EP1881205A1 - Electro-hydraulic system, method for starting it and corresponding starting device - Google Patents

Abstract

The method involves operating multiple manifold valves (2) by input stage (7), on which a fluid operating pressure rests. A fluid admission of a main stage (6) is accomplished such that temporarily after fluid admission of input stage the operating pressure (13) supplying source rests only against the main stage. The input stage switches to main stage for switching pressure, which is developed against the input stage, and initial switching positions of the main stage determines electrical control signals. An independent claim is also included for a starting device for starting multiple arrangement of indirect electrically operated multiple manifold valve of an electro hydraulic system.

Description

The invention relates to a method for starting up an electro-fluidic system containing a multiple arrangement of indirectly electrically actuable multi-way valves, wherein a fluidic pilot pressure is applied to the electrically actuatable pilot stages of the multiway valves and a fluidic operating pressure is applied to the main stages of the multiway valves which can be actuated by the pilot stages.

The invention further relates to a starting device for starting up an electro-fluidic system containing a multiple arrangement indirectly electrically actuated multi-way valves, the multi-way valves containing a main stage fed with a fluidic operating pressure in the normal operating state and at least one pilot control stage fed with a fluidic pilot pressure and actuatable by means of electrical control signals.

Finally, the invention relates to an electro-fluidic system equipped with a multiple arrangement of indirectly electrically operable multiway valves and a starting device of the aforementioned kind.

For fluidic actuation of machines or other equipment frequently electro-fluidic systems are used, which according to the above embodiments contain a multiple arrangement indirectly electrically actuated multi-way valves, multi-way valves that contain a fluidic pressure medium to connected consumers distributing main stage and used for their actuation electro-fluidic pilot stage. Such equipped electrofluidic system is for example from the DE 4230414 C2 out.

When commissioning such electro-fluidic systems certain deficiencies may occur, which are associated with a delay in the construction of the pre-control pressure applied to the pilot stages. At the start of operation, for example, after a long break in operation or when restarting after an emergency stop situation, the main stages a hitherto shut off operating pressure medium and the pilot stages a hitherto shut off pilot pressure medium is supplied, at the same time the pilot stages are so electrically controlled in that they bring about the desired fluidic control of the main stages. The main stages are actuated and positioned by the pilot pressure of the pilot stages. However, the main stages only respond to this at a certain pressure threshold of the pilot pressure. Until this switching pilot pressure has built up, the main stages consequently assume at least partially indifferent switching positions which do not coincide with the desired switching positions. The result is uncontrolled activities of consumers connected to the main stages, which are already being supplied with the operating pressure medium, which is also gradually building up. Only when the pilot pressure the required pressure level has reached, set the predetermined by the electrical control switching positions of the main stages. Until then, the uncontrolled movements can lead to conflict situations and even damage to possibly colliding equipment.

To prevent this problem, it has already been considered to lower the threshold of the main stages by increasing their pressure application areas. This would, however, a large increase in the dimensions of the multi-way valves connected, which is not accepted in most cases or even for reasons of space is not feasible.

The present invention is therefore based on the object to propose measures that counteract the problem of uncontrolled movements of connected consumers when commissioning an electro-fluidic system.

In conjunction with the above-cited method, this object is achieved in that one applies the operating pressure source supplying the operating pressure to the main stages only after the pre-control stages a switching of the main stages ensuring switching switching pilot pressure has built up and the pilot stages the initial switch positions abut the main stages determining electrical control signals.

As long as the multi-way valves do not yet have the switching pilot pressure required to actuate the main stages, the main stages therefore remain disconnected from the operating pressure source. Thus, even no operating pressure medium, possibly uncontrolled, be passed to the connected consumers. Only when the required switching pilot pressure is applied and all pilot stages through corresponding electrical control are positioned or directed as desired, one switches the operating pressure source, so that the system is gradually filled with correct switching positions of the main stages with pressure medium. In such an operating mode, one is completely independent of the set pressure of the main stages and one can ensure a safe start-up of the electrofluidic system even with small-sized multi-way valves. Expediently, the procedure is such that at a certain initialization time, a pilot pressure source supplying the pilot pressure is applied to the pilot stages while the operating pressure source supplying the operating pressure is applied to the main stages only after the pilot pressure at the pilot stages has reached the switchover pilot pressure. The initial control positions of the main stages predetermining electrical control signals for the pilot stages are expediently applied to avoid delays in the period between - each including - the initialization and reaching the switching pilot pressure and preferably simultaneously with the application of the pilot pressure source to the pilot stages.

Although separate sources of pressure can be used as the supplier for the pilot pressure and the operating pressure, an arrangement is generally recommended in which one and the same pressure source is used both as the operating pressure source and as the supply pressure source.

In conjunction with a starting device having the features cited above, the underlying object is also achieved by a on the one hand to a pilot pressure source and on the other hand to the pilot stages of the multi-way valves connectable or connected pilot pressure feed channel, in the course of which the fluid connection to Pilot pressure source selectively shut-off or releasing first valve device is turned on, in conjunction with an on the one hand to an operating pressure source and on the other hand to the main stages of the multi-way valves connectable or connected operating pressure feed channel, in the course of the fluid connection to the operating pressure source optionally shut-off or releasing second valve device is turned on, wherein there is a time delay element which can be activated with or after the first valve device has been switched over into the release position, which causes a time-delayed switching over of the second valve device which until then occupied the shut-off position into the release position.

Such a starting device designed in this way allows the previously explained by the start-up method according to the invention operation. The time delay element is in particular designed so that the caused by it time delay is at least so large that could build up in the meantime required for the switching of the main stages switching pilot pressure with certainty.

The time delay element is expediently designed so that the time delay that can be triggered by it is variably adjustable. This allows easy readjustment, especially in cases where the electrofluidic system has been retooled or an exchange of components has taken place.

The starting device expediently has a central fluid inlet to which both the pilot pressure feed passage and the operating pressure feed passage are connected and to which a pressure source simultaneously supplying the pilot pressure medium as well as the operating pressure medium can be connected, in particular a compressed air source.

The components of the starting device are expediently combined to form a structural unit. For example, it is possible to design the starting device such that it can be combined with a valve arrangement containing the multiway valves to form an assembly. For example, the starting device may be a start module which, like the multiway valves, can be installed on a connection plate of a valve arrangement.

The time delay element can be embodied as an electrical time delay element, as a fluidic time delay element or as a combined electro-fluidic time delay element. An electrical time delay element - the term "electrical" should also be understood as the term "electronic" - expediently cooperates with an electrically controllable second valve device, which may be of the directly or indirectly electrically operable type. An indirectly electrically operable second valve device may include an amplifier function, so that suddenly a large cross section for the operating pressure medium can be released.

A fluidic time delay element is expediently used in conjunction with a fluidically actuatable second valve device. It may comprise a storage volume which is gradually filled with pressure medium starting from an initialization time, wherein the switching of the second valve means takes place when after a certain time a certain pressure level has been set in the storage volume. The time delay can be influenced in this case by specifying the filling rate of the storage volume, which is determined for example by an upstream throttle device, which can be conveniently set variably.

Finally, the object cited above is also achieved by an electrofluidic system which has a multiple arrangement of indirectly electrically actuatable multi-way valves and a starting device of the previously described type. The multi-way valves may be components of a valve battery, which is combined with the starting device to form an assembly.

Figur 1

eine bevorzugte erste Bauform der zur Durchführung des erfindungsgemäßen Verfahrens geeigneten erfindungsgemäßen Anordnung, wobei ein elektrisches Zeitverzögerungsglied zum Einsatz kommt, und

Figur 2

eine alternative Bauform der erfindungsgemäßen Anordnung, die mit einem fluidischen Zeitverzögerungsglied ausgestattet ist.

The invention will be explained in more detail with reference to the accompanying drawings. In this show:

FIG. 1

a preferred first embodiment of the inventive arrangement suitable for carrying out the method according to the invention, wherein an electrical time delay element is used, and

FIG. 2

an alternative design of the arrangement according to the invention, which is equipped with a fluidic time delay element.

Unless otherwise stated, the following statements refer to all illustrated embodiments.

Figures 1 and 2 respectively show a schematic representation of a designated in its entirety by reference numeral 1 electrofluidic system with a multiple arrangement indirectly electrically actuated multi-way valves 2 and a particularly advantageous start-up enabling starter 3. For better identification, the starting device 3 is provided with a dotted frame ,

The multi-way valves 2 can be distributed arbitrarily within the electro-fluidic system 1. You can in particular be fixed to different objects. However, the exemplary measure according to which the multi-way valves 2 are designed as components of a valve battery identified as a whole by reference numeral 4 is particularly advantageous.

The valve battery 4 includes a one-piece or modular connection plate 5, which is equipped with the multi-way valves 2. The multi-way valves 2 can be attached to the outside of the connection plate 5 or even completely or partially integrated into the connection plate 5.

In other words, the indirectly electrically operable multiway valves 2 are pilot operated valves. They each contain a main stage 6 which controls the distribution of a fluidic operating pressure medium and an electro-fluidic pilot stage 7 associated therewith.

In known manner, the main stage 6 includes at least one main valve member, which is associated with at least one Beaufschlagungsfläche, which is acted upon by a pilot pressure medium to specify the switching position of the main valve member and thus the main stage 6. The pressurization by the pilot pressure medium is controlled by the pilot stage 7, which ensures, depending on the electrical excitation state, that the at least one loading surface is acted upon or relieved of the pilot pressure medium.

The switching operation of the main stage 6 can take place exclusively by fluid force or in addition by mechanical spring force.

The pilot stage 7 usually includes one or two electrically actuable pilot valves, such as solenoid valves, Piezo valves or electrostatic microvalves. The components of the pre-control stage 7 can be combined into one unit or arranged locally distributed on or in the associated main stage 6.

Your electrical control signals receive the pilot stages 7 via a first electrical line assembly 8 of a belonging to the electro-fluidic system 1 or external electronic control device 11th

As an example, the main stages 6 are designed as 5/2-way valves. They each contain five connections and allow two switching positions. Other functionalities are also possible.

The main stages 6 of all multiway valves 2 are connected to a common operating pressure feed channel 12. About this the connection with the operating pressure medium supplying pressure source 13 is possible. The delivered pressure medium is expediently compressed air, although the electro-fluidic system 1 could also be operated with other gases or with hydraulic media.

All main stages 6 are also connected to at least one common discharge channel 14, 15, which forms a venting channel in the pneumatic mode of operation of the embodiment. Each discharge channel 14, 15 is directly or with the interposition not shown silencer with the atmosphere in connection.

Each main stage 6 further communicates with at least one and expediently with two individual working channels 16, 17, to which a consumer 18 can be connected, for example a drive actuatable by fluid force.

In the two possible switching positions of a respective main stage 6, the connected consumer 18 can be controlled such that its output element 22 moves selectively in one of two opposite directions. The main stage 6 can assume two switching positions, in each of which one or the other working channel 16, 17 is connected to the operating pressure feed channel 12 and the respective other working channel 17, 16 to one of the discharge channels 14, 15.

All pilot stages 7 of the multiway valves 2 are connected to at least one common pilot pressure feed channel 23. This is like the operating pressure feed channel 12 connected to a pressure source 13, which provides a preferred pneumatic pilot pressure medium. By way of example, operating pressure feed channel 12 and pilot pressure feed channel 23 are connected to a common pressure source 13. For this purpose, the starting device 3 has a suitable fluid inlet 24. However, separate fluid inlets for the operating pressure feed channel 12 and the pilot pressure feed channel 23 may be present to allow an independent feed with on the one hand an operating pressure medium and on the other hand a pilot pressure medium.

Via the pilot pressure feed channel 23, each pilot stage 7 can be supplied with pilot pressure medium under a predetermined pilot pressure. An additional pilot pressure discharge channel 25 allows the discharge of pressure or venting of the individual pilot stages 7. All pilot stages 7 can be connected to a common pilot pressure discharge channel 25, as well as each pilot stage 7 can individually have their own pilot pressure discharge channel 25 if necessary.

The pilot pressure medium supplied via the pilot pressure feed channel 23 is, in controlled manner by the pilot stages 7, used to spend the main stage 6 as described in the respective desired switching position.

The starting device 3 enables a safe and clearly defined commissioning of the electro-fluidic system due to a particularly advantageous fluid supply to the main and pilot control stages 6, 7 of the multi-way valves 2.

For this purpose, the starting device 3 includes a switched on in the course of the pilot pressure feed channel 23 first valve means 26. This first valve means 26 may alternatively be positioned in two switching positions, on the one hand the flow from the pressure source 13 to the pilot stages 7 releasing release position and the other a the pressure source 13 from the pilot stages 7 severing shut-off. Expediently, the first valve device 26 has a 3/2-way valve function, through which the first channel section 23a of the pilot pressure supply channel 23 located between the first valve device 26 and the pilot stages 7 can be simultaneously relieved in the shut-off position and, in particular, vented to the environment.

The first valve device 26 is electrically actuated and contains an electrically activatable drive device 28, which is connected via a first electrical control line 32 to the electronic control device 11.

The first valve device 26 may be designed to be directly or indirectly operable.

In the course of the operating pressure supply channel 12 is a second valve means 27, which optionally one the Pressure source 13 with the main stages 6 connecting release position or a pressure source 13 can be separated from the main stages 6 shut-off position. The current switching position of the second valve device 27 is set directly or indirectly by the electronic control device 11 in conjunction with a time delay element 34.

In the normal operating state of the electro-fluidic system, both valve devices 26, 27 assume the release position, so that all main stages 6 and all pilot stages 7 are supplied with the operating pressure medium and pilot pressure medium required for their normal operation. At the main stages 6, a fluidic operating pressure is present, at the pilot stages 7, a fluidic pilot pressure. In this normal state can be influenced by the described electrical control of the pilot stages 7 by means of the electronic control device 11, the switching position of the main stages 6 and therefore the operating state of the connected loads 18.

There are cases where the electro-fluidic system 1 must be shut down. This can be, for example, retooling or even emergency situations. In such shutdown phases, the fluidic system is largely depressurized or vented. In particular, a pressure relief of the main stages 6 and the pilot stages 7 takes place. For this purpose, for example, a non-illustrated in the drawing, sitting between the fluid inlet 24 and the pressure source 13 relief or vent valve are opened, so that the pressure from the operating pressure feed passage 12 and the pilot pressure feed channel 23 can escape. Relief of the pilot pressure supply channel 23 can also be switched by switching in the embodiment the first valve means 26 are effected in the shut-off position.

The re-commissioning of the electrofluidic system 1 after a standstill phase proves to be problematic in conventional systems, because the main stages 6 already at one time the gradually incoming operating pressure medium to the connected consumers 18 lead to which they may not take the desired switching position. The reason for this is in the start-up phase still relatively low, only gradually building pilot pressure, which reaches a pressure level only after a certain time, which is sufficient to produce the necessary switching force for the associated main stage 6. Such a problem is circumvented in the present electrofluidic systems 1 by applying the operating pressure source supplying the operating pressure to the main stages 6 only after the pre-control stages 7, a switching of the main stages 6 ensuring switching switching pilot pressure has built up and to the Pre-control stages 7 abut the electrical control signals which are required to position the pilot stages 7 so that they impose their initial switching positions the associated main stages.

The main stages 6 are thus only then fed with the operating pressure medium after they have previously been "directed", that is spent in the specifically desired during commissioning switching position.

Preferably, one reaches the pre-control stages 7 temporally downstream Fluidbeaufschlagung the main stages 6 by the already mentioned time delay element 34 of the starting device 3. This time delay element 34 is expediently activated at the same time or after the time to which the first valve device 26 has been switched from its shut-off position to the release position. With this switching to the release position, the filling of the pilot pressure supply channel 23 begins with pilot pressure medium. If a predetermined time delay period has elapsed, the time delay element 34 now also effects the additional switching of the second valve device 27 into the release position. The time delay span is designed to be sufficient to provide pressure build-up in the pilot pressure feed passage 23 to the required switching pilot pressure.

In the embodiment of Figure 1, an electrical time delay element 34 is used. It is connected on the input side to the electronic control device 11 and can receive an electrical initialization signal from it. On the output side, it is capable of outputting a switching signal after the predetermined time delay span, which signal is transmitted via a second electrical control line 33 to the second valve device 27 that can be actuated electrically in this case.

By way of example, the second valve device 27 of the exemplary embodiment of FIG. 1 has a multi-stage design. It comprises a directly in the course of the operating pressure supply channel 12 turned on pneumatic main valve 35, an internally pilot-operated, electrically actuated pilot valve 36 is connected upstream. A branching from the operating pressure feed channel 12 control channel 37, in the course of which the pilot valve 36 is turned on, leads to the control input 38 of the main valve 35. The output of the time delay element 34 is connected to the electric drive unit 42 of the pilot valve 36.

The time delay element 34 receives its initialization signal from the electronic control device 11 preferably simultaneously with the enable signal transmitted to the first valve device 26. After elapse of the set time delay, the switching signal reaches the electric drive unit 42, so that the previously shut off the connection between the control input 38 and the operating pressure supply channel 12 pilot valve 36 switches to the passage position and a sufficiently high control pressure to the control input 38 forwards the Main valve 35 to switch from the previously occupied shut-off in the release position.

With the booster function described here, the control of a main valve 35 large nominal diameter is favored. However, an electrofluidic pilot control is not absolutely necessary. A direct electrical actuation of the main valve 35 by a switching signal would be possible.

The exemplary embodiment of FIG. 2 illustrates a possible embodiment in connection with a fluidic time delay element 34.

In this variant, the second valve device 27 is designed to be fluid-actuated and can be switched from the predetermined for example by spring bias shut-off by a fluidic switching signal supplied to the release position, wherein the fluidic switching signal has a predetermined switching pressure. This switching pressure is gradually built up, starting with the time of switching the first valve device 26 to the release position, with a certain time delay.

Specifically, the corresponding circuit can be realized, for example, in that the fluidic time delay element 34 has a storage volume 43 which is connected on the inlet side to the first channel section 23a of the pilot pressure supply channel 23 located downstream of the first valve device 26, while on the outlet side it is connected to that for a fluidic control signal susceptible control input 44 of the second valve device 27 is connected. With the timing of switching of the first valve device 26, operating pressure medium branched from the first passage portion 23a flows into the storage volume 43, which is thereby gradually filled with increasing pressure. If the filling pressure of the storage volume 43 has reached the required switching pressure, the switching of the second valve device 27, which is designed by way of example as a pneumatic 2/2-way valve, takes place into the release position.

The filling rate of the storage volume 43 is expediently influenced by an upstream throttle device 45. This sits in the storage volume 43 with the first channel section 23a connecting channel branch. Preferably, it is variably adjustable in terms of its throttling intensity, which makes it possible to specify the filling rate and thus the time delay span variable. The maximum time scale available is determined by the size of the storage volume 43.

One of the throttle device 45 in parallel, in the direction of the first channel portion 23a opening check valve 52 allows emptying of the storage volume 43 when the first valve means 26 is connected in the shut-off position.

All embodiments have in common that the electronic control device 11, the pilot control stages 7, the initial switching positions of the main stages 6 predetermining electrical control signals simultaneously with the switching of the first valve means 26 in the release position supplies. Although a subsequent electrical control of the pilot stages 7 would also be possible, but should always take place before the second valve means 27 the main stages 6, the operating pressure switches on.

The starting device 3 may be independent of the valve battery 4, independent device. It can then form a structural unit in which all its components are combined. The dotted frame can in this respect, for example, represent a base body 46 of the starting device 3, which is equipped with the functional components and also the required fluid channels.

Preferably, the already mentioned fluid inlet 24 is formed on the base body 46 and also an electrical interface 47 for the electronic control device 11 may be located thereon. In addition, the base body 46 may be provided with a pilot pressure fluid outlet 48 and an operating pressure fluid outlet 49, which both fluid outlets 48, 49 each form a fluidic interface in the course of the pilot pressure supply channel 23 and the operating pressure supply channel 12 through which the fluid connection to Valve battery 4 can be produced.

It is also possible, the starter 3, as indicated by dash-dotted lines in Figure 1 exemplified, to summarize with the valve battery 4 to form an assembly. For example, the starting device 3 as a start module in addition to the valve modules formed by the multi-way valves 2 or installed in the terminal plate 5. If necessary, the electronic control device 11 may be a member of said assembly.

Claims (19)

Method for starting up an electrofluidic system (1) containing a multiple arrangement indirectly electrically actuable multiway valves (2), in whose normal operating state at the electrically actuable pilot stages (7) of the multiway valves (2) a fluid pilot pressure and at the main stages actuatable by the pilot stages (7) (6) the multi-way valves (2) a fluidic operating pressure is applied, characterized in that the operating pressure source (13) supplying the operating pressure to the main stages (6) only after the pilot stages (7) switching the main stages ( 6) has ensured that the switching control pilot pressure has built up and at the pilot stages (7) abut the initial switching positions of the main stages (6) determining electrical control signals. Method according to Claim 1, characterized in that at an initialization time, a pilot pressure source (13) supplying the pilot pressure is applied to the pilot stages (7) and the operating pressure source (13) delivering its operating pressure is applied to the main stages (6) only after the pilot pressure has been applied the pilot stages (7) has reached the switching pilot pressure A method according to claim 2, characterized in that one of the pilot stages (7) simultaneously with the pilot pressure source which applies the initial switching positions of the main stages (6) predetermining electrical control signals. Method according to one of Claims 1 to 3, characterized in that one and the same pressure source (13) is used both as operating pressure source and as supply pressure source. Starting device for the commissioning of a multiple arrangement indirectly electrically actuated multi-way valves (2) containing electro-fluidic system (1), the multi-way valves (2) fed in the normal operating state with a fluidic operating pressure main stage (6) and at least one with a fluidic pilot pressure fed and actuated by electrical control signals Pilot control stage (7), characterized by an on the one hand to a pilot pressure source (13) and on the other hand to the pilot stages (7) of the multi-way valves (2) connectable or connected pilot pressure feed channel (23), in whose course a fluid connection to the pilot pressure source (13) optionally shut-off or releasing first valve means (26) is switched on, further by an on one hand to an operating pressure source (13) and on the other hand to the main stages (6) of the multi-way valves (2) connectable or connected operating pressure feed channel (12), in the course of which the fluid connection to the operating pressure source (13) selectively shut off or releasing second valve means (27) is turned on, and by a with or after switching the first valve means (26) in the release position activatable time delay element (34), the time-delayed switching until then causes the shut-off position engaging second valve means (27) in the release position. Starting device according to claim 5, characterized in that the time delay caused by the time delay element (34) time delay is variably adjustable. Starting device according to claim 5 or 6, characterized in that the pilot pressure feed channel (23) and the operating pressure supply channel (12) to a common pressure source (13) are connected or connected. Starting device according to Claim 7, characterized by a fluid inlet (24) which can be connected or connected to a pressure source (13) and to which both the pilot pressure feed channel (23) and the operating pressure feed channel (12) are connected on the inlet side. Starting device according to one of claims 5 to 8, characterized by an embodiment as a structural unit with at least one with the pilot pressure supply channel (23) and the operating pressure feed channel (12) connected to the fluid inlet (24), with a pilot pressure feed channel (23) belonging Pilot pressure fluid outlet (48) and an operating pressure fluid outlet (49) associated with the operating pressure feed passage (12). Starting device according to one of claims 5 to 9, characterized in that the time delay element (34) is an electrical time delay element. Starting device according to claim 10, characterized in that the electrical time delay element (34) is activated by an electrical initialization signal generated in connection with the electrically induced switching over of the first valve device (26) to the release position, and is designed to respond to receipt the initialization signal subsequent period a time-delayed output electrical switching signal to the electrically operable second valve means (27) and cause their switching from the shut-off position to the release position. Starting device according to claim 10 or 11, characterized in that the second valve means (27) of the indirectly electrically actuated type. Starting device according to one of claims 5 to 9, characterized in that the time delay element (34) is a fluidic time delay element. Starting device according to claim 13, characterized in that the second valve device (27) is designed for switching by means of a predetermined switching pressure having fluidic switching signal, wherein the time delay element (34) from a switching of the first valve means (26) in the release position gradually with pressure medium contains filled storage volume (43) from which the switching signal is tapped. Starting device according to claim 14, characterized in that the filling rate of the storage volume (43) is predetermined by an upstream and expediently adjustable throttle device (45). Starting device according to claim 14 or 15, characterized in that the storage volume (43) on the inlet side to the downstream of the first valve means (26) lying channel portion (23a) of the pilot pressure supply channel (23) is connected, such that the filling process of the storage volume automatically with the switching of the first valve means (26) in the release position begins. Electrofluidic system, comprising a multiple arrangement of indirectly electrically actuable multi-way valves (2) and a starting device (3) according to one of claims 5 to 16. Electrofluidic system according to claim 17, characterized by a multi-way valves (2) containing valve battery (4), which is combined with the starting device (3) to form an assembly. Electrofluidic system according to claim 18, characterized in that the valve battery (4) has a connection plate (5) which is equipped both with the multi-way valves (2) and with the starting device (3).

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