooling and / or heating circuit of a motor vehicle also improve the efficiency of its drive motor.

Through the measures listed in the dependent claims are advantageous developments and improvements in the independent claims specified valve or the claimed cooling and / or heating system with such a valve possible.

The valve according to the invention has an actuator on who the means that enable the relative position of the valve body in the valve chamber vary. An electric motor is an example of an actuator to the, possibly with an intermediate gear, the position of funds over determines a drive shaft or a drive wheel. Preferably, a DC motor with or without brushes, or a stepper motor use as an actuator. In further exemplary embodiments, Use of a suitable gear, for example a lifting magnet be used. The drive for the valve according to the invention is typically outside of the valve housing can, however, in other embodiments also in principle in the valve housing may be arranged the actuator is connected to the fluid to be controlled, so that on an elaborate Shaft seal could be dispensed with.

The means that make it possible the relative position of the valve body in the valve chamber of the valve according to the invention to vary can be easily and advantageously as Form mechanical means that are operatively connected to the actuator with the valve bodies to be set can produce or produce.

In particular, one can do this about an axis Use a rotatable control or cam disc that is mechanical Tools, such as guide pins, Bolts or guide contours their rotational movement in a corresponding control movement of the valve body Valve translated. In this way, this mechanical means constitutes a kind of control program for the valve body of the valve according to the invention represents a defined control of the individual valve body in desired Way enables although only a single drive (actuator) for the valve is provided..

In an advantageous embodiment of the valve according to the invention there is only one such control that the position all existing valve bodies can vary.

The control means, which is an operative connection, in particular a rotational operative connection between the actuator and the valve bodies can be realized directly in the valve chamber in an advantageous manner integrate the valve. In this way it is avoided that time-consuming Seal for the control unit of the valve according to the invention become necessary. This is particularly advantageous if at the same time a wet-running one Motor or a wet-running gear as drive for the valve be used.

In other embodiments, the control but can also be arranged outside the valve housing.

The axis of rotation of the Mechanical control element arranged parallel to the axis of rotation of the valve body. It when the axis of rotation of the mechanical control element is concentric with the axis of rotation of the valve body or is even identical to it is particularly advantageous. In this way it is possible to build a compact valve which enables the valve bodies to be positioned precisely.

The valve according to the invention can be particularly advantageous Realize as an eccentric valve in which the axis of rotation the valve body is eccentric in the valve housing is arranged. The valve body are both movable to each other and rotatable around the common eccentric axis arranged. Because the common axis of rotation of the valve body is eccentric in the valve housing runs, to lead the valve body When opening or close the flow channels of the valve a combined rotating and lifting movement. This combined rotary and lifting movement to the valve sealing heads the valve body the valve housing touch only in the valve seats. In particular with a suitably chosen joint between the valve linkage and the valve sealing head results in a reliable closing of the Flow channels. In particular introduces between the valve linkage and the valve sealing head arranged joint to compensate for Manufacturing tolerances that otherwise occur when using an eccentric valve inadequate sealing of the flow channels could lead.

The valve bodies in the valve housing are advantageously elastic Biased means such that the flow channel is released in the valve if the actuator should fail. So can in this way, for example, the cooler branch of an associated one Heating and cooling circuit open be so that in the event of failure of the drive unit of the valve according to the invention a maximum cooling capacity can be achieved, and a defect, for example, of the internal combustion engine by overheating is excluded.

The valve body in the valve are thus through the mechanical control means against the bias of the elastic Means provided. You can do this For example, spring elements are used, the position of the single valve body when the actuator is deactivated, for example a currentless drive motor, It can be determined in an advantageous manner with the mixing valve according to the invention a cooling and / or heating circuit realize with several degrees of freedom. So it is simple Way possible with a single functional unit both the coolant volume flow through the engine, as well as the temperature level of both the coolant as well as the one to be cooled Regulate elements.

With the mixing valve according to the invention Is it possible, a defined mixing ratio to realize its coolant volume flows on the output side, but the volume flow through the valve is also completely shut off if necessary can be. For example, by using the valve according to the invention with full shut-off in a cooling and / or heating circuit for a motor vehicle, the coolant volume flow blocked by the engine, for example during a cold start to be as possible as possible to ensure rapid heating of the engine. It is advantageous here in particular that these functions with a single drive will be realized. The valve according to the invention thus enables the full shut-off of a 3-way mixing valve.

Several exemplary embodiments are shown in the drawing of a valve according to the invention shown, which are explained in more detail in the following description. The figures of the drawing, their description and the claims included numerous features in combination. Those skilled in the art will appreciate these features also consider individually and to make other useful combinations sum up.

Show it:

1 a cooling and heating system using an electrically driven mixing valve according to the invention for a motor vehicle in a simplified, schematic representation,

2 a first embodiment of a mixing valve according to the invention in a perspective, sectional view,

3 a detailed perspective view of the arrangement of the valve body of the valve according to the invention 2 .

4 a Datail representation of the mechanics of the position of the valve body of the valve according to the invention 2 .

5 a second embodiment of a mixing valve according to the invention in a schematic representation,

6 a representation of the valve according to the invention 5 with changed position of the valve elements,

7 a further representation of the valve according to the invention 5 and 6 in a further position of the valve members,

8th the valve according to the invention 5 to 7 in a fourth position of the valve members,

9 a further embodiment of a mixing valve according to the invention in a schematic representation.

description of the embodiments

In 1 is a cooling and heating circuit in simplified, schematic representations 10 represented a motor vehicle. An internal combustion engine to be cooled 12 has a first coolant inlet 14 in the area of his engine block 16 . and a first coolant outlet 18 which is via a return line 20 and a radiator inlet 22 with a cooler element 24 of the cooling circuit 10 connected is. The cooler element 24 , also referred to below as a cooler, is in turn via a cooler outlet 26 and a connecting line 28 with the coolant inlet 14 of the internal combustion engine 12 connected.

For circulating the coolant in the cooling circuit 10 of the internal combustion engine 12 is in the connecting line 28 a coolant pump 30 which in the embodiment of the 1 via a control unit 46 is electronically regulated. Mechanical coolant pumps are also possible in other exemplary embodiments of the cooling and / or heating circuit according to the invention.

In the area of his cylinder head 32 shows the internal combustion engine 12 a second coolant outlet 34 on that over a connecting line 36 with a heating heat exchanger 38 of a heating branch 40 of the cooling and / or heating circuit 10 connected is. In this heating branch 40 becomes part of the from the engine 12 escaping, heated coolant used to over the heating heat exchanger 38 , the thermal energy stored in the hot coolant for heating, for example one in 1 vehicle interior, not shown, to use. The need-based control of the heating function is in 1 only schematically, by controlled heating valves 42 respectively. 44 indicated.

The heating valves 42 respectively. 44 of the heating branch 40 are in the embodiment of the cooling and heating circuit 10 according to 1 just like a bypass valve 31 the engine cooling circuit via a control unit 46 controlled and regulated. The control unit 46 , which can also be the engine control unit of the vehicle, for example, is connected to various sensors which are located in 1 are not shown for the sake of clarity and only by electrical connecting lines 48 should be hinted at. Via these sensors the control unit 46 current parameters of the cooling circuit or of the engine are fed in, which can then be compared with a data stored in the control unit in order to obtain corresponding actuating variables for the active components of the cooling and heating circuit 10 to investigate. In addition to the parameters of the cooling circuit 10 , such as the coolant temperature at various locations, the engine temperature and in particular the engine temperature at various temperature-critical locations of the engine is also sent to the control unit 46 transmitted. As further input signals for the control unit 46 In addition, the fuel consumption and the pollutant emissions of the internal combustion engine can be sent to the control unit via appropriate sensors 46 be transmitted. The control unit can also transmit these signals from the software for controlling and regulating the internal combustion engine 46 serves in the embodiment of 1 also the needs-based control of a cooling fan 50 which is used to increase the cooling capacity of the cooler 24 of the cooling circuit is assigned. The cooling fan 50 consists of a fan 52 and a motor that drives the fan 54 , the control data and possibly also the energy supply via corresponding electrical connection lines from the control unit 46 receives.

The control unit also regulates 46 also the performance of the coolant pump 30 which in the embodiment of the 1 is an electrically driven coolant pump.

Parallel to the cooler element 24 is in the cooling and heating circuit 10 a bypass line 29 that the return line 20 directly with the connecting line 28 combines. Via the bypass line 29 it is possible that from the coolant outlet 18 escaping cooling water heated by the engine bypassing the cooler element 24 right back to the engine block 16 through the coolant inlet 14 supply. To control and regulate the relative volume flows through the cooler element 24 on the one hand, or through the bypass line 29 on the other hand, is in the illustrated embodiment of a cooling and heating circuit according to the 1 a 3-way bypass valve 31 provided, which is also from the control unit 46 is controlled or regulated.

In particular, the control unit 46 one control variable each for the actuator of the valve 31 or also for the corresponding actuators of the heating valves 42 respectively. 44 of the heating branch 40 generated to regulate the current actual engine temperature to an optimal target engine temperature. The actuation of the actuators in the cooling and heating circuit 10 provided valves and in particular the control of the bypass valve 31 happens in such a way that the volume flow regulated by the valves is linearly proportional to the manipulated variable for the respective actuator of the valve. In this way, the valves can be set exactly according to the specifications of the control unit, so that the coolant volume flow corresponds very precisely to the specifications, for example one in the control unit 46 stored, time-dependent temperature model for the engine can be adjusted.

To set the optimum engine temperature, the relative coolant volume flow through the radiator is controlled using the controllable valves according to the invention 24 or through the bypass line 29 regulated. For example, in the starting phase of the engine 12 , to be described later, the connecting line 20 to the engine cooler 24 be completely closed and the 3-way valve (bypass valve) 31 towards the bypass line 29 if necessary completely or only slightly opened or completely closed. In this way, the optimal working temperature of the engine can be reached quickly 12 possible like that that the operating conditions of the lower fuel consumption and the lower pollutant emissions of the engine can be achieved early after a cold start of the engine.

After the optimal engine temperature has been reached, the radiator supply line can be switched off 20 through the bypass valve 31 , ie through the bypass connection of the 3-way valve 31 , opened and the bypass line 29 be throttled to the excess by the engine 12 generated thermal energy via the cooler element 24 as well as the cooling fan 50 to be able to deliver to the environment. So it is with the mixing valve according to the invention 31 In a manner to be described in more detail, it is possible, if necessary, to regulate both a defined mixing ratio of the volume flows of two connections on the outlet side and also a full shut-off of the volume flow by the valve.

In 2 is a first embodiment of a valve according to the invention 131 , according to the 3-way valve 31 (Bypass valve) in 1 shown in a perspective sectional drawing. The 3-way mixing valve 131 according to 2 has an inlet channel 160 , a first outlet duct 162 and a second outlet channel 164 that with the inlet duct 160 flees. The three flow channels 160 . 162 and 164 are through a valve chamber 166 which in the valve housing 168 is formed, connected to each other.

Also in the valve chamber 166 two valve bodies are arranged 170 respectively. 172 which around a common axis 175 are rotatably mounted and via a control disc 194 can be put. The axis of rotation 175 the valve body 170 respectively. 172 runs eccentrically in the valve chamber 166 so that when the control disc rotates 194 the valve body 170 respectively. 172 perform a combined rotating and lifting movement.

In the embodiment of the 2 are the valve bodies 170 respectively. 172 , each made at least in two pieces and each have a valve linkage 176 respectively. 178 and one with the valve linkage via a joint 184 respectively. 186 connected valve sealing head 180 respectively. 182 , The valve sealing head 180 respectively. 182 is approximately mushroom-shaped and over the joint 184 respectively. 186 opposite the valve linkage 176 respectively. 178 movable. The valve sealing heads 180 respectively. 182 work in the valve housing 168 trained valve seats 188 . 190 respectively. 192 together. The valve seats 188 . 190 and 192 of the valve according to the invention according to the embodiment of the 2 are integral with the valve body 168 educated. Another configuration of the valve seats is also possible.

By rotating the control disc 194 become the valve body 170 respectively. 172 around the axis 175 rotated and into the valve seats 188 . 190 respectively. 192 drove in or out again. The control disc 194 showing the relative position of the valve body 170 respectively. 172 to each other in the valve chamber 166 is also around the axis 175 rotatable. The control disk is movable on a guide pin 110 arranged, which is concentric to the axis of rotation 175 the valve body runs. The control disc 194 engages in a guide contour 210 of the guide pin 110 a (see 2 ). About this guide contour 210 when the control disc rotates 194 around the axis of rotation 175 also the axial distance of the control disc 194 to the valve rods 176 respectively. 178 changed. In this way, a mechanism is realized that allows the control disc 194 to be temporarily connected to the valve bodies or, if necessary, to decouple the valve bodies from the control disk. The position of the valve body using the control disk will be explained in more detail in the further description.

The control disc 194 is operatively connected to an actuator, not shown. An electric motor, for example, is suitable as the drive, which, optionally with an intermediate gear, controls the position of the control disk 194 determined via a drive shaft or a drive wheel. Preferably, a DC motor with or without brushes, or a stepper motor can be used as an actuator. In further exemplary embodiments, a lifting magnet can also be used, for example, using a suitable gear. The drive for the valve according to the invention 131 is typically outside the valve body 168 , however, can in principle also be arranged in the valve housing or the actuator could be connected to the fluid to be controlled, so that an expensive shaft seal could be dispensed with.

The control disc 194 itself can be both inside and outside the valve chamber 166 be arranged. With an arrangement outside the valve chamber 166 there is the advantage that the functionality of the control disc 194 cannot be impaired by any solid particles that may be present in the cooling medium (e.g. molding sand). The arrangement of the control disk on the dry side of the valve housing, however, requires corresponding bushings in the valve housing for the actuating elements of the valve body, so that in such an embodiment, an increased effort in sealing the valve housing would be necessary. Advantages and disadvantages of the possible arrangements for the control disk must be weighed against the background of the use of the valve according to the invention.

Concentric to the axis of rotation 175 are two reset fields 196 respectively. 198 in the valve chamber 166 provided the position of the valve members 170 respectively. 172 define with deactivated actuator. The return springs also have this 196 respectively. 198 one each in the axial direction of the axis of rotation 175 curved end 200 respectively. 202 , which against the Ventilge strands will 176 respectively. 178 the valve elements presses. The valve is thus also designed so that the valve is opened in an emergency by the return springs if the actuator fails 196 or 198 on the valve body 170 respectively. 172 act and bring them into predefined positions. In this way, for example, the cooler branch of an assigned heating and cooling circuit (see 1 ) are opened, so that in the event of failure of the drive unit of the valve according to the invention, a maximum cooling capacity can be achieved, and a defect, for example, of the internal combustion engine due to overheating, is excluded.

Against the torque of the return springs 196 respectively. 198 acts the control disc, which is operatively connected to the drive unit of the actuator 194 showing the relative position of the valve body 170 respectively. 172 in the valve chamber 166 can vary in accordance with the control signals of the actuator. The control disc 194 of the valve of the invention according to the embodiment of the 2 to 4 has parallel to the axis of rotation 175 running pins or bolts 204 and. 206 that against the associated valve linkage 176 respectively. 178 intervene and this when the control disc rotates 194 against the moments of the return springs 196 respectively. 198 adjust. In this way, the flow channels 160 . 162 and 164 optionally opened or closed. These pins or bolts 204 respectively. 206 can, for example, directly with the control disc 194 in this case, however, should have a certain elasticity in order to prevent excessive torque input into the valve linkage of the valve bodies in the event that a valve body has already reached its end position in the valve seat, the rotational movement of the control disk 194 but still persists.

3 respectively. 4 show two views of the valve body 170 respectively. 172 as well as the control disk, which provides the valve body 194 , For the sake of clarity, the valve housing was 168 not drawn again. Furthermore, in 3 the valve sealing head 180 not shown or from the valve linkage 176 solved so that a clear view of the control mechanism of the control disc 194 is made possible.

As in 4 the axial pins or bolts are clearly visible 204 or 206 of the control disc 194 with the corresponding position of the control disc on the valve linkage 176 respectively. 178 so that the valve body can be adjusted by turning the control disc. In the embodiment of the 4 are the bolts 204 respectively. 206 not in one piece with the control disc 194 trained but are made of feathers 205 respectively. 207 worn, which in turn with the control disc 194 are connected. This ensures that there is no additional torque in the valve linkage 176 respectively. 178 if a valve element has reached its end position, the control disc is entered 194 is still rotated by the actuator.

The arrangement of the axial bolts 204 respectively. 206 on the control disc 194 or the shape of the points of application of the axial bolts 204 respectively. 206 on the valve rods 176 respectively. 178 defines the position and the relative variation of the valve body 170 respectively. 172 to each other and thus corresponds to an on control program for the valve body, which by rotation of the control disc 194 can expire. The valve linkage 176 points, for example, as in 4 an outrigger in the form of an arc can be seen 208 on which defines the time at which the axial bolt 204 the control disc 194 with the valve linkage 176 comes into active connection.

In the 2 The position of the valve elements shown corresponds, for example, to the position when the internal combustion engine is cold started. The valve 131 according to the bypass valve 31 in 1 is not activated, in the case of an electric motor as an actuator for the position of the valve members, this is not energized, for example. The return springs 196 respectively. 198 , which take over the function of "fail-save springs", put those in the valve housing 168 arranged valve body 170 respectively. 172 so that the cooler duct 164 is open so that maximum cooling is achieved.

For example, if the internal combustion engine is to reach its operating temperature as quickly as possible in order to achieve its optimum efficiency and to reduce the pollutant concentration in the exhaust gas as quickly as possible, the valve according to the invention can be used to ensure that there is no coolant flow through the internal combustion engine , In particular, it is possible to ensure that both valve outlet channels 162 respectively. 164 be completely shut off, so that both the volume flow through the bypass duct and the volume flow through the cooler duct correspond to the cooling and heating circuit 1 becomes zero. This can be achieved by using the control disc 194 the valve body 172 in the valve seat 192 the cooler-side outlet duct 164 turns into it. The valve body 170 is based on its in 2 Cold start position shown from the control disc 194 in this case not driven but by the return spring 196 into the valve seat of the bypass-side first outlet channel 162 pressed.

Will the control disc 194 in the same direction, ie in the representation of the 2 clockwise, further rotated, so the axial pin or bolt comes 204 for contact with the circular arch-like bracket 208 of the valve linkage 176 , By further rotating the control disc in this direction of rotation, the valve sealing head 180 from the bypass valve seat 190 raised and clockwise in 2 turned. The bypass channel is thereby released, so that the coolant volume flow in the cooling channels of the combustion motors can circulate.

With further rotation of the control disc 194 in the previously described sense of rotation is about the guide contour 210 in the form of a ramp function in the guide pin 110 the control disc is formed, the control disc 194 in the axial direction of the axis of rotation 175 method. In this case, the control disc corresponds to the direction of rotation of the drive shaft 194 proceed in such a way that the distance between the control disc 194 and the valve linkage 176 respectively. 178 is enlarged. In the representation of the 3 the control disc is pushed axially upwards via the ramp function. This will make the valve body 172 unlocked, ie the axial bolt 206 the control disc 194 is no longer against the valve rod 178 on. The return spring 198 can by means of its axial end 202 a moment on the valve linkage 198 exercise and thus pushes the valve body 172 to a firm stop with the valve body 170 , Mixed operation of the valve according to the invention is possible in this fixed position of the valve bodies relative to one another. By turning the two outlet openings in or out 162 respectively. 164 the relative volume flow through the bypass branch ( 162 ) or the cooler branch ( 264 ) are regulated. A desired mixing ratio and thus a desired temperature of the coolant can be achieved in this way by actuating the valve according to the invention by means of a control device, as is the case for example with the reference number 46 in 1 is shown, can be set very precisely.

The control of the valve body is regulated in the valve according to the invention in such a way that, in the event of a failure of the actuator, the "fail-save function" via the return springs 196 respectively. 198 is realized in such a way that the radiator outlet channel 164 is open; to avoid overheating of the internal combustion engine, for example.

With the valve according to the invention according to the embodiment in the 2 to 4 it is thus possible to set a defined mixing ratio between the volume flows of two flow channels and, if necessary, to completely shut off the volume flow through the valve. For this purpose, the valve inlet can be closed using a valve body. These functions are advantageously implemented with a single drive which is operatively connected to the control disk of the valve.

5 to 8th show a second embodiment of a mixing valve according to the invention for controlling volume flows. The valve housing 268 This embodiment is essentially the same as the valve housing 168 of the first valve 131 according to 2 , The valve housing 268 of the second embodiment has an inlet duct 260 , a first outlet duct 262 and a second outlet channel 264 on. The three flow channels 260 . 262 and 264 are about one in the valve body 268 existing valve chamber 266 principally connected with each other. The valve according to the invention 231 according to 5 to 8th includes two valve bodies 270 respectively. 272 that in the 5 to 8th are reproduced in a simplified schematic representation in order to illustrate the basic functioning of this exemplary embodiment of the valve according to the invention. The valve body 270 respectively. 272 of the embodiment according to the 5 to 8th act with valve seats 288 . 290 and 292 together. The valve seats 288 . 290 and 292 these embodiments are in one piece with the valve housing 268 trained, but could in principle also be designed differently and, for example, have additional sealants.

The valve body 270 respectively. 272 of the second embodiment each have a valve sealing head 280 respectively. 282 and a the associated valve sealing head with an axis of rotation 275 connecting valve linkage 276 respectively. 278 , The valve body 270 respectively. 272 can in particular also in the type of valve body 170 respectively. 172 of the embodiment 131 the 2 to 4 be constructed. So it can be provided, also for the valve bodies 270 respectively. 272 to arrange a joint, in particular a ball joint, in each case between the valve sealing head and the valve rod assembly. The schematic representation of the valve body in the 5 to 9 is only intended to describe the way they work and does not represent any restriction with regard to the design of the shape.

The valve body 270 respectively. 272 are designed to be movable relative to one another and rotatable about a common axis 275 arranged. The axis 275 runs eccentrically in the valve housing 268 , Because the common axis of rotation 275 of the two valve bodies 270 respectively. 272 is arranged eccentrically in the valve housing, the valve body guide when opening or closing the flow channels 260 . 262 and 264 a combined rotation and stroke movement, which leads to the valve sealing heads 280 respectively. 282 the valve housing 268 only touch in the assigned valve seats. In particular with a suitably chosen joint between the valve linkage 276 respectively. 278 and the valve sealing head 280 respectively. 282 as is the case for the exemplary embodiment 131 the 2 to 4 is shown, but also in the embodiment of 5 to 8th can be used, there is a reliable closing of the flow channels. In particular, a joint arranged between the valve rod and the valve sealing head leads to a compensation of manufacturing tolerances, which could otherwise lead to inadequate closing of the flow channels when an eccentric valve is used.

The valve body 270 serves, for example, the first outlet duct 262 which, for example, with the bypass channel 29 according to 1 can be connected to shut off. The valve body 272 can connect to the cooler duct in an analogous manner 20 according to 1 open or close. The two valve bodies of the invention are moved Valve according to 5 to 8th over a cam 294 in what contours 258 respectively. 259 are incorporated, each with a pin 304 respectively. 306 intervenes, each with a valve stem 276 respectively. 278 connected is. The contours 258 respectively. 259 in the cam 294 are designed such that in certain ranges of rotation of the cam 294 just one of the valve bodies 270 respectively. 272 is moved. The cam 294 is about an axis of rotation 277 rotatable and is driven, for example, via a shaft by an electric motor. The axis of rotation 277 the cam 294 runs parallel, but at a distance from the axis of rotation 275 the valve body 270 respectively. 272 ,

The cam is over the drive shaft 294 connected to an actuator, which can be constructed in the manner of the first embodiment, so that as a drive for the adjusting unit of the valve according to the invention 231 and especially for the cam 294 an electric motor can also be used. Preferably, but not exclusively, a DC motor with or without brushes or a stepper motor is used. In further exemplary embodiments, a lifting magnet can also be used here using a suitable gear. The drive shaft, as well as the drive motor and others, the actuator of the valve 231 forming components are in the 5 to 8th is not shown for the sake of clarity.

Between the drive shaft of the actuator and the cam 294 can be introduced elastic means that allow the cam 294 and thus also the valve bodies to be set assume a defined position if the actuator is not active. These elastic means can be shaped, for example, in the form of one or more spiral springs. The actuator then becomes the cam against the moment of the spiral spring 294 adjust if it is activated.

The cam 294 can, as already for the first embodiment 131 of the valve according to the invention described, in principle inside or also outside the valve housing 268 be arranged.

In 5 is the valve according to the invention 231 shown in a position in which both the first outlet channel 262 (for example a bypass channel according to 1 ) and the second outlet duct (for example a cooler duct) are closed. This position of the valve according to the invention 231 May be activated, for example, directly after the start of the internal combustion engine in order to allow the internal combustion engine to heat up quickly and thus to quickly achieve the optimal operating conditions. In the position of the valve according to the invention 5 no coolant is pumped through the internal combustion engine, so that the engine can heat up quickly. Now the cam disc 294 as by the arrow 308 in 5 indicated, rotated clockwise, so the first outlet channel 262 opened like this in 6 is shown. Only when the cam 294 was turned so far that the first outlet duct 262 is fully open (see 6 ), due to the curve contour 259 the second outlet duct in the cam disc 264 (Radiator) open. The valve body 270 however, remains in accordance with the shape of its guide contour 258 in its position.

In the representation of 7 are both the first outlet duct 262 (Bypass), as well as the second outlet channel 264 (Radiator) open. Will the cam 294 now back again, in the direction of the arrow 310 rotated, so the valve body 270 pushed back to its starting position like this in 8th is shown. In this case there is only the second outlet channel 264 (Radiator) opened so that when using the valve according to the invention in the cooling and heating circuit according to 1 the full cooling capacity would be available.

Due to the special shape of the guide contours 258 respectively. 259 the rotary movement of the cam disc becomes an actuating movement of the valve body 270 respectively. 272 translated. It is also advantageous with the valve according to the invention according to the embodiment of the 5 to 8th possible to set the valve body of the valve relative to each other with only one actuator.

9 shows a further embodiment 331 of the mixing valve according to the invention. The valve housing 368 , along with flow channels essentially corresponds to the exemplary embodiment according to 5 to 8th and should therefore not be discussed further here. In the valve chamber 366 of the valve housing 368 of the embodiment according to 9 there are three valve bodies 370 . 372 such as 373 . that with appropriate valve seats 388 . 390 and 392 interact The two valve bodies 370 and 372 are rigidly connected. The third valve body 373 is movable to the first two valve bodies 370 respectively. 372 on the same axis of rotation 375 arranged. The two rigidly coupled valve bodies 370 respectively. 372 are controlled via a guide contour 358 in which a spigot 305 that is rigid with the valve body 372 connected, intervenes. By turning the cam 394 can thus the position of the two valve bodies 370 respectively. 372 can be set so that the volume flow entering the valve corresponds to the position of the valve elements on the two outlet channels 362 and 364 is divided. With the first two valve bodies 370 respectively. 372 is thus the mixing ratio between the first outlet channel 362 (for example according to a bypass channel 1 ) and the second outlet channel 364 (For example a cooler channel) can be set in this way, a very precise temperature control of the coolant, for example a cooling and / or heating circuit for a motor vehicle, according to 1 possible.

With the third valve body 373 is additionally the closure or throttling of the inlet duct 360 of the valve according to the invention 9 possible. The third valve body 373 is over a guide contour 359 in the cam 394 posed. One on the valve stem of the valve body 373 attached pin engages in the guide contour 359 on and turns when the cam rotates 394 guided according to the shape of the guide contour.

In the shut-off position, i.e. if the inlet duct 360 through the valve body 373 is closed, the valve drive, not shown, constantly applies a moment which the valve sealing head of the valve body 373 against the valve seat of the inlet duct 360 presses and closes the inlet channel. If the valve drive fails due to a defect, the inlet duct can be blocked 360 can be opened by the water pressure itself, which increases the safety of the overall system and in particular the safety of the unit to be cooled.

As a drive for the adjustment unit of the valve according to the invention 331 according to 9 an electric motor, preferably a DC motor with or without brushes, or a stepper motor can also be used. However, the use of an electromagnetic actuator, for example a lifting magnet with a correspondingly designed transmission, is also conceivable. The arrangement of the drive of the cam 394 can also in this embodiment both inside and outside of the valve housing 368 be arranged.

With the presented valves according to the invention Is it possible, an exact mixing ratio of flow rates two outlet channels of the valve. In particular, it is also possible Volume flow through the valve by closing the inlet channel or to zero by closing both outlet channels. In order to is that in some of his examples The valve described is particularly suitable in a thermal management system for a Motor vehicle to be used. With the help of the valve according to the invention the coolant flows in one Cooling and / or Heating circuit for control a motor vehicle in a defined manner and the cooling or Optimize the heating output of the circuit.

The valve according to the invention is not based on the the drawings and the description shown embodiments limited.

The valve according to the invention is not limited to use in a cooling and / or heating circuit for a Motor vehicle.

In particular, the valve according to the invention not limited on a 3-way valve. The underlying inventive idea can be in an analogous manner also for Valves with additional Inlet or outlet channels realize.

The valve according to the invention is not limited to the use of only one control or cam.

Claims (18)

Valve for controlling volume flows, in particular volume flows of a cooling and / or heating system ( 10 ) of a motor vehicle, with a valve housing ( 168 . 268 . 368 ), with a valve chamber ( 166 . 266 . 366 ), of which at least three flow channels ( 160 . 162 . 164 ; 260 . 262 . 264 ; 360 . 362 . 364 ) branch off, as well as with at least two, in the valve chamber ( 166 . 266 . 366 ) arranged around an assigned axis ( 175 . 275 . 375 ) rotatable valve bodies ( 170 . 172 ; 270 . 272 ; 370 . 372 . 373 ) with valve seats ( 188 . 190 . 192 ; 288 . 290 . 292 ; 388 . 390 . 392 ) the valve chamber ( 166 . 266 . 366 ) interact, characterized in that means ( 194 . 294 . 394 ) are provided, which allow the relative position of the valve body ( 170 . 172 ; 270 . 272 ; 370 . 372 . 373 ) in the valve chamber ( 166 . 266 . 366 ) to vary via an actuator. Valve according to claim 1, characterized in that the means ( 194 . 294 . 394 ) are operatively connected to the one actuator. Valve according to claim 1 or 2, characterized in that the actuator is a motor, in particular an electrically driven one Engine. Valve according to claim 1, 2 or 3, characterized in that the means ( 194 . 294 . 394 ) at least one mechanical control element ( 194 . 294 . 394 ) include that with the valve bodies ( 170 . 172 ; 270 . 272 ; 370 . 372 . 373 ) of the valve ( 31 . 131 . 231 . 331 ) can be brought into operative connection. Valve according to one of the preceding claims, characterized in that the valve body ( 170 . 172 ; 270 . 272 ; 370 . 372 . 373 ) a common axis of rotation ( 175 . 275 . 375 ) exhibit. Valve according to claim 4 or 5, characterized in that the at least one mechanical control element ( 194 . 294 . 394 ) around an axis ( 175 . 277 . 377 ) is rotatable. Valve according to claim 4, 5 or 6, characterized in that the at least one mechanical control element ( 194 . 294 . 394 ) between the actuator and the valve bodies ( 170 . 172 ; 270 . 272 ; 370 . 372 . 373 ) of the valve ( 31 . 131 . 231 . 331 ) is arranged. Valve according to one of claims 4 to 7, characterized in that the at least one mechanical control element ( 194 . 294 . 394 ) in the We noticeably disc-shaped ( 194 . 294 . 394 ) is trained Valve according to one of claims 4 to 8, characterized in that the at least one mechanical control element ( 194 . 294 . 394 ) with at least two valve bodies ( 170 . 172 ; 270 . 272 ; 370 . 372 . 373 ) of the valve ( 31 . 131 . 231 . 331 ) interacts. Valve according to one of the preceding claims 4 to 9, characterized in that the at least one mechanical control element ( 194 . 294 . 394 ) in the valve chamber ( 166 . 266 . 366 ) of the valve ( 31 . 131 . 231 . 331 ) is arranged. Valve according to one of the preceding claims 5 to 10, characterized in that the axis of rotation ( 175 . 277 . 377 ) of the at least one mechanical control element ( 194 . 294 . 394 ) parallel to the axis of rotation ( 175 . 275 . 375 ) the valve body ( 170 . 172 ; 270 . 272 ; 370 . 372 . 373 ) of the valve ( 31 . 131 . 231 . 331 ) runs. Valve according to one of the preceding claims 5 to 11, characterized in that the axis of rotation ( 175 ) of the at least one mechanical control element ( 194 ) concentric to the axis of rotation ( 175 ) the valve body ( 170 . 172 ; 270 . 272 ; 370 . 372 . 373 ) of the valve ( 131 ) runs. Valve according to one of the preceding claims 5 to 12, characterized in that the common axis of rotation ( 175 . 275 . 375 ) the valve body ( 170 . 172 ; 270 . 272 ; 370 . 372 . 373 ) eccentric in the valve housing ( 168 . 268 . 368 ) the valve ( 131 ) runs. Valve according to one of the preceding claims, characterized in that the valve body ( 170 . 172 ; 270 . 272 ; 370 . 372 . 373 ) of the valve ( 31 . 131 . 231 . 331 ) via elastic means ( 196 . 198 ) are biased. Valve according to claim 14, characterized in that the elastic means ( 196 . 198 ) Spring elements ( 196 . 198 } exhibit. Cooling and / or heating circuit, in particular for a motor vehicle, with at least one heat source ( 12 . 16 . 32 ), especially an internal combustion engine ( 12 ), at least one cooler element ( 24 ) and with at least one valve ( 31 . 131 . 231 . 331 ) which are connected by means of 20 . 10 . 29 . 14 . 18 ) are connected to one another in such a way that a coolant in the connecting means both the heat source ( 16 . 32 ), as well as the cooler element ( 24 ) can flow through, characterized in that the valve ( 31 . 131 . 231 . 331 ) Medium ( 194 . 294 . 394 ), which make it possible to determine the relative position of at least two valve bodies ( 170 . 172 ; 270 . 272 ; 370 . 372 . 373 ) of the valve ( 31 . 131 . 231 . 331 ) in the valve chamber ( 166 . 266 . 366 ) to vary via an actuator. Cooling and / or heating circuit according to claim 16, characterized in that the valve ( 131 . 231 . 331 ) a 3-way mixing valve ( 31 ) is. Cooling and / or heating circuit according to claim 16 or 17, characterized in that the valve ( 131 . 231 . 331 ) with a bypass line ( 29 ) to bypass the at least one cooler element ( 24 ) connected is.