INTERNAL COMBUSTION ENGINE INCLUDING AT LEAST ONE ELECTRIC MOTOR

Abstract

An internal combustion engine, including at least one electric motor (8, 13, 16, 20) situated on the crankcase of the internal combustion engine, at least one control unit (1) for controlling the internal combustion engine and/or the electric motor and at least one high voltage converter (15).

Claims

1-11. (canceled)

12. An internal combustion engine comprising: a crankcase; at least one electric motor situated on the crankcase; at least one control unit for controlling at least one of the internal combustion engine and the electric motor; and at least one high voltage converter.

13. The internal combustion engine as recited in claim 12 wherein the electric motor is configured as a starter.

14. The internal combustion engine as recited in claim 12 wherein the electric motor is configured as a generator.

15. The internal combustion engine as recited in claim 12 further comprising a cylinder head cover and a common rail situated in the cylinder head cover.

16. The internal combustion engine as recited in claim 12 further comprising a cylinder head cover and a cable harness is situated in the cylinder head cover.

17. The internal combustion engine as recited in claim 16 wherein the control unit is configured for connecting to the cable harness.

18. The internal combustion engine as recited in claim 17 wherein the control unit is configured for connecting to the cable harness without cables.

19. The internal combustion engine as recited in claim 12 further comprising a cylinder head cover, the control unit being situated on or at the cylinder head cover.

20. The internal combustion engine as recited in claim 12 further comprising an engine oil cooler situated on a side of the crankcase approximately at a height of and spatially behind the electric motor.

21. The internal combustion engine as recited in claim 20 wherein the engine oil cooler is situated on an exhaust gas side of the crankcase.

22. The internal combustion engine as recited in claim 21 further comprising an exhaust gas recirculation module situated on the exhaust gas side of the crankcase above the engine oil cooler.

23. The internal combustion engine as recited in claim 12 further comprising a cylinder head and a high-pressure pump situated on a side of the cylinder head.

24. The internal combustion engine as recited in claim 23 wherein the high-pressure pump situated on a service side of the cylinder head.

25. The internal combustion engine as recited in claim 24 further comprising a cylinder head cover and a common rail situated in the cylinder head cover, the high-pressure pump being configured for connecting without cables to the common rail.

26. The internal combustion engine as recited in claim 12 further comprising at least one hydraulic pump situated below the electric motor, the electric motor being situated on a side of the crankcase, the hydraulic pump and the electric motor being situated on a frontal gear train via a gear drive.

27. The internal combustion engine as recited in claim 12 wherein the at least one electric motor is a plurality of electric motors including a first electric motor on one front side of the crankcase and a second electric motor on the other front side of the crankcase.

28. The internal combustion engine as recited in claim 27 wherein the plurality of electric motors include a third electric motor on a service side of the crankcase.

29. The internal combustion engine as recited in claim 28 wherein the plurality of electric motors include a fourth electric motor on an exhaust gas side of the crankcase.

30. The internal combustion engine as recited in claim 27 wherein the high voltage converter is situated above the first electric motor.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is explained in greater detail below on the basis of one exemplary embodiment.

[0019] FIG. 1 shows the service side of the internal combustion engine;

[0020] FIG. 3 shows the individual installation space areas;

[0021] FIG. 4 shows a top view of the cylinder head.

DETAILED DESCRIPTION

[0022] The basic idea is that the entire system is to be modified with respect to the assembly arrangement and layout of the components in such a way that the complexity of the basic engine in the design decreases and may simultaneously be utilized for the purpose of easier integration due to the degrees of freedom obtained and new reinforced interfaces. Three installation space areas may thus be generally illustrated for accommodating the particular hybrid systems (cf., for example, FIG. 3): [0023] (A) Area for flywheel & SAE [0024] (B) Area for service side & PTO [0025] (C) Area for fan & belt drive

[0026] The present invention relates to the entire coordinated and intermeshing arrangement of the system components. In this advantageous specific embodiment, including a clear separation of functions, all key assemblies are segmented and recombined in such a way that a very high functional density may be achieved, making optimum and compact use of the installation space. An overhead control unit 1 is illustrated in FIGS. 1 and 2, including a direct cable channel, which is situated either in parallel to the cylinder head cover or within the cylinder head cover. There is a cable channel variant with or without dust and water protection. Cylinder head 2 is provided with a cross-flow design and includes common rail injectors 25 having high-pressure lines and dust-protected sheathing of various components of the injection system. Moreover, cylinder head 2 includes sensors, interfaces and connecting points for exhaust gas aftertreatment (EGA system). The customer tubing connection (CTC) includes an optional overhead fan bearing, engine step protection and an engine transport holder as well as an overhead high-pressure pump 3, which is/are connected directly on the cylinder head with our without acoustic protection. Crankcase 4 is designed with or without the function of splitting the coolant circuit, the so-called split cooling system. The closed oil pan contour without interruption of the seal results in a reinforced engine and a reinforced gear train. The EGR recirculation system is situated on the exhaust gas side of the internal combustion engine. Interfaces exist for attachment components and the engine mounting system. Filter module 5 for fuel and oil is detached from the oil cooling function. Power takeoff (PTO) module (B) 6 is mounted directly on crankcase 4. Adapter transmission 7 is, for example, a spur gear unit for faster transmissionwith or without an elastic clutch. The internal combustion engine includes a dust-protected receptacle for the electric machine (high speed system). The internal combustion engine may be designed with or without a PTO (A) interface. The internal combustion engine furthermore includes a direct cableless oil supply via plug-in elements. Electric machine 8 (high-speed system) is provided with a dust-protected design for the heavy-duty area. Supporting bracket 9, including tolerance compensation, is connected directly to the crankcase. Oil pan 10 is optimized with respect to acoustic performance and designed as a sheet-metal, cast or plastic part. The exhaust gas line and exhaust gas turbocharger 11 may be implemented in various attachment positions. EGR module system 14 may be implemented with or without an integrated positioning unit and be fully integrated into the crankcase; it is connected directly and flow-optimized to the cooling circuit system, excluding a holding bracket and excluding coolant lines, and to the exhaust gas recirculation system in the crankcase, which is scalable in the range of functions, depending on the emissions level. Electric machine 12 (mild hybrid system) is provided with a dust-protected design for the heavy-duty area. Adapter unit 13 (SAE area) for direct connection of the electric machine is situated in a centered manner on the crankcase. High-voltage converter 15 is attached, softly mounted on the front plate. Starter 16 may be designed with or without dust protection or with or without water protection. Engine oil cooler 17 is fully integrated into the crankcase and connected directly and flow-optimized to the cooling circuit system. Front plate 18 is directly connected and situated in a centered manner on the crankcase. Adapter unit 19 is situated in a centered manner on the crankcase in the area of the fan & belt drive for direct connection of electric machine 20. In the design for the heavy duty area, electric machine 20 and adapter unit 19 are situated in a dust-protected manner.

[0027] FIG. 1 shows control unit 1 on cylinder head cover 23 (FIG. 4), which is connected to cable harness channel 22 (FIG. 4) situated in parallel to cylinder head cover 23 (FIG. 4). On cylinder head 2, diesel high-pressure pump 3 is connected essentially without cables to common rail 21, which is not visible and is shown in FIG. 4. Filter module 5 is situated on crankcase 4 on the service side. So-called power takeoff (PTO) 6 is situated above adapter transmission 7 below diesel high pressure pump 3 on the service side. Electric motor 8 is situated on adapter transmission 7, adapter transmission 7 being situated on the frontal gear train. Supporting bracket 9 supports electric motor 8 and abuts hydraulic pump 24. Oil pan 10 is situated below crankcase 4.

[0028] FIG. 2 shows the engine from FIG. 1 from its exhaust gas side; the exhaust gas line and exhaust gas turbocharger (EGT) 11 are situated at approximately the height of cylinder head cover 23 or cylinder head 2. Electric motor 12 is situated on a front face of the internal combustion engine with the aid of an SAE adapter unit 13. EGR module 14 is situated below the exhaust gas line and exhaust gas turbocharger (EGT) 11 and above electric motor/starter 16, and engine oil cooler 17 at approximately the height of cylinder head 2. High voltage converter 15 is situated on the other front face of the internal combustion engine, above adapter unit 19 and electric motor 20 and connected by a cable to electric motor 20. A front plate 18 is situated on the other front face of the crankcase.

[0029] The engine from FIG. 1 and FIG. 2 is illustrated in FIG. 3, divided into three areas A, B and C, area A representing the one front face and area C representing the other front face of the engine or internal combustion engine. Area B essentially includes the service side area of the internal combustion engine around electric motor 8.

[0030] The arrangement of diesel high pressure pump 3, which is connected essentially without cables to common rail 21, is illustrated in FIG. 4.

[0031] The opened cylinder head rests on crankcase 4 and shows cable harness 22, which is situated below cylinder head cover 23. Below cylinder head cover 23, injectors 25 project into the cylinder head to supply the internal combustion engine with fuel, the injectors being supplied with fuel by common rail 21.

LIST OF REFERENCE NUMERALS

[0032] 1 control unit [0033] 2 cylinder head [0034] 3 diesel high pressure pump [0035] 4 crankcase [0036] 5 filter module [0037] 6 power takeoff (PTO) [0038] 7 adapter transmission [0039] 8 electric motor [0040] 9 supporting bracket [0041] 10 oil pan [0042] 11 exhaust gas line and exhaust gas turbocharger (EGT) [0043] 12 electric motor [0044] 13 SAE adapter unit [0045] 14 EGR module [0046] 15 high voltage converter [0047] 16 electric motor/starter [0048] 17 engine oil cooler [0049] 18 front plate [0050] 19 adapter unit [0051] 20 electric motor [0052] 21 common rail [0053] 22 cable harness [0054] 23 cylinder head cover [0055] 24 hydraulic pump [0056] 25 injector