DE102015012835A1 - Internal combustion engine for a motor vehicle, in particular a commercial vehicle - Google Patents

Abstract

The invention relates to an internal combustion engine (10) for a motor vehicle, comprising a cooling circuit (24) through which a cooling medium for cooling the internal combustion engine (10) is arranged with at least one valve device (32) arranged between at least one of the cooling circuits (24) Channel (30) of the cooling circuit (24) fluidly locked closed position and at least one at least one channel (24) releasing open position is adjustable, and with a lubricant flowing through a lubricant circuit (20), wherein in the lubricant circuit (20) one of the lubricant actuatable actuator (54) is arranged, by means of which the valve device (32) is adjustable.

Description

The invention relates to an internal combustion engine for a motor vehicle, in particular a commercial vehicle, according to the preamble of patent claim 1.

Such internal combustion engines for motor vehicles are already well known from the general state of the art and in particular from series production. The internal combustion engine has a cooling circuit, which can be flowed through by a coolant for cooling the internal combustion engine. The coolant is, for example, a coolant, by means of which areas or components of the internal combustion engine are cooled. The internal combustion engine further has at least one valve device arranged in the cooling circuit, which is adjustable between a closed position fluidically blocking at least one channel of the cooling circuit and at least one open position releasing the at least one channel.

The valve device is, for example, a thermostat, by means of which a flow of the coolant to a cooler for cooling the coolant is adjustable. If, for example, the temperature of the coolant is below a predefinable threshold value, the at least one channel is fluidly blocked by means of the valve device, so that the coolant does not flow through the at least one channel and thus not through the cooler. The coolant is thus not cooled by means of the radiator. This is also not necessary because the coolant still has a low temperature. If the temperature exceeds the predefinable threshold, for example, the thermostat opens, whereby the valve device releases the at least one channel. As a result, the coolant may flow through the at least one channel and thus through the radiator so that the coolant is cooled by means of the radiator. Thereby, an excessive temperature rise of the coolant can be prevented, so that thermal damage can be avoided.

By means of this need-based release and blocking of the at least one channel, for example, rapid heating of the internal combustion engine during a warm-up phase after a cold start can be realized.

The internal combustion engine also has a lubricant circuit through which a lubricant can flow. The lubricant is for example lubricating oil or oil, with which components, in particular relatively movable components, the internal combustion engine can be supplied. As a result, the components can be cooled and / or lubricated by means of the lubricant in order to avoid, for example, thermal damage and to keep the internal friction of the internal combustion engine low.

Furthermore, the DE 10 2013 217 125 A1 an engine lubrication control system including a motor, an oil pump driven by the engine, and an oil circuit extending downstream of the oil pump.

In addition, the WO 02/34359 A1 to take an aggregate module of an internal combustion engine as known, wherein the aggregate module as the first unit comprises a device for separating impurities from the lubricating oil of the internal combustion engine.

In addition, from the DE 10 2008 032 494 A1 an oil-coolant module is known, which has a housing. On the housing, a first receiving space for an oil filter and a second receiving space for an oil-water heat exchanger are formed. It is envisaged that in the housing an oil thermostatic receptacle is formed.

Object of the present invention is to develop an internal combustion engine of the type mentioned in such a way that a particularly needs-based adjustment of the valve device can be realized in a particularly simple manner.

This object is achieved by an internal combustion engine having the features of patent claim 1. Advantageous embodiments with expedient developments of the invention are specified in the remaining claims.

In order to develop an internal combustion engine specified in the preamble of claim 1 type such that a particularly needs-based adjustment of the valve device can be realized in a particularly simple manner, it is inventively provided that in the lubricant circuit an actuatable by the lubricant actuator is arranged, by means of which the valve device is adjustable. This means that the lubricant, in particular its pressure, is used to adjust the valve device via the actuator, that is to move from the closed position into the open position and / or from the open position into the closed position. As a result, for example, the temperature of the coolant can be adjusted regulated, without cost, space and weight-intensive electrical actuators are required. Due to the need-based adjustment of Temperature of the coolant, the fuel consumption of the internal combustion engine can be kept particularly low.

Further advantages, features and details of the invention will become apparent from the following description of a preferred embodiment and from the drawing. The features and feature combinations mentioned above in the description as well as the features and feature combinations mentioned below in the description of the figures and / or shown alone in the figures can be used not only in the respectively specified combination but also in other combinations or in isolation, without the scope of To leave invention.

The drawing shows in:

1 a schematic representation of an internal combustion engine for a motor vehicle, with a cooling circuit, a lubricant circuit, arranged in the cooling circuit valve means and arranged in the lubricant circuit and actuated by a lubricant actuator, by means of which the valve device is adjustable; and

2 partially a schematic sectional view of the cooling circuit and the actuator.

In the figures, the same or functionally identical elements are provided with the same reference numerals.

1 shows in a schematic representation of a whole 10 Designated internal combustion engine of a motor vehicle, in particular a commercial vehicle. The internal combustion engine 10 is designed as a reciprocating internal combustion engine and includes a cylinder housing 12 , by which at least one combustion chamber in the form of a cylinder 14 the internal combustion engine 10 is formed. The internal combustion engine 10 also includes a in 1 unrecognizable crankcase, which, for example, a separate from the cylinder housing 12 trained and with the cylinder housing 12 connected housing part is. Alternatively, it is conceivable that the crankcase integral with the cylinder housing 12 is trained. The internal combustion engine 10 further comprises an output shaft in the form of a crankshaft, which is rotatably mounted on the crankcase about an axis of rotation relative to the crankcase. In the cylinder 14 is a piston of the internal combustion engine 10 taken translationally movable, wherein the piston is coupled via a connecting rod articulated to the crankshaft. As a result, the translational movements of the piston are converted into a rotational movement of the crankshaft about its axis of rotation.

The crankshaft is mounted, for example, at respective, successively arranged in the axial direction of the crankshaft or successive bearing points on the crankcase, these bearings are also referred to as the main bearing. Of these main camps is in 1 one with 16 identified main bearing recognizable.

The internal combustion engine 10 further comprises at least one oil spray nozzle associated with the piston 18 , which is also referred to as a piston nozzle. The oil spray nozzle 18 is in a permeable by a lubricant and as a whole with 20 designated lubricant circuit of the internal combustion engine 10 arranged, wherein the lubricant is a lubricating oil, which is also referred to as oil. About the lubricant circuit 20 becomes the oil spray nozzle 18 supplied with the oil, so that in the cylinder 14 arranged piston, in particular its piston crown and / or piston skirt, by means of the oil spray nozzle 18 is sprayed with oil. As a result, the piston is cooled and / or lubricated. The internal combustion engine 10 includes other components 22 , which in the lubricant circuit 20 arranged and therefore on the lubricant circuit 20 be supplied with the oil. Also the main camp 16 is above the lubricant circuit 20 be supplied with oil, so that, for example, relatively movable components of the internal combustion engine 10 can be supplied with the oil. As a result, these components are lubricated and / or cooled, so that the internal friction of the internal combustion engine 10 can be kept low.

The internal combustion engine 10 also has an in 2 partially recognizable and as a whole with 24 designated cooling circuit, which is flowed through by a coolant. This coolant is a cooling fluid, which is also referred to as water or cooling water. By means of the cooling liquid or the coolant, the internal combustion engine 10 , in particular components of the internal combustion engine 10 , Cooled, for example, by a heat transfer from the components to the coolant. For example, the cylinder housing 12 a arranged in the cooling circuit and consequently by the coolant can flow through the cooling jacket, which is also referred to as a water jacket. This allows the cylinder housing 12 due to a heat transfer from the cylinder housing 12 be cooled to the coolant.

In 2 it can be seen that the cooling circuit 24 a plurality of channels 26 . 28 and 30 has, which can be flowed through by the coolant. In the channel 26 For example, a pump for conveying the coolant is arranged, said pump for conveying the coolant as well Water pump is called. In the channel 30 For example, a radiator for cooling the coolant is arranged. The cooler is a heat exchanger, which can be flowed through by the coolant. As a result of a heat transfer from the coolant flowing through the radiator to the radiator and air flowing from the radiator to the radiator, the coolant, after it has cooled by the cylinder housing 12 was heated, cooled. The channel 28 is, for example, a bypass channel, which is also referred to as a bypass channel. The bypass channel is used to bypass the radiator. In other words, the channel 30 and thus the one in the channel 30 arranged cooler over the channel 28 to bypass at least a portion of the coolant, in particular the entire coolant. That the channel 28 flowing coolant thus does not flow through the channel 30 and thus not through the radiator, so that's the channel 28 flowing coolant is not cooled by the radiator.

In the cooling circuit 24 is also a valve device in the form of a whole with 32 designated thermostat arranged, the thermostat 32 Also referred to as coolant thermostat. The thermostat 32 is between at least one channel 30 fluidly obstructing and in 2 shown closed position and at least one channel 30 releasable open position adjustable. In the closed position of the thermostat 32 Thus, the coolant can not pass through the channel 30 and thus do not flow through the radiator, the thermostat 32 in the closed position the channel 28 releases so that the entire coolant bypasses the radiator and therefore is not cooled by the radiator. In the open position, the thermostat gives 32 the channel 30 free, so that the coolant can flow through the radiator and is thus cooled by means of the radiator.

The thermostat includes 32 a valve element 34 , Which in the present case about a pivot axis 36 is pivotable between the closed position and the open position. This is in 2 by a double arrow 38 illustrated. If cooling of the coolant caused by the radiator is not desired or required, then the thermostat becomes 32 moved to a closed position. Should the coolant through the radiator 30 be cooled, then the thermostat 32 opened, that is moved in the open position. This can be done by means of the thermostat 32 the temperature of the coolant adjusted as needed, in particular regulated to be set.

The internal combustion engine 10 comprises a first module part in the form of an oil-coolant module 40 which is independent of the cylinder housing 12 can be produced or pre-assembled and with the internal combustion engine 10 or the cylinder housing 12 connected, in particular on an outer side of the internal combustion engine 10 , is flanged. The oil-coolant module 40 is in the lubricant circuit 20 arranged and therefore flowed through by the oil. For this purpose, the oil-coolant module 40 a plurality of channels 42a -C on which of the oil can be flowed through. The oil-coolant module 40 also has a filter 44 to filter the oil and a cooler 46 to cool the oil, with the radiator 46 Also referred to as oil cooler. Out 1 is recognizable that the radiator 46 and the filter 44 can be flowed through by the oil. This is the cooler 46 designed as a heat exchanger and can be flowed through by the oil and the coolant. Thus, the cooler 46 also arranged in the cooling circuit. By means of the cooler 46 The oil can be cooled as a heat transfer from the cooler 46 flowing oil over the radiator 46 to the radiator 46 can be done by flowing coolant. The channels 42a For example, -c are through a housing of the oil-coolant module 40 formed, with the filter 44 and the radiator 46 arranged on the housing and are received in particular in the housing. Thus, the oil-coolant module 40 be handled as an independent module part and mounted in a particularly simple manner.

The internal combustion engine 10 comprises a second module part in the form of a control module 48 which is preferably all in the lubricant circuit 20 arranged valves for adjusting a flow of the lubricant (oil) comprises. For this purpose, the control module 48 a plurality of in 1 unrecognizable channels, which, for example, by a housing of the control module 48 are formed. Here are the valves of the control module 48 held on the housing and in particular at least partially received in the housing. Like the oil-coolant module 40 is the control module 48 an independent module part, which is independent of other components, in particular module parts, the internal combustion engine 10 manufactured or pre-assembled and in preassembled state with other components or module parts of the internal combustion engine 10 can be connected. Out 1 is recognizable that the control module 48 with the oil-coolant module 40 connected is. This connection takes place, for example, via an in 1 not shown interface, wherein, for example, at least a portion of the channels of the control module 48 with the channels 42a -C of the oil-coolant module 40 is fluidically connected. As a result, for example, oil from the control module 48 to the oil-coolant module 40 overflow and / or vice versa. As a result of this fluidic connection of the module parts (oil-coolant module 40 and control module 48 ) can by means of the control module 48 also the flow of the oil through the channels 42a C or through the lubricant circuit 20 be adjusted in total.

By a directional arrow 50 is in 1 illustrates that in the control module 48 absorbed oil from the control module 48 in an oil pan of the internal combustion engine 10 can be drained.

In particular, it is possible, a pressure and / or a temperature of the oil by means of the control module 48 adjust by adjusting the flow of the oil. This setting, in particular regulation or regulated setting, takes place here, for example, electronically by means of an electronic computing device in the form of a control device 52 , By means of which, for example, respective valves of the internal combustion engine 10 , in particular the control module 48 , be operated. This actuation of the valves can take place, for example, as a function of a pressure and / or a temperature of the lubricant.

To now in a particularly simple manner a particularly needs-based adjustment of the thermostat 32 to realize is in the lubricant circuit 20 an actuatable by the lubricant (oil) actuator 54 arranged, by means of which the thermostat 32 is adjustable. The present is the actor 54 an actuator module, which is independent of other components and module parts of the internal combustion engine 10 preassembled and preassembled state with other components or module parts of the internal combustion engine 10 can be connected. Furthermore, the actuator 54 in this case, part of the control module 48 and can be connected to it as needed, in particular to the control module 48 flanged or omitted. Furthermore, it is conceivable, the actuator 54 with the oil-coolant module 40 to connect, in particular to the oil-coolant module 40 flanging. In the present case, the actuator represents 54 an extension of the control module 48 represents.

Out 1 it is recognizable that the actor 54 a plurality of channels through which the oil can flow 56a Having at least one of the channels of the control module 48 are fluidically connected. This allows oil from the control module 48 to the actor 54 overflow or vice versa.

The actor 54 includes a housing 58 through which, for example, the channels 56a -C are formed. Furthermore, the actuator comprises 54 a piston 60 which is in the housing 58 is recorded translationally movable. The housing 58 forms a working space 62 in which the piston 60 is included. By the piston 60 is the workspace 62 in two working chambers 64 and 66 of the actor 54 divided. About the channel 56a can add oil to the working chamber 64 be introduced, taking over the channel 56b Oil in the working chamber 66 can be introduced.

The actor 54 further includes one with the piston 60 connected and thus with the piston 60 with movable piston rod 68 , where in 1 by a directional arrow 70 a direction of movement of the piston 60 and thus the piston rod 68 is illustrated, wherein the piston 60 and the piston rod 68 are movable in this direction of movement. For example, over the channel 56a Oil in the working chamber 64 initiated, so the piston 60 and thus the piston rod 68 related to the image plane of 1 moved to the left. If, however, oil over the channel 56b in the working chamber 66 initiated, so the piston 60 and thus the piston rod 68 related to the image plane of 1 moved to the right. The oil becomes the channels 56a and 56b over the channels 56c fed.

To move the piston as needed 60 and the piston rod 68 , that is to demand actuation of the actuator 54 and thus to adjust the demand of the thermostat 32 are in the channels 56a C a valve element 72 of the actor 54 arranged. By means of the valve element 72 is a respective flow of the oil into the working chambers 64 and 66 adjustable, so the piston 62 can be moved to the left or right as needed.

Out 1 it can be seen that the valve element 72 for example, electrically with the control unit 52 is connected, so that the valve element 72 from the controller 52 can be controlled and thereby actuated. This makes it possible, for example, the actuator 54 by means of the control unit 52 in response to a temperature and / or a pressure of the lubricant and / or the coolant to operate.

Furthermore, the internal combustion engine comprises 10 a pump 80 for pumping the oil, the pump 80 in a channel through which the oil can flow 82 is arranged. The pump 80 is also called oil pump. About the channel 82 can the oil by means of the pump 80 to the or in the oil-coolant module 40 be encouraged. Overall, it can be seen that the actor 54 a hydraulic actuator or a hydraulically actuated actuator, wherein for actuating the actuator 54 that the lubricant circuit 20 flowing oil is used as the hydraulic medium.

Out 2 is particularly clear that the thermostat 32 , in particular the valve element 34 , about the piston rod 68 between the Closed position and the open position is adjustable or movable. For this purpose, the valve element 34 via respective, for example articulated lever elements 74 and 76 with the piston rod 68 connected. Like a directional arrow 78 can be illustrated by translational movement of the piston 60 and the piston rod 68 for example, the lever element 64 be pivoted, which in turn the valve element 34 around the pivot axis 36 can be pivoted.

Overall, it is possible by means of the module parts to adjust the pressure and / or temperature of the oil and the temperature of the coolant as needed, in particular to regulate, thereby reducing the fuel consumption of the internal combustion engine 10 to keep low. The adjustment of the pressure and the temperature of the oil via the said valves of the control module 48 , The temperature of the coolant is adjusted via the thermostat 32 , which, for example, to the oil-coolant module 40 is flanged. In the internal combustion engine 10 the pressure of the oil is used to the thermostat 32 to adjust. This pressure is in the control module 48 before or is at the control module 48 available, since this is a central part for the adjustment or control of the oil. By using the oil or its pressure to operate the thermostat 32 or the actor 54 Additional electrical actuators are not required and not provided. In addition, the thermostat needs 32 not as an electrical thermostat, in particular electrically controlled thermostat, are formed, so that the cost of the thermostat 32 and thus the internal combustion engine 10 can be kept low overall.

By combining the valves used to adjust the flow of the oil into the control module 48 and preferably the integration of the actuator 54 in the control module 48 is a centralization of the control of the cooling circuit 24 and the lubricant circuit 20 feasible, so this regulation present in the control module 48 is centralized. By using the module parts, a particularly high modularity can be realized, so that the module parts, for example, on an outside of the internal combustion engine 10 can be flanged. This also allows a particularly advantageous accessibility for cable harnesses, especially in case of service, realize. Furthermore, the module parts can be used for different internal combustion engines, so that cost savings can be realized due to economies of scale. There are also other additions to the control module 48 for the lubricant circuit 20 with auxiliary functions and / or sensors for the cooling circuit 24 conceivable.

For example, a pressure and / or a temperature of the lubricant and / or the coolant by means of at least one sensor of the control module 48 be recorded. Furthermore, it is conceivable that the control module 48 for a filling of the lubricant circuit 20 and / or to use for a throttling of the lubricant. Furthermore, it is conceivable to limit the pressure in the control module 48 to integrate in order to avoid overpressure. Overall is off 1 and 2 recognizable in the control module 48 a pressure and temperature control is integrated for both the lubricant and the coolant. Thus, fuel economy can be realized with an optimal cost / benefit ratio. In addition, for example, by the modularity in a particularly simple manner different construction variants can be realized. Furthermore, a particularly high flexibility of the control can be realized.

It is possible to realize several, different stages of the control of the internal combustion engine, in particular with regard to the lubricant and the coolant, by means of the control module 48 , For example, it is possible to realize a minimum control as well as to represent a mechanical control and an electronic map control. Because a high number of functions in the control module 48 integrated, other components such as pumps, module parts and the thermostat 32 be simplified. In addition, the need for external power and external energy, especially electrical energy, can be kept low, since the already existing pressure and thus an already absorbed in the oil energy can be used to the thermostat 32 to press. In addition, the control can be realized independently of lubricant and refrigeration cycle components and corresponding suppliers.

LIST OF REFERENCE NUMBERS

10

Internal combustion engine

12

cylinder housing

14

cylinder

16

main bearing

18

Oil spray nozzle

20

Lubricant circuit

22

module

24

Cooling circuit

26

channel

28

channel

28

channel

30

channel

32

thermostat

34

valve element

36

swivel axis

38

double arrow

40

Oil-coolant module

42a-c

channel

44

filter

46

cooler

48

control module

50

arrow

52

control unit

54

actuator

56a-c

channel

58

casing

60

piston

62

working space

64

working chamber

66

working chamber

68

piston rod

70

arrow

72

valve element

74

lever member

76

lever member

78

arrow

80

pump

82

channel

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102013217125 A1 [0006]
• WO 02/34359 A1 [0007]
• DE 102008032494 A1 [0008]

Claims (5)

Internal combustion engine ( 10 ) for a motor vehicle, with one of a coolant for cooling the internal combustion engine ( 10 ) throughflowable cooling circuit ( 24 ), with at least one in the cooling circuit ( 24 ) arranged valve device ( 32 ), which between a at least one channel ( 30 ) of the cooling circuit ( 24 ) fluidly obstruct closed position and at least one of the at least one channel ( 24 ) releasing open position is adjustable, and with a permeable by a lubricant lubricant circuit ( 20 ), characterized in that in the lubricant circuit ( 20 ) an actuatable by the lubricant actuator ( 54 ) is arranged, by means of which the valve device ( 32 ) is adjustable. Internal combustion engine ( 10 ) according to claim 1, characterized in that the valve device ( 32 ) by means of the actuator ( 54 ) is adjustable from the closed position to the open position. Internal combustion engine ( 10 ) according to claim 1 or 2, characterized in that the valve device ( 32 ) by means of the actuator ( 54 ) is adjustable from the open position to the closed position. Internal combustion engine ( 10 ) according to one of the preceding claims, characterized in that the actuator ( 54 ) a housing ( 58 ), one in the housing ( 58 ) and by means of the lubricant relative to the housing ( 58 ) translationally movable piston ( 60 ) and one with the piston ( 60 ) and mitbewegbaren piston rod ( 68 ), via which the valve device ( 32 ) is adjustable. Internal combustion engine ( 10 ) according to one of the preceding claims, characterized in that in the at least one channel ( 30 ) is arranged through which a coolant can flow through the radiator for cooling the coolant.

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