RU154862U1 - LIQUID COOLED INTERNAL COMBUSTION ENGINE - Google Patents

Abstract

1. A liquid-cooled internal combustion engine comprising at least one cylinder head (2) and one cylinder block (3), wherein at least one cylinder head (2) is provided with at least one built-in cooling jacket, said the first cooling jacket comprises on the inlet side a first inlet (4a) for supplying refrigerant and on the outlet side a first outlet (5a) for releasing refrigerant, and the cylinder block (3) is provided with at least one built-in cooling a jacket, wherein said cooling jacket associated with the unit comprises on the inlet side a second inlet opening for supplying refrigerant and on an outlet side, a second outlet provided for discharging refrigerant, and the outlet openings (5a) are made at least with the possibility of forming a cooling circuit connecting to the supply holes (4a) through the modular unit (1), while the modular unit (1) is located adjacent to the short end face of at least one cylinder head (2) and the soda neighs the pump (9) for supplying refrigerant, the first point (4a ′) of the inlet connection is for the first inlet (4a), the second point (4b ′) of the inlet connection is for the second inlet, the first point (5a ′) of the outlet connection is for the first outlet (5a), the second outlet connection point (5b ′) is for the second outlet and the first outlet connection point (5a ′) is made at least with the possibility of connecting to the second inlet point (4b ′)

Description

FIELD OF TECHNOLOGY TO WHICH A USEFUL MODEL IS

The invention relates to a liquid-cooled internal combustion engine comprising at least one cylinder head and one cylinder block, in which

at least one cylinder head is provided with at least one integrated cooling jacket, said first cooling jacket has, on an inlet side, a first supply opening for supplying refrigerant and, on an outlet side, a first discharge opening for releasing refrigerant, and

the cylinder block is made with at least one integrated cooling jacket, said cooling jacket associated with the block has, on the inlet side, a second inlet for supplying refrigerant and, on the outlet side, a second outlet provided for discharging refrigerant.

BACKGROUND

The internal combustion engine of the foregoing type is used as a drive unit of a motor vehicle. Within the context of this utility model, the expression “internal combustion engine” encompasses Otto cycle engines, diesel engines, and hybrid internal combustion engines that use a hybrid combustion process and hybrid drives that include not only an internal combustion engine, but also an electric machine that can be connected in terms of drive to an internal combustion engine, and which receives power from the engine, or which, as a switchable auxiliary drive, additionally provides power.

In general, it is possible that the cooling system of an internal combustion engine takes the form of an air type cooling system or a liquid type cooling system. Due to the higher heat capacity of liquids, it is possible that significantly larger amounts of heat are dissipated using a liquid type cooling system than is possible using an air type cooling system. Therefore, internal combustion engines according to the prior art as never before are often made with a liquid-type cooling system, since the thermal load of the engines is constantly increasing. Another reason for this is that internal combustion engines are more and more pressurized and, in order to obtain the densest packaging possible, an increasing number of components are built into the cylinder head or cylinder block, resulting in an increase in the thermal load of the engines , that is, internal combustion engines. The exhaust manifold is more and more integrated in the cylinder head to be included in the cooling system provided in the cylinder head, and so that the manifold does not need to be made of highly thermally loaded materials that are expensive.

The formation of a liquid-type cooling system makes it necessary for the cylinder head to be formed with at least one cooling jacket, that is, it necessitates the provision of channels for the refrigerant that pass the refrigerant through the cylinder head. At least one cooling jacket is supplied with refrigerant on the inlet side through a supply opening, the refrigerant of which, after flowing through the cylinder head, leaves the cooling jacket on the exhaust side through the outlet. Heat does not first need to be conducted to the surface of the cylinder head to dissipate, as is the case in an air-type cooling system, but rather it is discharged into the refrigerant already inside the cylinder head. Here, the refrigerant is supplied by means of a pump located in the cooling circuit so that said refrigerant circulates. The heat that is released into the refrigerant is thereby released from the inside of the cylinder head through the outlet and is again released from the refrigerant outside the cylinder head, for example by means of a heat exchanger and / or in some other way.

Like the cylinder head, the cylinder block can also be made with one or more cooling jackets. The cylinder head, however, is a stronger thermally loaded component, since, in contrast to the cylinder block, the head is equipped with exhaust ducts and the walls of the combustion chambers that are built into the head are exposed to hot exhaust gases longer than the cylinder bodies provided in cylinder block. Moreover, the cylinder head has a lower mass of components than the block.

As a refrigerant, a water-glycol mixture is usually used, provided with additives. As for other coolants, water has the advantage that it is non-toxic, easily accessible and cheap, and also has a very high heat capacity, for this reason the water is suitable for the generation and dissipation of very large amounts of heat, which is considered mainly useful.

For the formation of a cooling circuit (see, for example, WO 2003/048539, published 12.06.2003, IPC F01P 11/00, F01P 5/10, F01P 7/16), the outlet openings on which the refrigerant exits the cooling jackets are connected or at least connected to the inlet openings of the inlet side, which serve to supply refrigerant to the cooling jackets, for this purpose, a line or multiple lines shall be provided.

These lines do not have to be lines in the physical sense, but rather, can be embedded in sections of at least one cylinder head or cylinder block. However, in general, the lines go outside the cylinder head or cylinder block, and an extended system of lines is usually implemented using pieces of hoses and tubes formed, in particular, not only to connect the outlet openings of the outlet side to the inlet openings of the inlet side, but also so that a wide variety of components are connected to the cooling circuit, for example, a refrigerant pump, a heat exchanger or radiator, an oil cooler, a charge air cooler, a device ystvo for cooling the exhaust gases that must be recycled, the passenger compartment heating system and / or the like. An example of such a line is a recycle line in which a heat exchanger is located in order to remove heat from the refrigerant.

The mains, in particular, the lengths of hoses and tubes of the mains system, which is formed, significantly increase the required space of the cooling system and, thus, the drive unit in the engine compartment. It would be beneficial that the number of lines and the total length of the lines be reduced, and that as many lines as possible be integrated as much as possible into other components, thereby reducing the required space of the line system, reducing the number of components and reducing assembly costs. Weight and costs, such as logistics and assembly costs, could also be reduced. In particular, the integration of highways into other components eliminates the need for assembly and connecting elements and eliminates the risk of leakage.

ESSENCE OF A USEFUL MODEL

Based on the prior art described above, the objective of this utility model is to provide a liquid-cooled internal combustion engine according to the restrictive part of paragraph 1 of the utility model formula, which is optimized for the cooling system manifolds, in particular, is compact, and guarantees the smallest possible compact layout of the drive unit as a whole in the engine compartment of the vehicle.

This problem is solved by means of a liquid-cooled internal combustion engine comprising at least one cylinder head and one cylinder block, in which

at least one cylinder head is provided with at least one built-in cooling jacket, said first cooling jacket comprises, on an inlet side, a first refrigerant supply port and, on an outlet side, a first refrigerant outlet, and

the cylinder block is provided with at least one integrated cooling jacket, said cooling jacket associated with the block has, on the inlet side, a second inlet for supplying refrigerant and, on the outlet side, a second outlet provided for discharging refrigerant,

wherein

for the formation of a cooling circuit, the outlet openings are adapted to be connected to the inlet openings through a modular assembly located adjacent to the short short end side of at least one cylinder head and comprises a pump for supplying refrigerant, a first inlet connection point is for a first inlet connection, a second inlet point the connection is for the second inlet, the first outlet point is for the first outlet, and the second the outlet outlet connection point is for the second outlet connection, and the first outlet connection point is at least adapted to be connected to the second inlet connection point.

According to a utility model, the internal combustion engine has an assembly that serves to connect the exhaust openings to the supply openings, and which simplifies the assembly of the internal combustion engine, in particular due to the fact that, by means of a prefabricated preassembled assembly, the cooling circuit can be formed in a simplified manner and faster.

Numerous sections of lines are at least partially integrated into the assembly, for example, a line that leads from at least one integrated cooling jacket of the cylinder head to a pump, or a line that leads into the second supply opening of at least one cooling jacket which is integrated in a cylinder head, and / or a line that leads from the second outlet opening of the cooling jacket connected to the block to the pump.

According to a utility model, the assembly has numerous connection points, each of which is intended for, that is, highlighted beneath, and connected to the supply openings and exhaust openings of the cooling jackets. As will be described in more detail below, numerous useful embodiments of an internal combustion engine are characterized in that the connections of the assembly, and thus of the pump, with the holes are formed, that is, realized solely through the connection points, if appropriate, using intermediate elements, such as sealing elements, but without the use of pieces of hoses, tubes or the like. Thus, the assembly process is greatly simplified, since, during the installation of the assembly on the internal combustion engine, a cooling circuit is simultaneously formed.

The utility model approach has numerous advantages. Firstly, the assembly steps are eliminated to form a cooling circuit, and the connecting elements are also eliminated, as a result of which, production costs are reduced. With the exception of the connecting elements, the need to provide sufficient space for assembly tools is also eliminated. The tight arrangement of the drive unit due to the compact design of the internal combustion engine is thereby made possible.

Secondly, the throughput of the refrigerant through the cylinder head and cylinder block can be controlled by only one adjustment element, since all of the connected lines lead through the node in a spatially adjacent configuration.

Due to the fact that the first outlet connection point is connected to or connected to the second inlet connection point, preferably inside the assembly or through a section of the line integrated into the assembly, a through-flow configuration of the serial connection of the cooling jackets is realized, moreover, the flow first passes through the cooling jacket cylinder head, and subsequently, through the cooling jacket of the cylinder block. Thus, the refrigerant that has already been preheated in the cylinder head flows through the cylinder block, that is, the refrigerant that is heated in the cylinder head is recycled to the cylinder block.

By means of the internal combustion engine according to the utility model, the problem on which the utility model is based is solved, that is, an internal combustion engine is provided which is compact and which guarantees the most compact arrangement of the drive unit as a whole in the engine compartment of the vehicle.

Additional useful embodiments of an internal combustion engine according to the dependent claims of the utility model will be described in more detail below.

Useful embodiments of a liquid-cooled internal combustion engine in which the assembly is attached to at least one cylinder head.

The specified embodiment provides the opportunity to shorten the length of the line, which leads into the inlet of the cooling jacket, which is built into the cylinder head, and the line, which is attached to the outlet of the specified cooling jacket. Similar advantages are obtained if the cooling jacket, which is integrated in the cylinder block, is supplied with refrigerant through the cylinder head.

Useful embodiments of a liquid-cooled internal combustion engine in which the assembly comprises a housing structure. The housing structure preferably has a monolithic shape, preferably in the form of an integral molded part, and can serve, firstly, as a supporting structure for elements and components, and, secondly, for fastening the assembly itself, that is, for fastening to the engine internal combustion or to the cylinder head.

Useful embodiments of a liquid-cooled internal combustion engine in which a first outlet is formed in at least one cylinder head. This contributes to shortening the lengths of the lines, in particular if the assembly is attached to at least one cylinder head.

Useful embodiments of a liquid-cooled internal combustion engine in which a first outlet connection point is connected directly to the first outlet. This embodiment is useful since additional elements, such as pieces of hoses and tubes, are not required to create a connection between the assembly, and thus the pump and the outlet opening.

Useful embodiments of a liquid-cooled internal combustion engine in which a second inlet and / or a second outlet are formed in at least one cylinder head. In this case, the cooling shirts of the head of the liquid-cooled cylinder block and the liquid-cooled cylinder block are connected to each other. Refrigerant exchange takes place between the cylinder head and the cylinder block. The cooling jacket integrated in the cylinder block is supplied with refrigerant through the cylinder head.

The head of the block and the block, during assembly, are attached to each other on their end faces for assembly, thereby forming cylinders, that is, the combustion chambers of the internal combustion engine. The second inlet and / or second outlet are advantageously located in the cylinder head adjacent to the end face of the assembly to facilitate the supply of refrigerant to the block through the cylinder head, and to shorten the respective lines.

The internal combustion engine assembly according to a utility model is particularly suitable for configuring an end-to-end flow of a series connection of cooling jackets, the flow first passing through the cooling jacket of the cylinder head, and subsequently through the cooling jacket of the cylinder block. This approach is characterized by short lines in the cooling circuit.

Useful embodiments of a liquid-cooled internal combustion engine in which a second inlet connection point is connected directly to the second inlet port.

Similarly, embodiments of a liquid-cooled internal combustion engine are useful in which a second outlet connection point is connected directly to the second outlet.

The two embodiments above provide the same advantages as described with the direct connection of the first outlet connection point to the first outlet. Direct connection of the connection point to the connected, i.e. designated hole, is beneficial because it has the effect that additional elements, such as hose and pipe sections, are not required to create a connection between the assembly, and thus the pump and the outlet.

Useful embodiments of a liquid-cooled internal combustion engine in which a first exhaust connection point, a second exhaust connection point and / or a second supply connection point are made in the form of cylindrical connectors and in one piece with the body structure of the assembly.

If the assembly comprises a housing structure, embodiments are useful in which the refrigerant pump is located on that side of the assembly that faces from the cylinder head and the refrigerant pump is attached to the housing structure of the assembly. Such arrangement and mounting of the pump mainly have the effect that, on the side facing the cylinder head, sufficient space remained free for the connection points to form lines between the specified connection points and cooling jackets and to install fasteners for attaching the assembly to the cylinder head .

Useful embodiments of a liquid-cooled internal combustion engine in which the refrigerant pump is configured with a drive mechanism that serves as a drive and which is located on that side of the assembly that faces the cylinder head.

Traction drive motors have proven to be useful for driving auxiliary components of an internal combustion engine, for example, for driving an oil pump, a refrigerant pump, an alternator, and the like. As for the drive, belt drives or chain drives can be used that generalize the various drives, that is, are included in the category under the term “traction drive”.

The drive of the traction mechanism is designed to transmit high torque from the inlet shaft of the drive, for example, a crankshaft or camshaft, to auxiliary nodes, in this case, a pump, with the lowest possible energy loss and with the lowest possible maintenance and maintenance costs when re-operating a lift. In order to maintain the drive mechanism under tension and thus guarantee as much as possible the most reliable and wear-free action of the drive, it is preferable that the tension device be provided at a suitable location on the drive.

The layout of the drive of the traction mechanism on the side of the assembly that faces the cylinder head serves to protect the drive of the traction mechanism from foreign bodies. The housing structure is preferably provided with a recess for receiving the drive of the traction mechanism, which recess protects the drive of the traction mechanism in the manner of a chain drive casing and ensures proper operation.

However, liquid-cooled internal combustion engine embodiments in which the refrigerant pump is electrically driven may also be useful.

Embodiments of an internal combustion engine are useful in which the refrigerant pump is variable in a controlled manner. In such a case, it is further possible that the flow rate of the refrigerant is influenced or controlled by the supply pressure.

Useful embodiments of a liquid-cooled internal combustion engine in which the assembly comprises a vacuum pump. A vacuum pump, for example, can be used to assist in steering or can be used in conjunction with a brake booster.

In this regard, embodiments of a liquid-cooled internal combustion engine are useful in which the housing structure of the assembly at least together forms a housing for the vacuum pump. The housing segment for the vacuum pump serves to additionally give rigidity to the housing structure of the assembly, while the integral shape of the housing construction eliminates the need for, that is, makes it possible to do without, separately attaching the vacuum pump to the assembly. Advantages are also obtained regarding the assembly process.

Useful embodiments of a liquid-cooled internal combustion engine in which a camshaft which is mounted in the cylinder head serves as a drive for a vacuum pump. A camshaft, which is generally driven by a crankshaft, and which is usually mounted in the upper position in the cylinder head, is advantageously suitable for driving a vacuum pump, simply because of its spatial proximity, and a direct mechanical connection to the camshaft should preferably be ensured. shaft to the shaft of the vacuum pump, for example, the connection of the shafts with direct closure, indirect closure or forming a single Loe. Swivel shafting is a possible embodiment.

Useful embodiments of a liquid-cooled internal combustion engine in which the drive of the traction mechanism comprises an inlet wheel of the drive which is driven by a vacuum pump and which is connected via a traction mechanism to the exhaust wheel of the drive located on the pump shaft for the cooling system. Here, in the drive of the vacuum pump, a wheel is provided which is driven by a vacuum pump and which serves, in the drive of the traction mechanism, as an intake wheel of the drive for the refrigerant pump.

Useful embodiments of a liquid-cooled internal combustion engine in which the housing structure comprises an additional tubular-shaped housing segment. Like the casing, already described above, for a vacuum pump, any additional segment of the casing serves to further stiffen the casing structure of the assembly. A fuel pump or camshaft adjuster, for example, can be received or housed in a tubular-shaped housing segment. The integral formation of a housing segment with a housing design eliminates the need for a separate fastening of the corresponding component and reduces the consumption of material, and thus also reduces weight and costs.

Useful embodiments of a liquid-cooled internal combustion engine in which the housing structure has at least one first recess for receiving at least one proportional valve.

The background of this embodiment is that the purpose and purpose of the liquid type cooling system is not to remove the greatest possible amount of heat from the internal combustion engine in all operating conditions. In fact, a demand-dependent control of the liquid-type cooling system is required, which, in addition to the full load, also introduces an adjustment to the operating modes of the internal combustion engine, in which it is more beneficial that less heat or as little heat as possible is removed from the internal combustion engine.

To reduce friction losses and thus fuel consumption of the internal combustion engine, it may be advisable to quickly warm up the engine oil, in particular after a cold start. Rapid heating of the engine oil during the warm-up phase of the internal combustion engine provides a correspondingly rapid decrease in oil viscosity and thus friction and friction losses, in particular in bearings that are supplied with oil, for example, crankshaft bearings.

Rapid heating of engine oil in order to reduce friction losses can mainly be stimulated by quickly warming up the internal combustion engine itself, which, in turn, is maintained, that is, boosted by the smallest possible amount of heat removed from the internal combustion engine during heating phases. In this regard, the warm-up phase of the internal combustion engine after a cold start is an example of an operation mode in which it is beneficial that as little heat as possible, preferably no heat, is removed from the internal combustion engine.

In an internal combustion engine that has a liquid-cooled cylinder head as well as a liquid-cooled cylinder block, like the internal combustion engine that is the subject of this utility model, it is useful that the flow of refrigerant through the cylinder head and through the cylinder block is independently adjustable from each other, in particular, since the two components are thermally loaded to different degrees and exhibit different behavior during heating. It would be useful if the flow of refrigerant through the cylinder head and the flow of refrigerant through the cylinder block at the beginning of the warm-up phase so that the refrigerant does not leak, but rather remains stationary in the mains and in the cooling jacket of the cylinder head and / or cylinder block, thereby the heating of the refrigerant and the heating of the internal combustion engine would be accelerated, the heating of the engine oil would be accelerated, and the reduction of friction losses would be supported.

The discussed embodiment has a proportional valve for controlling a liquid type cooling system, said proportional valve being located on the outlet side or on the inlet side and controlling both the flow of refrigerant through the cylinder head of the engine and also the flow of refrigerant through the cylinder block. The demand-oriented control of the liquid-type cooling system and the demand-oriented cooling of the internal combustion engine are carried out by means of a single control element. Thus, costs, weight and space required for the control are reduced. The number of components is reduced, as a result of which the costs of material support and assembly costs are fundamentally reduced. The adjusting element, for example, may be in the form of a rotating drum with holes located on the surface of the shell.

A proportional valve, for example, which is actively controlled by the engine controller, basically enables three-dimensional control of the valve and, accordingly, also the temperature of the refrigerant, which adapts to the existing load condition of the internal combustion engine, for example, a higher refrigerant temperature for more lower loads than high loads. By means of a proportional valve, which is controlled by the engine controller, the refrigerant flows through the cylinder head and cylinder block, and thus the amount of heat removed, can be controlled, that is, adjusted according to need.

The proportional valve or associated control element may adopt different operating positions, for example, an operating position suitable for the warm-up phase of the internal combustion engine, in which the refrigerant flows through the cylinder head, but not through the cylinder block. A thermally particularly highly loaded cylinder head, in this case, undergoes a flow of refrigerant and cools. Preferably, it is possible that the through flow rate and thus the amount of heat removed from the cylinder head are set by adjusting the adjusting element within the operating position.

By moving the proportional valve to a different operating position, the cylinder block is then further opened to the refrigerant, and the refrigerant flows through the cylinder head and cylinder block. It is preferably possible that the through-flow rate and thus the amount of heat removed from the cylinder block are set by adjusting the adjusting element within the operating position.

The two above-mentioned operating positions are preferably supplemented by an additional position, in particular a rest position, in which the cooling of the cylinder head is also taken out of operation, that is, the flow of refrigerant through the cylinder head is completely blocked.

The proportional valve is preferably controlled depending on the specific temperature Tcyl.-head of the cylinder head and / or the temperature Tcyl.-block of the cylinder block. Thus, it is possible for the cylinder head as well as the cylinder block to be thermostatically controlled or cooled according to need.

The proportional valve optimizes the control of cooling and, in its essence, makes it possible to manipulate the control of the thermal regime of the internal combustion engine in the heating phase and the control of the thermal regime of the heated internal combustion engine.

In order to guarantee functional cooling even in the event of a proportional valve failure, it is useful that a self-regulating valve depending on the temperature be provided to control the liquid type cooling system, such a valve is also usually referred to as a thermostat-controlled valve. The thermostat-controlled valve of this type has a temperature-responsive element that is exposed to refrigerant, and the line that runs through the valve is closed or opens — to a greater or lesser extent — depending on the temperature of the refrigerant in the element. A thermostat-controlled valve provides refrigerant flow and thus provides sufficient cooling, even in the event of a defective proportional valve.

Therefore, embodiments of a liquid-cooled internal combustion engine are useful in which the housing structure has at least one second recess for receiving at least one thermostat-controlled valve.

Embodiments of a liquid-cooled internal combustion engine in which at least one cylinder head has two integrated and interconnected cooling jackets may be useful.

BRIEF DESCRIPTION OF THE DRAWINGS

A utility model will be described in more detail below based on an exemplary embodiment according to FIGS. 1a and 1b. In the figures:

FIG. 1 schematically shows a general view of the rear side of a modular assembly according to a first embodiment of an internal combustion engine, and

FIG. 2 schematically shows a general view of the front side of the modular assembly illustrated in FIG. 1, in the installed position.

DESCRIPTION OF PREFERRED EMBODIMENTS FOR USING THE USEFUL MODEL

FIG. 1 schematically shows a general view of the rear side 1a of the modular assembly 1 according to the first embodiment of the internal combustion engine, the rear side facing the cylinder head 2 when the assembly 1 is in the installed position (see also FIG. 2). FIG. 2 shows a view of the front side lb of the modular assembly 1 illustrated in FIG. 1, in the installed position.

The modular unit 1 is part of the cooling circuit of the internal combustion engine and serves to connect the outlet jacks 5a of the cooling jackets, which are integrated in the cylinder head 2 and cylinder block 3, to the supply holes 4a, for this purpose, the node 1 is located adjacent to the short end side of the head 2 cylinder block (also see Fig. 2).

The illustrated assembly 1 comprises a housing structure 7 and, on its rear side 1a, a first outlet connection point 5a ′, a second inlet connection point 4b ′ and a second outlet connection point 5b ′, wherein connection points 4b ′, 5a ′, 5b ′ are formed in the form of cylindrical connectors and in one piece with the housing structure 7 of the node 1.

The refrigerant leaving the cooling jacket of the cylinder head 2 through the first outlet 5a enters the assembly 1 through the first outlet connection point 5a ′ and, subsequently, flows inside the assembly 1, through the integrated line segment, to the second supply connection point 4b ′, from which refrigerant is supplied — in this case, through the cylinder head 2 to the cooling jacket of the cylinder block 3. After flowing through the cooling jacket of the cylinder block 3, the refrigerant again enters the assembly 1 through the second outlet connection point 5b ′. Therefore, the flow passes sequentially through the cooling jacket of the cylinder head 2 and the cooling jacket of the cylinder block 3, moreover, the flow first passes through the cooling jacket of the cylinder head 2 and, subsequently, through the cooling jacket of the cylinder block 3.

The assembly 1 also comprises a vacuum pump 10, the shaft 10b of which is driven (not illustrated) by a camshaft, which is mounted in the cylinder head 2. The housing structure 7 of the assembly 1 together forms a part of the housing 10a of the vacuum pump 10. The fact that the housing 10a is integrally formed with the housing structure 7 eliminates the need for a separate mount.

As regards the refrigerant supply, a refrigerant pump 9 is provided which is located on the front side 1b of the assembly 1, that is, on that side of the assembly 1, which is facing away from the cylinder head 2, and the refrigerant pump is fixed by means of its housing 9a to the housing structure 7 of the assembly one.

The refrigerant pump 9 is driven by a drive unit 11 of the traction mechanism, which is located on that side of the assembly 1 that faces the cylinder head 2, that is, on the rear side 1a. The drive mechanism 11 of the traction mechanism includes an intake wheel 11a of the drive, which is driven by a vacuum pump 10, and which is located on the shaft 10b of the vacuum pump 10, the specified intake wheel of the drive is connected through the traction mechanism 11c, in this case, the belt 11c, to the exhaust wheel 11b of the drive located on the shaft 9b of the refrigerant pump 9. The housing structure 7 has a box recess 7d for receiving the drive unit 11 of the traction mechanism.

Moreover, the housing structure 7 comprises a segment 7 with a tubular-shaped housing, which serves to further stiffen the housing structure 7, and which can accommodate a fuel pump or camshaft adjustment mechanism.

In addition, the housing structure 7 has a first recess 7a for receiving a proportional valve 8a and a second recess 7b for receiving a thermostat-controlled valve 8b. Two valves 8a, 8b serve to control the flow of refrigerant. For example, it is possible for the refrigerant to be supplied directly to the refrigerant pump 9, bypassing the heat exchanger, through the shunt line 12. The illustration also shows part of the refrigerant line 13 from the heat exchanger.

As can be seen in FIG. 2, the assembly 1, in the installed position, is attached to the cylinder head 2. The assembly 1 has, on its front side 1b, a first inlet connection point 4a ′, which is located on the refrigerant pump 9, and which is connected through a pipe section to the first inlet 4a of the cooling jacket which is integrated in the cylinder head 2.

LIST OF REFERENCE POSITIONS

1 - Modular assembly

1a - Back side

1b - Front side

2 - cylinder head

3 - cylinder block

4a - First inlet

4a ′ - First point of inlet connection

4b ′ - Second point of inlet connection

5a - First outlet

5a ′ —First outlet connection point

5b ′ - Second outlet connection point

6 - The front side of the node

7 - Case design

7a - First notch

7b - Second notch

7c - Tubular body segment

7d - Box recess

8a - Proportional valve

8b - Thermostat-controlled valve

9 - Refrigerant pump

9a - Housing for the refrigerant pump

9b - Refrigerant pump shaft

10 - Vacuum pump

10a - Housing for the vacuum pump

10b - Shaft of the vacuum pump

11 - Traction drive

11a - Drive inlet wheel

11b - Drive exhaust wheel

11c - Traction Belt

12 - Shunt line

13 - Heat exchanger refrigerant pipe

Claims (18)

1. A liquid-cooled internal combustion engine comprising at least one cylinder head (2) and one cylinder block (3), in which at least one cylinder head (2) is provided with at least one built-in cooling jacket, said first cooling jacket comprising, on an inlet side, a first inlet (4a) for supplying refrigerant and on an outlet side a first outlet (5a) for releasing refrigerant and the cylinder block (3) is provided with at least one built-in cooling jacket, wherein said cooling jacket associated with the block comprises on the inlet side a second supply opening for supplying refrigerant and the outlet side, a second outlet provided for discharging the refrigerant, and for forming a cooling circuit, the outlet openings (5a) are made at least with the possibility of connection to the supply openings (4a) through the modular unit (1), while the modular unit (1) is located adjacent to the short end side of at least one cylinder head (2) and contains a pump (9) for supplying refrigerant, the first point (4a ′) of the inlet connection is for the first inlet (4a), the second point (4 b ′) the inlet connection is for the second inlet, the first point (5a ′) of the outlet connection is for the first outlet (5a), the second point (5b ′) of the outlet connection is for the second outlet and the first point (5a ′) of the outlet made at least with the possibility of connection to the second point (4b ′) of the supply connection. 2. A liquid-cooled internal combustion engine according to claim 1, wherein the assembly (1) is attached to at least one cylinder head (2). 3. A liquid-cooled internal combustion engine according to claim 1, wherein the assembly (1) comprises a housing structure (7). 4. A liquid-cooled internal combustion engine according to claim 1, wherein the first outlet (5a) is formed in at least one cylinder head (2). 5. The liquid-cooled internal combustion engine according to claim 1, wherein the first point (5a ′) of the outlet connection is connected directly to the first outlet (5a). 6. The liquid-cooled internal combustion engine according to claim 1, wherein the second inlet and / or second outlet is formed in at least one cylinder head (2). 7. The liquid-cooled internal combustion engine according to claim 1, wherein the second point (4b ′) of the inlet connection is connected directly to the second inlet. 8. The liquid-cooled internal combustion engine according to claim 1, wherein the second point (5b ′) of the exhaust connection is connected directly to the second exhaust opening. 9. The liquid-cooled internal combustion engine according to claim 1, wherein the first point (5a ′) of the exhaust connection, the second point (5b ′) of the exhaust connection and / or the second point (4b ′) of the supply connection are made in the form of cylindrical connectors and integral with the body structure (7) of the assembly (1). 10. A liquid-cooled internal combustion engine according to claim 3, wherein the refrigerant pump (9) is located on the side of the assembly (1) that is facing away from the cylinder head (2), said refrigerant pump being attached to the housing structure (7) node (1). 11. A liquid-cooled internal combustion engine according to claim 1, wherein the refrigerant pump (9) is provided with a drive (11) of the traction mechanism, which serves as a drive and which is located on the side of the assembly (1) that faces the head (2) ) cylinder block. 12. A liquid-cooled internal combustion engine according to claim 10, wherein the assembly (1) comprises a vacuum pump (10). 13. A liquid-cooled internal combustion engine according to claim 12, wherein the housing structure (7) of the assembly (1) at least together forms a housing (10a) for the vacuum pump (10). 14. A liquid-cooled internal combustion engine according to claim 12, wherein the camshaft mounted in the cylinder head (2) serves as a drive for the vacuum pump (10). 15. The liquid-cooled internal combustion engine according to claim 12, wherein the traction drive (11) comprises an drive inlet wheel (11a) driven by a vacuum pump (10), and which is connected to the exhaust wheel via a traction mechanism (11c) (11b) a drive located on the shaft (9b) of the refrigerant pump (9). 16. A liquid-cooled internal combustion engine according to claim 10 or 12, wherein the housing structure (7) comprises an additional tubular-shaped housing segment (7c). 17. A liquid-cooled internal combustion engine according to claim 10 or 12, wherein the body structure (7) has at least one first recess (7a) for receiving at least one proportional valve (8a). 18. A liquid-cooled internal combustion engine according to claim 10 or 12, wherein the body structure (7) has at least one second recess (7b) for receiving at least one thermostat-controlled valve (8b).

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