TRANSMISSION FOR AN INTERNAL COMBUSTION ENGINE

Abstract

Transmission (1) for an internal combustion engine for driving both a first auxiliary unit (101) and a second auxiliary unit (102), the transmission comprising: a first auxiliary unit gear (8) for driving the first auxiliary unit (101), a second auxiliary unit gear (9) for driving the second auxiliary unit (102), and a first intermediate gear (6) to be driven by a crankshaft gear (5) of an engine (100); wherein the first auxiliary unit gear (8) is meshed with the first intermediate gear (6);and wherein the first auxiliary unit gear (8) and the second auxiliary unit gear (9) are positioned such that it is possible to place a second intermediate gear (7) between the first auxiliary unit gear (8) and the second auxiliary unit gear (9) to connect the first auxiliary unit gear (8) to the second auxiliary unit gear (9), and to place the second intermediate gear (7) between the second auxiliary unit gear (9) and the first intermediate gear (6) to connect the second auxiliary unit gear (9) and the first intermediate gear (6).

Description

Technical field

[0001] The present disclosure relates to a transmission for an internal combustion engine for driving both a first auxiliary unit and a second auxiliary unit. The present disclosure further relates to an engine comprising a transmission. background

[0002] Auxiliary units are devices connected to the engine to operate it. These auxiliary units can include fuel pumps, coolant pumps, and so on. Fuel pumps are used to pressurize fuel so that it can be injected into an engine cylinder for combustion. Coolant pumps can be used to transport cold coolant to the engine and / or to transport heated coolant from the engine, for example, to a heat exchanger.

[0003] These auxiliary units can be driven by the engine's crankshaft. The engine's crankshaft can be connected to the input shafts of the auxiliary units via connecting elements such as gears and belts to transmit torque from the crankshaft to the input shafts of the auxiliary units.

[0004] EP 2 357 338 B1 discloses a diesel engine mounted laterally on a vehicle body. Attached to the diesel engine are an oil pump and a fuel pump, which are driven by the engine's crankshaft via a gearbox. To drive the oil pump, a first intermediate gear meshes with a crankshaft gear supported by the crankshaft, the first intermediate gear meshing with a first balance shaft gear, and the first balance shaft gear meshing with an oil pump gear supported by a drive shaft of the oil pump.

[0005] A fuel pump drive shaft carries a fuel pump gear that meshes with a second intermediate gear. This second intermediate gear meshes with the first intermediate gear, which is driven by the crankshaft.

[0006] However, EP 2 357 338 does not take into account a situation in which the gearbox must be able to adapt to a different direction of rotation of the crankshaft.

[0007] The present disclosure relates, at least in part, to improving or overcoming one or more aspects of systems according to the prior art. Summary of Revelation

[0008] In one aspect of the present disclosure, a transmission is provided to drive both a first auxiliary unit and a second auxiliary unit.

[0009] The transmission comprises a first gear to drive the first auxiliary unit, a second gear to drive the second auxiliary unit, and a third gear to be driven by a crankshaft of an engine. The first gear meshes with the third gear.

[0010] The first gear and the second gear are positioned in such a way that it is possible to place a fourth gear between the first gear and the second gear to connect the first gear to the second gear, as well as to place the fourth gear between the second gear and the third gear to connect the second gear and the third gear.

[0011] Further features and aspects of this revelation will become clear from the following description and the accompanying drawings. Brief description of the drawings

[0012] The accompanying drawings, which are included herein and form part of the description, illustrate exemplary embodiments of the revelation and, together with the description, serve to explain the principles of the revelation. The drawings illustrate:

[0013] Fig. 1. an engine;

[0014] Fig. 2 an exemplary transmission according to an embodiment of the present disclosure;

[0015] Fig. 3 the gearbox of Fig. 1 in a second configuration;

[0016] Fig. 4 a further exemplary transmission according to an embodiment of the present disclosure; and

[0017] Fig. 5 the gearbox of Fig. 3 in a second configuration. Detailed description

[0018] Fig. 1 reveals an engine 100 , which has a crankshaft 2 and a crankcase103 includes a crankshaft gear. 5 is connected to the crankshaft 2 connected, so that the crankshaft gear 5 together with the crankshaft 2 rotates. A first additional unit 101 and a second additional unit 102 are located at the front end of the crankcase 103 positioned to pass through the crankshaft 2 to be powered. The additional unit 101 , 102 This could be, for example, a fuel pump, a high-pressure pump, an oil pump, a circulation pump, an alternator, a generator, a compressor, a water pump, etc. The torque of the crankshaft 2 is through a gearbox 1 with the gear 5 and the gears 6 , 7 , 8 and 9 to a drive shaft 3 the first additional unit 101 and a drive shaft 4 the second additional unit 102 transmitted.

[0019] Fig. 2 reveals the gearbox 1 for the transmission of rotational energy from a crankshaft 2 to the drive shaft 3 a first additional unit 101 and to the drive shaft 4 the second additional unit 102 The crankshaft 2 The crankshaft gear 5 The crankshaft gear 5 stands with a first intermediate wheel 6 in gearing. The first intermediate gear 6 stands with the second intermediate wheel 7 and the first auxiliary unit gear 8 in the toothing, which is from the drive shaft 4 the first additional unit 101 is carried. The second intermediate wheel 7 stands with the second additional unit gear 9 in the toothing, which is from the drive shaft 4 the second additional unit 102 is worn.

[0020] The crankshaft gear 5can be mechanically connected to the crankshaft 2 be connected, in particular in a way in which the crankshaft 2 relative to the crankshaft gear 5 cannot rotate. The connection can be made by welding, friction fit, form fit, or one-piece connection.

[0021] The drive shaft 3 the first additional unit 101 and the drive shaft 4 the second additional unit 102 can be mechanically connected to the first auxiliary unit gear 8 and the second auxiliary unit gear 9 be connected in such a way that the drive shaft 3 the first additional unit 101 and / or the drive shaft 4 the second additional unit 102 relative to the first auxiliary unit gear 8 and / or the second auxiliary unit gear 9 cannot turn.

[0022] A pivot axis 10 the drive shaft4 The second additional unit can also control the axis of rotation. 10 of the second auxiliary unit gear 9 be a pivot axis 13 the drive shaft 3 The first additional unit can also have the axis of rotation 13 of the second auxiliary unit gear 8 be a pivot axis 14 the crankshaft 2 can also the axis of rotation 14 of the crankshaft gear 5 be.

[0023] The axes of rotation 10 , 11 , 12 , 13 and 14 can be parallel to each other, and the gears 5 , 6 , 7 , 8 and 9 They can be arranged in the same plane. The gears can be spur gears, internal gears, ring gears, etc.

[0024] The gearbox 1 can a case 15 exhibit that the gearbox 1 can cover the case 15The housing can be at least partially integrated with the engine block. 15 can be a first fixing element 16 include the second intermediate wheel 7 rotatable with the housing 15 to connect in a first position, so that the second intermediate wheel 7 with the additional unit gear 9 and with the first intermediate wheel 6 is in gears. The housing 15 can a second fixing element 17 include the second intermediate wheel 7 rotatable with the housing 15 to connect in a second position, so that the first intermediate wheel 6 with the first additional unit gear 8 and with the second additional unit gear 9 in toothed alignment. The fixing element can be a shaft to which the second intermediate gear is attached. 7 can be positioned.

[0025] According to another embodiment, the first intermediate gear 6 with the crankshaft gear 5 be connected by one or more torque transmission units such as gears, belts, etc. Fig. 3 shows the gearbox 1 from Fig. 1, but the second intermediate wheel 7 removed from the first position and in the second position attached to the second fixing element 17 is positioned to rotate. The second intermediate wheel 7 It is now connected to the first additional unit gear. 8 and the second auxiliary unit gear 9 in gearing and transmits torque from the first auxiliary unit gear 8 to the second auxiliary unit gear 9 In this configuration, the first auxiliary unit gear rotates. 8 and the second auxiliary unit gear 9 in the direction of rotation of the crankshaft gear 5 .

[0026] At least the first intermediate gear 6 , the first auxiliary unit gear 8 , the second intermediate wheel 7 and the second auxiliary unit gear 9 are from the housing 15 enclosed to protect the gearbox 1 to protect against mechanical shocks and to retain lubricant inside the housing. Also the crankshaft gear. 5 can be located inside the casing 15 are located. The casing 15 provides enough space for the second intermediate wheel 7 to selectively move to the first position or the second position.

[0027] Fig. Figure 4 shows an alternative embodiment of the gearbox. 1 The crankshaft gear 5 stands with the first additional unit gear 8 in gearing. The first auxiliary unit gear. 8 stands with the second intermediate wheel 7 in interlocking, which moves into a second position 19is positioned. The second intermediate wheel 7 stands with the second additional unit gear 9 in gearing. The second intermediate gear 7 can be achieved through the second fixing element 17 rotatable with the housing 15 be connected. In this configuration, the first auxiliary unit rotates in a position relative to the crankshaft gear. 5 opposite direction. The second intermediate gear 7 rotates in the same direction as the crankshaft gear 5 , and the second auxiliary unit gear 9 rotates in one direction the crankshaft gear 5 opposite direction.

[0028] Fig. 5 shows the gearbox 1 from Fig. 3 in a second configuration. The second intermediate wheel 7 is in first position 18 arranged, and is in contact with the crankshaft gear 5 and the second auxiliary unit gear 9in gearing. The first auxiliary unit gear. 8 is connected to the crankshaft gear 5 interlocking. Commercial applicability

[0029] To drive a first auxiliary unit, such as a circulation pump, and a second auxiliary unit, such as a high-pressure pump, through the crankshaft 2 To drive, the crankshaft gear 5 as in Fig. 2 shown with the first intermediate gear 6 in gearing. The first intermediate gear 6 rotates in one direction the crankshaft gear 5 opposite direction. The first intermediate gear 6 stands with the second intermediate wheel 7 and the first auxiliary unit gear 8 in gearing. The second intermediate gear 7 and the first auxiliary unit gear 8 rotate in the same direction as the crankshaft gear 5 The second intermediate gear 7 stands with the second additional unit gear9 in gearing, so that the second auxiliary unit gear 9 into one of the crankshaft gears 5 rotates in the opposite direction. When the motor 100 When configured to rotate in the opposite direction to one of the first configurations described above, the crankshaft rotates. 5 also in the opposite direction during operation. To the drive shaft 4 To rotate the second auxiliary unit in the same direction as in the first configuration, the second intermediate gear can be positioned in the second position, so that the second intermediate gear 7 with the first additional unit gear 8 and the second auxiliary unit gear 9 in gear mesh. In this configuration, the second auxiliary unit gear rotates. 9 in the same direction as the crankshaft gear 5Since auxiliary units such as high-pressure pumps may have a preferred direction of rotation, the gearbox may 1 a change in the position of the second intermediate gear 7 from a first position 18 into a second position 19 allow this if the direction of rotation of the motor is changed. QUOTES INCLUDED IN THE DESCRIPTION

[0030] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0031] EP 2357338 B1

[0004] EP 2357338

[0006]

Claims

[1] Gearbox ( 1 ), in order to provide both a first additional unit ( 110 ) as well as a second additional unit ( 102 ) to drive, the transmission comprising: a first additional unit gear ( 8 ), to add the first additional unit ( 101 ) to drive a second auxiliary unit gear ( 9 ), to add the second auxiliary unit ( 102 ) to drive, and a first intermediate gear ( 6 ), which is passed through a crankshaft gear ( 5 ) of an engine ( 100 ) is to be powered; where the first auxiliary unit gear ( 8 ) with the first intermediate gear ( 6 ) is interlocked; and where the first auxiliary unit gear ( 8 ) and the second auxiliary unit gear ( 9 ) are positioned so that it is possible to install a second intermediate wheel ( 7 ) between the first auxiliary unit gear ( 8 ) and the second auxiliary unit gear ( 9) to place the first auxiliary unit gear ( 8 ) with the second auxiliary unit gear ( 9 ) to connect, as well as the second intermediate wheel ( 7 ) between the second auxiliary unit gear ( 9 ) and the first intermediate gear ( 6 ) to position the second auxiliary unit gear ( 9 ) and the first intermediate gear ( 6 to connect. [2] Gearbox ( 1 ) according to claim 1, wherein the first auxiliary unit is a circulation pump. [3] Gearbox ( 1 ) according to one of the preceding claims, wherein the transmission is a housing ( 15 ) includes the first auxiliary unit gear ( 8 ), the second auxiliary unit gear ( 9 ), the first intermediate gear ( 6 ) and a second intermediate gear ( 7 includes. [4] Gearbox ( 1 ) according to claim 3, wherein the housing ( 15 ) a first bracket for holding the second intermediate wheel (7 ) in a first position between the first auxiliary unit gear ( 8 ) and the second auxiliary unit gear ( 9 ), as well as a second bracket for holding the second intermediate wheel ( 7 ) in a second position between the second auxiliary unit gear ( 9 ) and the first intermediate gear ( 6 ) includes. [5] Gearbox ( 1 ) according to one of the preceding claims, wherein the second additional unit ( 102 ) is a high-pressure pump. [6] Gearbox ( 1 ) according to one of the preceding claims, wherein the first intermediate gear ( 6 ) with the crankshaft ( 2 ) connected and around a principal longitudinal axis ( 14 ) the crankshaft ( 2 ) is rotatable. [7] Gearbox ( 1 ) according to one of the preceding claims, wherein the first auxiliary unit gear ( 8 ) with a first additional unit drive shaft ( 3 ) is connected. [8] Gearbox ( 1 ) according to one of the preceding claims, wherein the second auxiliary unit gear ( 9 ) with a second additional unit drive shaft ( 4 ) is connected. [9] Gearbox ( 1 ) according to one of the preceding claims, wherein the first auxiliary unit gear ( 8 ), the second auxiliary unit gear ( 9 ), the first intermediate gear ( 6 ) and the second intermediate gear ( 7 ) are arranged in a common plane. [10] Gearbox ( 1 ) according to any one of the preceding claims, wherein: the first auxiliary unit gear ( 8 ) in a first configuration with the first intermediate wheel ( 6 ) and the second intermediate wheel ( 7 ) is interlocked; and the second auxiliary unit gear ( 9 ) with the first intermediate gear ( 6 ) is in gearing; and the first auxiliary unit gear ( 8) in a second configuration with the first intermediate wheel ( 6 ) is interlocked; and the second intermediate gear ( 7 ) with the second auxiliary unit gear ( 9 ) and the first intermediate gear ( 6 ) is interlocked. [11] Gearbox ( 1 ) according to claim 10, wherein the second intermediate gear ( 7 ) rotatable and removable with the housing ( 15 ) is connected. [12] Motor comprising a gearbox ( 1 ) according to any of the preceding claims.

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