INTERNAL COMBUSTION ENGINE

By implementing specific ignition sequences and bank angles with a symmetrical crankshaft design and torsional vibration dampers, the internal combustion engines with twenty cylinders in a V-construction achieve reduced torsional vibrations and improved efficiency.

DE102025101760A1Inactive Publication Date: 2025-04-03FEV GROUP GMBH
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Patent Information

Application Number
DE102025101760
Authority / Receiving Office
DE · DE
Patent Type
Applications
Current Assignee / Owner
Filing Date
2025-01-20
Publication Date
2025-04-03
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

Existing internal combustion engines with twenty cylinders in a V-construction face challenges in optimizing ignition sequences and bank angles to minimize torsional vibrations and improve operational efficiency.

Method used

The engines employ specific ignition sequences and bank angles, combined with a symmetrical crankshaft design and torsional vibration dampers, to reduce torsional vibrations and enhance operational efficiency.

Benefits of technology

The proposed design effectively reduces torsional vibrations and enhances the operational efficiency of four-stroke engines with twenty cylinders in a V-construction.

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Abstract

Internal combustion engine, wherein the internal combustion engine is a four-stroke V-configuration internal combustion engine with twenty cylinders arranged in two cylinder banks enclosing a bank angle, where, during operation of the internal combustion engine, one of the following firing sequences is executed, with the numbering of the cylinders according to DIN 73021, for a direction of rotation of the internal combustion engine, viewed from the free end, clockwise: ia) 1-17-8-11-9-13-5-19-7-16-10-14-3-20-2-18-6-12-4-15 ib) 1-17-8-11-9-13-5-19-7-15-10-14-3-20-2-18-6-12-4-16 or for a direction of rotation of the internal combustion engine, viewed from the free end, counterclockwise: ia)* 1-15-4-12-6-18-2-20-3-14-10-16-7-19-5-13-9-11-8-17 ib)* 1-16-4-12-6-18-2-20-3-14-10-15-7-19-5-13-9-11-8-17.
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Description

[0001] The invention relates to an internal combustion engine, wherein the internal combustion engine is a four-stroke internal combustion engine in V-construction with twenty cylinders arranged in a row in two cylinder banks enclosing a bank angle, wherein during operation of the internal combustion engine one of the following firing sequences is carried out, with the numbering of the cylinders according to DIN 73021, for a direction of rotation of the internal combustion engine, viewed from the free end, clockwise: ia) 1-17-8-11-9-13-5-19-7-16-10-14-3-20-2-18-6-12-4-15 ib) 1-17-8-11-9-13-5-19-7-15-10-14-3-20-2-18-6-12-4-16.

[0002] It can be provided that the bank angle of the internal combustion engine is in particular 90° in the case of the firing order ia) and ib).

[0003] For all firing sequences mentioned in this text, their reverse sequence is also considered to be disclosed, for a direction of rotation of the internal combustion engine, viewed from the free end, counterclockwise.

[0004] The invention relates to a further internal combustion engine, wherein the internal combustion engine is a four-stroke internal combustion engine in V-construction with twenty cylinders arranged in a row in two cylinder banks enclosing a bank angle, wherein during operation of the internal combustion engine one of the following firing sequences is carried out, with the numbering of the cylinders according to DIN 73021, for a direction of rotation of the internal combustion engine, viewed from the free end, clockwise: ii-a) 1-20-3-18-7-14-9-19-6-16-10-11-8-13-4-17-2-12-5-15 ii-c) 1-11-8-18-4-14-9-19-5-15-10-20-3-13-7-17-2-12-6-16 ii-d) 1-16-8-11-4-18-9-14-5-19-10-15-3-20-7-13-2-17-6-12 ii-e) 1-16-8-11-4-18-9-14-6-19-10-15-3-20-7-13-2-17-5-12.

[0005] It can be provided that the bank angle of the internal combustion engine for the case of firing order ii-a) is in particular 50°, wherein the bank angle of the internal combustion engine for the case of firing order ii-c) is in particular 60° and wherein the bank angle of the internal combustion engine for the case of firing orders iid) and ii-e) is in particular 90°.

[0006] The invention relates to a further internal combustion engine, wherein the internal combustion engine is a four-stroke internal combustion engine in V-construction with twenty cylinders arranged in a row in two cylinder banks enclosing a bank angle, wherein during operation of the internal combustion engine one of the following firing sequences is carried out, with the numbering of the cylinders according to DIN 73021, for a direction of rotation of the internal combustion engine, viewed from the free end, clockwise: iii-b) 1-20-3-18-6-15-9-19-7-17-10-11-8-13-5-16-2-12-4-14 iii-c) 1-20-3-18-6-16-9-19-7-17-10-11-8-13-5-15-2-12-4-14 iii-d) 1-20-3-18-6-16-9-19-7-14-10-11-8-13-5-15-2-12-4-17 iii-e) 1-11-3-13-5-16-2-19-4-17-10-20-8-18-6-15-9-12-7-14 iii-f) 1-20-3-18-5-15-9-19-7-17-10-11-8-13-6-16-2-12-4-14 iii-g) 1-20-3-18-5-16-9-19-7-17-10-11-8-13-6-15-2-12-4-14 iii-h) 1-20-3-18-6-15-9-19-7-14-10-11-8-13-5-16-2-12-4-17 iii-i) 1-20-3-18-5-16-9-19-7-14-10-11-8-13-6-15-2-12-4-17 iii-j) 1-11-3-13-5-15-2-19-4-17-10-20-8-18-6-16-9-12-7-14 iii-k) 1-11-3-13-6-16-2-19-4-17-10-20-8-18-5-15-9-12-7-14 iii-m) 1-20-3-13-6-16-2-19-4-14-10-11-8-18-5-15-9-12-7-17 iii-n) 1-20-3-13-5-16-2-19-4-14-10-11-8-18-6-15-9-12-7-17 iii-o) 1-20-3-13-6-15-2-19-4-14-10-11-8-18-5-16-9-12-7-17 iii-p) 1-20-3-13-5-15-2-19-4-14-10-11-8-18-6-16-9-12-7-17 iii-q) 1-11-8-13-6-16-9-19-4-14-10-20-3-18-5-15-2-12-7-17.

[0007] It can be provided that the bank angle of the internal combustion engine is in particular 45° for the case of the firing sequences iii-b) to iii-k), wherein the bank angle of the internal combustion engine is in particular 50° for the case of the firing sequences iii-m) to iii-p) and wherein the bank angle of the internal combustion engine is in particular 60° for the case of the firing sequence iii-q).

[0008] The invention relates to a further internal combustion engine, wherein the internal combustion engine is a four-stroke internal combustion engine in V-construction with twenty cylinders arranged in a row in two cylinder banks enclosing a bank angle, wherein during operation of the internal combustion engine one of the following firing sequences is carried out, with the numbering of the cylinders according to DIN 73021, for a direction of rotation of the internal combustion engine, viewed from the free end, clockwise: iv-a) 1-11-7-17-2-12-8-18-5-15-10-20-4-14-9-19-3-13-6-16 iv-b) 1-16-7-11-2-17-8-12-5-18-10-15-4-20-9-14-3-19-6-13 iv-c) 1-16-7-11-2-17-8-12-6-18-10-15-4-20-9-14-3-19-5-13 iv-d) 1-15-7-11-2-17-8-12-5-18-10-16-4-20-9-14-3-19-6-13.

[0009] It can be provided that the bank angle of the internal combustion engine is in particular 60° in the case of the firing order iv-a) and the bank angle of the internal combustion engine is in particular 90° in the case of the firing orders iv-b) to iv-d).

[0010] The invention relates to a further internal combustion engine, wherein the internal combustion engine is a four-stroke internal combustion engine in V-construction with twenty cylinders arranged in a row in two cylinder banks enclosing a bank angle, wherein during operation of the internal combustion engine one of the following firing sequences is carried out, with the numbering of the cylinders according to DIN 73021, for a direction of rotation of the internal combustion engine, viewed from the free end, clockwise: vb) 1-18-7-11-9-14-5-19-8-16-10-13-4-20-2-17-6-12-3-15 vc) 1-20-4-14-9-12-6-16-3-13-10-11-7-17-2-19-5-15-8-18 vd) 1-20-4-14-9-12-6-15-3-13-10-11-7-17-2-19-5-16-8-18 ve) 1-20-4-14-9-12-5-16-3-13-10-11-7-17-2-19-6-15-8-18 vf) 1-20-4-14-9-12-5-15-3-13-10-11-7-17-2-19-6-16-8-18 vh) 1-11-7-17-2-19-5-15-8-13-10-20-4-14-9-12-6-16-3-18 vj) 1-18-7-11-2-17-6-12-3-16-10-13-4-20-9-14-5-19-8-15 v-l) 1-13-7-11-2-17-5-19-8-16-10-18-4-20-9-14-6-12-3-15 v-m) 1-18-7-11-2-17-6-12-3-16-10-13-4-20-9-14-5-19-8-15 v-n) 1-18-7-11-2-17-6-12-3-15-10-13-4-20-9-14-5-19-8-16 v-o) 1-18-7-11-2-17-6-12-8-15-10-13-4-20-9-14-5-19-3-16 v-p) 1-18-7-11-2-17-5-12-3-15-10-13-4-20-9-14-6-19-8-16 v-q) 1-18-7-11-2-17-6-12-8-15-10-13-4-20-9-14-5-19-3-16 v-r) 1-18-7-11-2-17-6-12-8-16-10-13-4-20-9-14-5-19-3-15 v-s) 1-18-4-11-2-17-6-12-8-15-10-13-7-20-9-14-5-19-3-16 v-t) 1-18-4-11-2-17-5-12-8-15-10-13-7-20-9-14-6-19-3-16 v-u) 1-18-4-11-2-17-6-12-8-16-10-13-7-20-9-14-5-19-3-15.

[0011] It can be provided that the bank angle of the internal combustion engine is in particular 90° in the case of the firing sequences vb) and vj) to vu), wherein the bank angle of the internal combustion engine is in particular 50° in the case of the firing sequences vc) to vf) and wherein the bank angle of the internal combustion engine is in particular 60° in the case of the firing sequence vh).

[0012] The invention relates to a further internal combustion engine, wherein the internal combustion engine is a four-stroke internal combustion engine in V-construction with twenty cylinders arranged in a row in two cylinder banks enclosing a bank angle, wherein during operation of the internal combustion engine one of the following firing sequences is carried out, with the numbering of the cylinders according to DIN 73021, for a direction of rotation of the internal combustion engine, viewed from the free end, clockwise: vi-a) 1-15-4-11-3-14-2-18-5-19-10-16-7-20-8-17-9-13-6-12 vi-b) 1-11-7-17-3-13-9-19-5-15-10-20-4-14-8-18-2-12-6-16.

[0013] It can be provided that the bank angle of the internal combustion engine for the case of the firing order vi-a) is in particular 90° and wherein the bank angle of the internal combustion engine for the case of the firing order vi-b) is in particular 60°.

[0014] The invention relates to a further internal combustion engine, wherein the internal combustion engine is a four-stroke internal combustion engine in V-construction with twenty cylinders arranged in a row in two cylinder banks enclosing a bank angle, wherein during operation of the internal combustion engine one of the following firing sequences is carried out, with the numbering of the cylinders according to DIN 73021, for a direction of rotation of the internal combustion engine, viewed from the free end, clockwise: vii-a) 1-17-6-11-2-15-3-12-7-13-10-14-5-20-9-16-8-19-4-18 vii-b) 1-17-6-11-2-16-3-12-7-13-10-14-5-20-9-15-8-19-4-18 vii-c) 1-14-5-11-2-16-3-19-7-18-10-17-6-20-9-15-8-12-4-13 vii-d) 1-11-6-16-2-12-8-13-7-14-10-20-5-15-9-19-3-18-4-17.

[0015] It can be provided that the bank angle of the internal combustion engine is in particular 90° in the case of the firing sequences vii-a) to vii-c) and the bank angle of the internal combustion engine is in particular 60° in the case of the firing sequence vii-d).

[0016] The invention relates to a further internal combustion engine, wherein the internal combustion engine is a four-stroke internal combustion engine in V-construction with twenty cylinders arranged in a row in two cylinder banks enclosing a bank angle, wherein during operation of the internal combustion engine one of the following firing sequences is carried out, with the numbering of the cylinders according to DIN 73021, for a direction of rotation of the internal combustion engine, viewed from the free end, clockwise: viii-a) 1-13-5-11-2-16-4-19-8-17-10-18-6-20-9-15-7-12-3-14 viii-b) 1-13-6-11-2-16-4-19-8-17-10-18-5-20-9-15-7-12-3-14 viii-c) 1-20-5-15-9-12-7-17-3-13-10-11-6-16-2-19-4-14-8-18 viii-d) 1-11-6-16-2-12-7-17-3-13-10-20-5-15-9-19-4-14-8-18 viii-e) 1-11-6-16-2-19-4-14-8-13-10-20-5-15-9-12-7-17-3-18 viii-f) 1-18-6-11-2-16-7-12-3-17-10-13-5-20-9-15-4-19-8-14 viii-g) 1-18-5-11-2-16-7-12-3-17-10-13-6-20-9-15-4-19-8-14.

[0017] It can be provided that the bank angle of the internal combustion engine is in particular 90° in the case of the firing sequences viii-a), viii-b), viii-f), viii-g), wherein the bank angle of the internal combustion engine is in particular 50° in the case of the firing sequence viii-c) and in particular 60° in the case of the firing sequences viii-d) and viii-e).

[0018] The invention relates to a further internal combustion engine, wherein the internal combustion engine is a four-stroke internal combustion engine in V-construction with twenty cylinders arranged in a row in two cylinder banks enclosing a bank angle, wherein during operation of the internal combustion engine one of the following firing sequences is carried out, with the numbering of the cylinders according to DIN 73021, for a direction of rotation of the internal combustion engine, viewed from the free end, clockwise: ix-a) 1-11-6-16-3-13-9-19-4-14-10-20-5-15-8-18-2-12-7-17 ix-b) 1-17-6-11-3-16-9-13-4-19-10-14-5-20-8-15-2-18-7-12 ix-c) 1-17-6-11-3-15-9-13-4-19-10-14-5-20-8-16-2-18-7-12.

[0019] It can be provided that the bank angle of the internal combustion engine is in particular 60° in the case of the firing order ix-a) and the bank angle of the internal combustion engine is in particular 90° in the case of the firing orders ix-b) and ix-c).

[0020] The invention relates to a further internal combustion engine, wherein the internal combustion engine is a four-stroke internal combustion engine in V-construction with twenty cylinders arranged in a row in two cylinder banks enclosing a bank angle, wherein during operation of the internal combustion engine one of the following firing sequences is carried out, with the numbering of the cylinders according to DIN 73021, for a direction of rotation of the internal combustion engine, viewed from the free end, clockwise: xa) 1-18-6-11-4-16-2-17-8-12-10-13-5-20-7-15-9-14-3-19.

[0021] It can be provided that the bank angle of the internal combustion engine is in particular 90° in the case of the firing order xa).

[0022] The bore diameter of the combustion engine may be greater than or equal to 160 millimeters and less than or equal to 200 millimeters. The bank angle of the combustion engine may be greater than or equal to 60° and less than or equal to 90°.

[0023] The bore diameter of the combustion engine may be greater than or equal to 200 millimeters and less than or equal to 300 millimeters. The bank angle of the combustion engine may be greater than or equal to 45° and less than or equal to 60°.

[0024] Each of the internal combustion engines described above can have a crankshaft with ten crankshaft throws, wherein the crankshaft throws are numbered K1 to K10 starting from a free end along a longitudinal extension of the crankshaft and wherein the crankshaft throws form a symmetrical crank star, wherein the arrangement of the crankshaft throws is mirror-symmetrical with respect to a center plane oriented perpendicular to the longitudinal extension of the crankshaft, and wherein the crankshaft throws on the crank star, viewed clockwise from the free end, have one of the following sequences: i) K1, K10 - K4, K7 - K5, K6 - K2, K9 - K3, K8 ii) K1, K10 - K5, K6 - K2, K9 - K4, K7 - K3, K8 iii) K1, K10 - K4, K7 - K2, K9 - K5, K6 - K3, K8 iv) K1, K10 - K5, K6 - K3, K8 - K2, K9 - K4, K7 v) K1, K10 - K3, K8 - K5, K6 - K2, K9 - K4, K7 vi) K1, K10 - K5, K6 - K2, K9 - K3, K8 - K4, K7 vii) K1, K10 - K4, K7 - K3, K8 - K2, K9 - K5, K6 viii) K1, K10 - K3, K8 - K4, K7 - K2, K9 - K5, K6 ix) K1, K10 - K4, K7 - K2, K9 - K3, K8 - K5, K6 x) K1, K10 - K3, K8 - K2, K9 - K4, K7 - K5, K6.

[0025] With a suitable firing order, the crankshaft enables reduced torsional vibration of the crankshaft in the operation of four-stroke internal combustion engines in V design with 20 cylinders, which are equipped with a torsional vibration damper.

[0026] The crankshaft star can be cyclically symmetrical with respect to a longitudinal axis of the crankshaft. This means that the crankshaft star can be mapped onto itself by rotating around the longitudinal axis.

[0027] For each of the combustion engines described above, the following assignments between the crankshaft throws and the cylinders can be provided, with a numbering according to DIN 73021: - the crankshaft throw K1 is assigned to cylinders 1 and 11, - the crankshaft throw K2 is assigned to cylinders 2 and 12, - the crankshaft throw K3 is assigned to cylinders 3 and 13, - the crankshaft throw K4 is assigned to cylinders 4 and 14, - the crankshaft throw K5 is assigned to cylinders 5 and 15, - the crankshaft throw K6 is assigned to cylinders 6 and 16, - the crankshaft throw K7 is assigned to cylinders 7 and 17, - the crankshaft throw K8 is assigned to cylinders 8 and 18, - the crankshaft throw K9 is assigned to cylinders 9 and 19, - Cylinders 10 and 20 are assigned to crankshaft throw K10.

[0028] It can be provided that the crank star has a constant angular pitch of 72° or the crank star has an angular pitch selected from a range of 72° + / - 4°.

[0029] For each of the internal combustion engines described above with a bank angle of 90°, it can be provided that alternative embodiments of internal combustion engines are specified which have a bank angle selected from an angle range of greater than 72° to less than 144°.

[0030] For each of the internal combustion engines described above with a bank angle of 45, 50 or 60°, it can be provided that alternative embodiments of internal combustion engines are specified which have a bank angle selected from an angular range of greater than or equal to 30° to less than 72°.

[0031] With a suitable firing sequence, the combustion engine enables reduced torsional vibration excitation of the crankshaft during operation.

[0032] It can be provided that the crankshaft throws have the sequence i), whereby during operation of the internal combustion engine one of the following firing sequences is carried out, with the numbering of the cylinders according to DIN 73021, for a

[0033] Direction of rotation of the combustion engine, viewed from the free end, clockwise: ia) 1-17-8-11-9-13-5-19-7-16-10-14-3-20-2-18-6-12-4-15 ib) 1-17-8-11-9-13-5-19-7-15-10-14-3-20-2-18-6-12-4-16.

[0034] It may be provided that the crankshaft throws have the sequence ii), whereby during operation of the internal combustion engine one of the following firing sequences is carried out, with the numbering of the cylinders according to DIN 73021, for a direction of rotation of the internal combustion engine, viewed from the free end, clockwise: ii-a) 1-20-3-18-7-14-9-19-6-16-10-11-8-13-4-17-2-12-5-15 ii-c) 1-11-8-18-4-14-9-19-5-15-10-20-3-13-7-17-2-12-6-16 ii-d) 1-16-8-11-4-18-9-14-5-19-10-15-3-20-7-13-2-17-6-12 ii-e) 1-16-8-11-4-18-9-14-6-19-10-15-3-20-7-13-2-17-5-12.

[0035] It may be provided that the crankshaft throws have the sequence iii), whereby during operation of the internal combustion engine one of the following firing sequences is carried out, with the numbering of the cylinders according to DIN 73021, for a direction of rotation of the internal combustion engine, viewed from the free end, clockwise: iii-b) 1-20-3-18-6-15-9-19-7-17-10-11-8-13-5-16-2-12-4-14 iii-c) 1-20-3-18-6-16-9-19-7-17-10-11-8-13-5-15-2-12-4-14 iii-d) 1-20-3-18-6-16-9-19-7-14-10-11-8-13-5-15-2-12-4-17 iii-e) 1-11-3-13-5-16-2-19-4-17-10-20-8-18-6-15-9-12-7-14 iii-f) 1-20-3-18-5-15-9-19-7-17-10-11-8-13-6-16-2-12-4-14 iii-g) 1-20-3-18-5-16-9-19-7-17-10-11-8-13-6-15-2-12-4-14 iii-h) 1-20-3-18-6-15-9-19-7-14-10-11-8-13-5-16-2-12-4-17 iii-i) 1-20-3-18-5-16-9-19-7-14-10-11-8-13-6-15-2-12-4-17 iii-j) 1-11-3-13-5-15-2-19-4-17-10-20-8-18-6-16-9-12-7-14 iii-k) 1-11-3-13-6-16-2-19-4-17-10-20-8-18-5-15-9-12-7-14 iii-m) 1-20-3-13-6-16-2-19-4-14-10-11-8-18-5-15-9-12-7-17 iii-n) 1-20-3-13-5-16-2-19-4-14-10-11-8-18-6-15-9-12-7-17 iii-o) 1-20-3-13-6-15-2-19-4-14-10-11-8-18-5-16-9-12-7-17 iii-p) 1-20-3-13-5-15-2-19-4-14-10-11-8-18-6-16-9-12-7-17 iii-q) 1-11-8-13-6-16-9-19-4-14-10-20-3-18-5-15-2-12-7-17.

[0036] It may be provided that the crankshaft throws have the sequence iv), whereby during operation of the internal combustion engine one of the following firing sequences is carried out, with the numbering of the cylinders according to DIN 73021, for a direction of rotation of the internal combustion engine, viewed from the free end, clockwise: iv-a) 1-11-7-17-2-12-8-18-5-15-10-20-4-14-9-19-3-13-6-16 iv-b) 1-16-7-11-2-17-8-12-5-18-10-15-4-20-9-14-3-19-6-13 iv-c) 1-16-7-11-2-17-8-12-6-18-10-15-4-20-9-14-3-19-5-13 iv-d) 1-15-7-11-2-17-8-12-5-18-10-16-4-20-9-14-3-19-6-13.

[0037] It can be provided that the crankshaft throws have the sequence v), whereby during operation of the internal combustion engine one of the following firing sequences is carried out, with the numbering of the cylinders according to DIN 73021, for a direction of rotation of the internal combustion engine, viewed from the free end, clockwise: vb) 1-18-7-11-9-14-5-19-8-16-10-13-4-20-2-17-6-12-3-15 vc) 1-20-4-14-9-12-6-16-3-13-10-11-7-17-2-19-5-15-8-18 vd) 1-20-4-14-9-12-6-15-3-13-10-11-7-17-2-19-5-16-8-18 ve) 1-20-4-14-9-12-5-16-3-13-10-11-7-17-2-19-6-15-8-18 vf) 1-20-4-14-9-12-5-15-3-13-10-11-7-17-2-19-6-16-8-18 vh) 1-11-7-17-2-19-5-15-8-13-10-20-4-14-9-12-6-16-3-18 vj) 1-18-7-11-2-17-6-12-3-16-10-13-4-20-9-14-5-19-8-15 from left) 1-13-7-11-2-17-5-19-8-16-10-18-4-20-9-14-6-12-3-15 vm) 1-18-7-11-2-17-6-12-3-16-10-13-4-20-9-14-5-19-8-15 vn) 1-18-7-11-2-17-6-12-3-15-10-13-4-20-9-14-5-19-8-16 vo) 1-18-7-11-2-17-6-12-8-15-10-13-4-20-9-14-5-19-3-16 vp) 1-18-7-11-2-17-5-12-3-15-10-13-4-20-9-14-6-19-8-16 vq) 1-18-7-11-2-17-6-12-8-15-10-13-4-20-9-14-5-19-3-16 vr) 1-18-7-11-2-17-6-12-8-16-10-13-4-20-9-14-5-19-3-15 vs) 1-18-4-11-2-17-6-12-8-15-10-13-7-20-9-14-5-19-3-16 vt) 1-18-4-11-2-17-5-12-8-15-10-13-7-20-9-14-6-19-3-16 vu) 1-18-4-11-2-17-6-12-8-16-10-13-7-20-9-14-5-19-3-15.

[0038] It may be provided that the crankshaft throws have the sequence vi), whereby during operation of the internal combustion engine one of the following firing sequences is carried out, with the numbering of the cylinders according to DIN 73021, for a direction of rotation of the internal combustion engine, viewed from the free end, clockwise: vi-a) 1-15-4-11-3-14-2-18-5-19-10-16-7-20-8-17-9-13-6-12 vi-b) 1-11-7-17-3-13-9-19-5-15-10-20-4-14-8-18-2-12-6-16.

[0039] It may be provided that the crankshaft throws have the sequence vii), whereby during operation of the internal combustion engine one of the following firing sequences is carried out, with the numbering of the cylinders according to DIN 73021, for a direction of rotation of the internal combustion engine, viewed from the free end, clockwise: vii-a) 1-17-6-11-2-15-3-12-7-13-10-14-5-20-9-16-8-19-4-18 vii-b) 1-17-6-11-2-16-3-12-7-13-10-14-5-20-9-15-8-19-4-18 vii-c) 1-14-5-11-2-16-3-19-7-18-10-17-6-20-9-15-8-12-4-13 vii-d) 1-11-6-16-2-12-8-13-7-14-10-20-5-15-9-19-3-18-4-17.

[0040] It may be provided that the crankshaft throws have the sequence viii), whereby during operation of the internal combustion engine one of the following firing sequences is carried out, with the numbering of the cylinders according to DIN 73021, for a direction of rotation of the internal combustion engine, viewed from the free end, clockwise: viii-a) 1-13-5-11-2-16-4-19-8-17-10-18-6-20-9-15-7-12-3-14 viii-b) 1-13-6-11-2-16-4-19-8-17-10-18-5-20-9-15-7-12-3-14 viii-c) 1-20-5-15-9-12-7-17-3-13-10-11-6-16-2-19-4-14-8-18 viii-d) 1-11-6-16-2-12-7-17-3-13-10-20-5-15-9-19-4-14-8-18 viii-e) 1-11-6-16-2-19-4-14-8-13-10-20-5-15-9-12-7-17-3-18 viii-f) 1-18-6-11-2-16-7-12-3-17-10-13-5-20-9-15-4-19-8-14 viii-g) 1-18-5-11-2-16-7-12-3-17-10-13-6-20-9-15-4-19-8-14.

[0041] It may be provided that the crankshaft throws have the sequence xi), whereby during operation of the internal combustion engine one of the following firing sequences is carried out, with the numbering of the cylinders according to DIN 73021, for a direction of rotation of the internal combustion engine, viewed from the free end, clockwise: ix-a) 1-11-6-16-3-13-9-19-4-14-10-20-5-15-8-18-2-12-7-17 ix-b) 1-17-6-11-3-16-9-13-4-19-10-14-5-20-8-15-2-18-7-12 ix-c) 1-17-6-11-3-15-9-13-4-19-10-14-5-20-8-16-2-18-7-12.

[0042] It can be provided that the crankshaft throws have the sequence x), whereby during operation of the internal combustion engine one of the following firing sequences is carried out, with the numbering of the cylinders according to DIN 73021, for a direction of rotation of the internal combustion engine, viewed from the free end, clockwise: xa) 1-18-6-11-4-16-2-17-8-12-10-13-5-20-7-15-9-14-3-19.

[0043] It is understood that each of the aforementioned firing sequences for a direction of rotation of the internal combustion engine, viewed from the free end, can also be carried out counterclockwise, i.e., in reverse order. The firing sequence ia) therefore results in a firing sequence: ia)* 15-4-12-6-18-2-20-3-14-10-16-7-19-5-13-9-11-8-17-1 which is identical to the following firing order: 1-15-4-12-6-18-2-20-3-14-10-16-7-19-5-13-9-11-8-17.

[0044] Overall, therefore, for each of the aforementioned firing orders for a direction of rotation of the internal combustion engine, viewed from the free end, counterclockwise, the following firing orders can be specified: ia)* 1-15-4-12-6-18-2-20-3-14-10-16-7-19-5-13-9-11-8-17 ib)* 1-16-4-12-6-18-2-20-3-14-10-15-7-19-5-13-9-11-8-17 ii-a)* 1-15-5-12-2-17-4-13-8-11-10-16-6-19-9-14-7-18-3-20 ii-c)* 1-16-6-12-2-17-7-13-3-20-10-15-5-19-9-14-4-18-8-11 ii-d)* 1-12-6-17-2-13-7-20-3-15-10-19-5-14-9-18-4-11-8-16 ii-e)* 1-12-5-17-2-13-7-20-3-15-10-19-6-14-9-18-4-11-8-16 iii-b)* 1-14-4-12-2-16-5-13-8-11-10-17-7-19-9-15-6-18-3-20 iii-c)* 1-14-4-12-2-15-5-13-8-11-10-17-7-19-9-16-6-18-3-20 iii-d)* 1-17-4-12-2-15-5-13-8-11-10-14-7-19-9-16-6-18-3-20 iii-e)* 1-14-7-12-9-15-6-18-8-20-10-17-4-19-2-16-5-13-3-11 iii-f)* 1-14-4-12-2-16-6-13-8-11-10-17-7-19-9-15-5-18-3-20 iii-g)* 1-14-4-12-2-15-6-13-8-11-10-17-7-19-9-16-5-18-3-20 iii-h)* 1-17-4-12-2-16-5-13-8-11-10-14-7-19-9-15-6-18-3-20 iii-i)* 1-17-4-12-2-15-6-13-8-11-10-14-7-19-9-16-5-18-3-20 iii-j)* 1-14-7-12-9-16-6-18-8-20-10-17-4-19-2-15-5-13-3-11 iii-k)* 1-14-7-12-9-15-5-18-8-20-10-17-4-19-2-16-6-13-3-11 iii-m)* 1-17-7-12-9-15-5-18-8-11-10-14-4-19-2-16-6-13-3-20 iii-n)* 1-17-7-12-9-15-6-18-8-11-10-14-4-19-2-16-5-13-3-20 iii-o)* 1-17-7-12-9-16-5-18-8-11-10-14-4-19-2-15-6-13-3-20 iii-p)* 1-17-7-12-9-16-6-18-8-11-10-14-4-19-2-15-5-13-3-20 iii-q)* 1-17-7-12-2-15-5-18-3-20-10-14-4-19-9-16-6-13-8-11 iv-a)* 1-16-6-13-3-19-9-14-4-20-10-15-5-18-8-12-2-17-7-11 iv-b)* 1-13-6-19-3-14-9-20-4-15-10-18-5-12-8-17-2-11-7-16 iv-c)* 1-13-5-19-3-14-9-20-4-15-10-18-6-12-8-17-2-11-7-16 iv-d)* 1-13-6-19-3-14-9-20-4-16-10-18-5-12-8-17-2-11-7-15 vb)* 1-15-3-12-6-17-2-20-4-13-10-16-8-19-5-14-9-11-7-18 vc)* 1-18-8-15-5-19-2-17-7-11-10-13-3-16-6-12-9-14-4-20 vd)* 1-18-8-16-5-19-2-17-7-11-10-13-3-15-6-12-9-14-4-20 and)* 1-18-8-15-6-19-2-17-7-11-10-13-3-16-5-12-9-14-4-20 vf)* 1-18-8-16-6-19-2-17-7-11-10-13-3-15-5-12-9-14-4-20 vh)* 1-18-3-16-6-12-9-14-4-20-10-13-8-15-5-19-2-17-7-11 vj)* 1-15-8-19-5-14-9-20-4-13-10-16-3-12-6-17-2-11-7-18 vl)* 1-15-3-12-6-14-9-20-4-18-10-16-8-19-5-17-2-11-7-13 vm)* 1-15-8-19-5-14-9-20-4-13-10-16-3-12-6-17-2-11-7-18 vn)* 1-16-8-19-5-14-9-20-4-13-10-15-3-12-6-17-2-11-7-18 vo)* 1-16-3-19-5-14-9-20-4-13-10-15-8-12-6-17-2-11-7-18 vp)* 1-16-8-19-6-14-9-20-4-13-10-15-3-12-5-17-2-11-7-18 vq)* 1-16-3-19-5-14-9-20-4-13-10-15-8-12-6-17-2-11-7-18 vr)* 1-15-3-19-5-14-9-20-4-13-10-16-8-12-6-17-2-11-7-18 vs)* 1-16-3-19-5-14-9-20-7-13-10-15-8-12-6-17-2-11-4-18 vt)* 1-16-3-19-6-14-9-20-7-13-10-15-8-12-5-17-2-11-4-18 vu)* 1-15-3-19-5-14-9-20-7-13-10-16-8-12-6-17-2-11-4-18 vi-a)* 1-12-6-13-9-17-8-20-7-16-10-19-5-18-2-14-3-11-4-15 vi-b)* 1-16-6-12-2-18-8-14-4-20-10-15-5-19-9-13-3-17-7-11 vii-a)* 1-18-4-19-8-16-9-20-5-14-10-13-7-12-3-15-2-11-6-17 vii-b)* 1-18-4-19-8-15-9-20-5-14-10-13-7-12-3-16-2-11-6-17 vii-c)* 1-13-4-12-8-15-9-20-6-17-10-18-7-19-3-16-2-11-5-14 vii-d)* 1-17-4-18-3-19-9-15-5-20-10-14-7-13-8-12-2-16-6-11 viii-a)* 1-14-3-12-7-15-9-20-6-18-10-17-8-19-4-16-2-11-5-13 viii-b)* 1-14-3-12-7-15-9-20-5-18-10-17-8-19-4-16-2-11-6-13 viii-c)* 1-18-8-14-4-19-2-16-6-11-10-13-3-17-7-12-9-15-5-20 viii-d)* 1-18-8-14-4-19-9-15-5-20-10-13-3-17-7-12-2-16-6-11 viii-e)* 1-18-3-17-7-12-9-15-5-20-10-13-8-14-4-19-2-16-6-11 viii-f)* 1-14-8-19-4-15-9-20-5-13-10-17-3-12-7-16-2-11-6-18 viii-g)* 1-14-8-19-4-15-9-20-6-13-10-17-3-12-7-16-2-11-5-18 ix-a)* 1-17-7-12-2-18-8-15-5-20-10-14-4-19-9-13-3-16-6-11 ix-b)* 1-12-7-18-2-15-8-20-5-14-10-19-4-13-9-16-3-11-6-17 ix-c)* 1-12-7-18-2-16-8-20-5-14-10-19-4-13-9-15-3-11-6-17 xa)* 1-19-3-14-9-15-7-20-5-13-10-12-8-17-2-16-4-11-6-18.

[0045] The invention is described in more detail below with reference to a drawing illustrating exemplary embodiments. The drawings schematically show: Fig. 1A a first crankshaft in a plan view; Fig. 1B the first crankshaft in a side view; Fig. 1C a crankshaft star made of Fig. 1A; Fig. 1D the crank star with associated cylinders of the crankshaft Fig. 1A; Fig. 2 a crank star of a second crankshaft; Fig. 3 a crank star of a third crankshaft; Fig. 4 a crank star of a fourth crankshaft; Fig. 5 a crank star of a fifth crankshaft; Fig. 6 a crank star of a sixth crankshaft; Fig. 7 a crank star of a seventh crankshaft; Fig. 8 a crank star of an eighth crankshaft; Fig. 9 a crank star of a ninth crankshaft; Fig. 10 a crank star of a tenth crankshaft; Fig. 11 an internal combustion engine according to the invention.

[0046] Fig. 1A shows a first crankshaft 2 in a plan view.

[0047] The crankshaft has ten crankshaft throws, K1 to K10. Starting from a free end 4, the crankshaft throws K1 to K10 are numbered in ascending order from K1 to K10 along a longitudinal extension or longitudinal axis L of the crankshaft 2. All cylinder numbering is performed in accordance with DIN 73021.

[0048] A torsional vibration damper (not shown) can be assigned to the free end 4. The free end 4 is an end of the crankshaft 2 facing away from the clutch side 6.

[0049] The crankshaft throws K1 - K10 form a symmetrical crank star 8, as in Fig. 1C and Fig. 1D to recognize.

[0050] The arrangement of the crankshaft throws K1 - K10 is mirror-symmetrical with respect to a center plane M, which is oriented perpendicular to the longitudinal extension L of the crankshaft 2. The symmetry is shown in the Fig. 1A and Fig. 1B shown.

[0051] The crankshaft throws K1 - K10 have the following sequence i) on the crank star 8, viewed from the free end 4 in a clockwise direction in the present example: K1, K10 - K4, K7 - K5, K6 - K2, K9 - K3, K8.

[0052] The crank star 8 has, for example, a constant angular pitch of 72° (+ / - 4°).

[0053] The longitudinal axis L of crankshaft 2 is collinear with the y-axis of the Cartesian coordinate system xyz. The longitudinal axis L is the rotational axis of crankshaft 2. The center plane M is therefore parallel to the xz-plane of the Cartesian coordinate system xyz.

[0054] For better traceability of a fully assembled state, Fig. 1C and Fig. 1D shows, in addition to the crankshaft 2, the cylinder banks 1 and 2 (Bank1 and Bank2) - with the associated bank angle V.

[0055] Fig. 1D shows the crank star according to Fig. 1C in a different spelling, since according to Fig. 1D instead of the crankshaft throws K1 - K10, the cylinders assigned to the fully assembled state are shown on the crank star 8. The information of the Fig. 1C and Fig. 1D are identical in terms of the crankshaft layout and are intended only for better understanding. From the illustration according to Fig. 1C or Fig. 1D and the note that the cylinder numbering of DIN 73021 is to be used here, the representations of the Fig. 1A and Fig. 1B. The representation of the crankshaft throws K1 - K10 is therefore only shown for the example given here in order to demonstrate the symmetry and overall the Fig. 1A and Fig. 1B. For the further examples according to the invention, only a representation analogous to Fig. 1D shown.

[0056] Fig. 2 shows a crank star of a second crankshaft. The sequence according to Fig. 2 corresponds to the sequence ii) K1, K10 - K5, K6 - K2, K9 - K4, K7 - K3, K8.

[0057] Fig. 3 shows a crank star of a third crankshaft. The sequence according to Fig. 3 corresponds to the sequence iii) K1, K10 - K4, K7 - K2, K9 - K5, K6 - K3, K8.

[0058] Fig. 4 shows a crank star of a fourth crankshaft. The sequence according to Fig. 4 corresponds to the sequence iv) K1, K10 - K5, K6 - K3, K8 - K2, K9 - K4, K7.

[0059] Fig. 5 shows a crank star of a fifth crankshaft. The sequence according to Fig. 5 corresponds to the sequence v) K1, K10 - K3, K8 - K5, K6 - K2, K9 - K4, K7.

[0060] Fig. 6 shows a crank star of a sixth crankshaft. The sequence according to Fig. 6 corresponds to the sequence vi) K1, K10 - K5, K6 - K2, K9 - K3, K8 - K4, K7.

[0061] Fig. 7 shows a crank star of a seventh crankshaft. The sequence according to Fig. 7 corresponds to the sequence vii) K1, K10 - K4, K7 - K3, K8 - K2, K9 - K5, K6.

[0062] Fig. 8 shows a crank star of an eighth crankshaft. The sequence according to Fig. 8 corresponds to the sequence viii) K1, K10 - K3, K8 - K4, K7 - K2, K9 - K5, K6.

[0063] Fig. 9 shows a crank star of a ninth crankshaft. The sequence according to Fig. 9 corresponds to the sequence ix) K1, K10 - K4, K7 - K2, K9 - K3, K8 - K5, K6.

[0064] Fig. 10 shows a crank star of a tenth crankshaft. The sequence according to Fig. 10 corresponds to the sequence x) K1, K10 - K3, K8 - K2, K9 - K4, K7 - K5, K6.

[0065] Fig. 11 shows an internal combustion engine 10 according to the invention. The internal combustion engine 12 is a four-stroke internal combustion engine in V-construction with 20 cylinders 1 - 10 and 11 - 20. The cylinders 1 - 10 and 11 - 20 are accordingly Fig. Numbered 1A according to DIN 73021.

[0066] The combustion engine 10 has, by way of example, the crankshaft 2 according to Fig. 1D on.

[0067] It is understood that in the internal combustion engine 10, any other crankshaft according to the Fig. 2 - 10 could be installed, using the firing order and bank angles mentioned in this text.

[0068] The crankshaft 2 is coupled to a coupling element 12 in the region of its clutch side 6. The crankshaft 2 is coupled to a torsional vibration damper 14 in the region of the free end 4.

[0069] Two cylinders are each coupled to an associated crankshaft throw, resulting in the following assignments between the crankshaft throws and the cylinders, with numbering according to DIN 73021: Cylinders 1 and 11 are assigned to crankshaft throw K2. Cylinders 2 and 12 are assigned to crankshaft throw K3. Cylinders 3 and 13 are assigned to crankshaft throw K4. Cylinders 4 and 14 are assigned to crankshaft throw K5. Cylinders 5 and 15 are assigned to crankshaft throw K6. Cylinders 7 and 17 are assigned to crankshaft throw K7. Cylinders 8 and 18 are assigned to crankshaft throw K9. Cylinders 9 and 19 are assigned to crankshaft throw K9. Cylinders 10 and 20 are assigned to crankshaft throw K10.

[0070] The internal combustion engine 10 has the crankshaft 2, ie the crankshaft 2 discussed as an example, whose crankshaft throws K1 - K10 on the crank star 8, viewed from the free end 4, have the following sequence in a clockwise direction: K1, K10 - K4, K7 - K5, K6 - K2, K9 - K3, K8.

[0071] The internal combustion engine 10 is designed so that during operation of the internal combustion engine 10 one of the following firing sequences is carried out, with the numbering of the cylinders according to DIN 73021, for a direction of rotation of the internal combustion engine 10, viewed from the free end 4, clockwise: ia) 1-17-8-11-9-13-5-19-7-16-10-14-3-20-2-18-6-12-4-15 ib) 1-17-8-11-9-13-5-19-7-15-10-14-3-20-2-18-6-12-4-16,where the bank angle V of the combustion engine 10 is 90°.

[0072] In the example shown here, a bank offset of the cylinder banks Bank1 and Bank2 is selected by way of example and schematically such that cylinder 11 of cylinder bank Bank2 is closer to the coupling element 12, such as a flywheel or the like, than cylinder 1 of cylinder bank Bank1. According to alternative embodiments, it can be provided that the bank offset of the cylinder banks Bank1 and Bank2 is selected such that cylinder 1 of cylinder bank Bank1 is closer to the coupling element 12 than cylinder 11 of cylinder bank Bank2. According to alternative embodiments, it can be provided that there is no bank offset of the cylinder banks Bank1 and Bank2, so that cylinders 1 and 11 lie in one plane. This can be achieved, for example, by means of hinged connecting rods or forked connecting rods.

[0073] It goes without saying that all of the above numbering can also be represented according to DIN ISO 1204, SAE J824 or any other cylinder numbering standard.

Claims

[1] Internal combustion engine, - the internal combustion engine being a four-stroke V-type internal combustion engine with twenty cylinders arranged in two cylinder banks enclosing a bank angle, - whereby, during operation of the internal combustion engine, one of the following firing sequences is carried out, with the numbering of the cylinders according to DIN 73021, for a direction of rotation of the internal combustion engine, viewed from the free end, clockwise: ia) 1-17-8-11-9-13-5-19-7-16-10-14-3-20-2-18-6-12-4-15 ib) 1-17-8-11-9-13-5-19-7-15-10-14-3-20-2-18-6-12-4-16 or for a direction of rotation of the internal combustion engine, viewed from the free end, counterclockwise: ia)* 1-15-4-12-6-18-2-20-3-14-10-16-7-19-5-13-9-11-8-17 ib)* 1-16-4-12-6-18-2-20-3-14-10-15-7-19-5-13-9-11-8-17. [2] Internal combustion engine, - the internal combustion engine being a four-stroke V-type internal combustion engine with twenty cylinders arranged in two cylinder banks enclosing a bank angle, - whereby, during operation of the internal combustion engine, one of the following firing sequences is carried out, with the numbering of the cylinders according to DIN 73021, for a direction of rotation of the internal combustion engine, viewed from the free end, clockwise: ii-a) 1-20-3-18-7-14-9-19-6-16-10-11-8-13-4-17-2-12-5-15 ii-c) 1-11-8-18-4-14-9-19-5-15-10-20-3-13-7-17-2-12-6-16 ii-d) 1-16-8-11-4-18-9-14-5-19-10-15-3-20-7-13-2-17-6-12 ii-e) 1-16-8-11-4-18-9-14-6-19-10-15-3-20-7-13-2-17-5-12 or for a direction of rotation of the internal combustion engine, viewed from the free end, counterclockwise: ii-a)* 1-15-5-12-2-17-4-13-8-11-10-16-6-19-9-14-7-18-3-20 ii-c)* 1-16-6-12-2-17-7-13-3-20-10-15-5-19-9-14-4-18-8-11 ii-d)* 1-12-6-17-2-13-7-20-3-15-10-19-5-14-9-18-4-11-8-16 ii-e)* 1-12-5-17-2-13-7-20-3-15-10-19-6-14-9-18-4-11-8-16. [3] Internal combustion engine, - the internal combustion engine is a four-stroke V-type internal combustion engine with twenty cylinders arranged in two cylinder banks enclosing a bank angle, - whereby, during operation of the internal combustion engine, one of the following firing sequences is carried out, with the numbering of the cylinders according to DIN 73021, for a direction of rotation of the internal combustion engine, viewed from the free end, clockwise: iii-b) 1-20-3-18-6-15-9-19-7-17-10-11-8-13-5-16-2-12-4-14 iii-c) 1-20-3-18-6-16-9-19-7-17-10-11-8-13-5-15-2-12-4-14 iii-d) 1-20-3-18-6-16-9-19-7-14-10-11-8-13-5-15-2-12-4-17 iii-e) 1-11-3-13-5-16-2-19-4-17-10-20-8-18-6-15-9-12-7-14 iii-f) 1-20-3-18-5-15-9-19-7-17-10-11-8-13-6-16-2-12-4-14 iii-g) 1-20-3-18-5-16-9-19-7-17-10-11-8-13-6-15-2-12-4-14 iii-h) 1-20-3-18-6-15-9-19-7-14-10-11-8-13-5-16-2-12-4-17 iii-i) 1-20-3-18-5-16-9-19-7-14-10-11-8-13-6-15-2-12-4-17 iii-j) 1-11-3-13-5-15-2-19-4-17-10-20-8-18-6-16-9-12-7-14 iii-k) 1-11-3-13-6-16-2-19-4-17-10-20-8-18-5-15-9-12-7-14 iii-m) 1-20-3-13-6-16-2-19-4-14-10-11-8-18-5-15-9-12-7-17 iii-n) 1-20-3-13-5-16-2-19-4-14-10-11-8-18-6-15-9-12-7-17 iii-o) 1-20-3-13-6-15-2-19-4-14-10-11-8-18-5-16-9-12-7-17 iii-p) 1-20-3-13-5-15-2-19-4-14-10-11-8-18-6-16-9-12-7-17 iii-q) 1-11-8-13-6-16-9-19-4-14-10-20-3-18-5-15-2-12-7-17 or for a direction of rotation of the internal combustion engine, viewed from the free end, counterclockwise: iii-b)* 1-14-4-12-2-16-5-13-8-11-10-17-7-19-9-15-6-18-3-20 iii-c)* 1-14-4-12-2-15-5-13-8-11-10-17-7-19-9-16-6-18-3-20 iii-d)* 1-17-4-12-2-15-5-13-8-11-10-14-7-19-9-16-6-18-3-20 iii-e)* 1-14-7-12-9-15-6-18-8-20-10-17-4-19-2-16-5-13-3-11 iii-f)* 1-14-4-12-2-16-6-13-8-11-10-17-7-19-9-15-5-18-3-20 iii-g)* 1-14-4-12-2-15-6-13-8-11-10-17-7-19-9-16-5-18-3-20 iii-h)* 1-17-4-12-2-16-5-13-8-11-10-14-7-19-9-15-6-18-3-20 iii-i)* 1-17-4-12-2-15-6-13-8-11-10-14-7-19-9-16-5-18-3-20 iii-j)* 1-14-7-12-9-16-6-18-8-20-10-17-4-19-2-15-5-13-3-11 iii-k)* 1-14-7-12-9-15-5-18-8-20-10-17-4-19-2-16-6-13-3-11 iii-m)* 1-17-7-12-9-15-5-18-8-11-10-14-4-19-2-16-6-13-3-20 iii-n)* 1-17-7-12-9-15-6-18-8-11-10-14-4-19-2-16-5-13-3-20 iii-o)* 1-17-7-12-9-16-5-18-8-11-10-14-4-19-2-15-6-13-3-20 iii-p)* 1-17-7-12-9-16-6-18-8-11-10-14-4-19-2-15-5-13-3-20 iii-q)* 1-17-7-12-2-15-5-18-3-20-10-14-4-19-9-16-6-13-8-11. [4] Verbrennungsmotor, - the internal combustion engine is a four-stroke V-type internal combustion engine with twenty cylinders arranged in two cylinder banks enclosing a bank angle, - whereby, during operation of the internal combustion engine, one of the following firing sequences is carried out, with the numbering of the cylinders according to DIN 73021, for a direction of rotation of the internal combustion engine, viewed from the free end, clockwise: iv-a) 1-11-7-17-2-12-8-18-5-15-10-20-4-14-9-19-3-13-6-16 iv-b) 1-16-7-11-2-17-8-12-5-18-10-15-4-20-9-14-3-19-6-13 iv-c) 1-16-7-11-2-17-8-12-6-18-10-15-4-20-9-14-3-19-5-13 iv-d) 1-15-7-11-2-17-8-12-5-18-10-16-4-20-9-14-3-19-6-13 or for a direction of rotation of the internal combustion engine, viewed from the free end, counterclockwise: iv-a)* 1-16-6-13-3-19-9-14-4-20-10-15-5-18-8-12-2-17-7-11 iv-b)* 1-13-6-19-3-14-9-20-4-15-10-18-5-12-8-17-2-11-7-16 iv-c)* 1-13-5-19-3-14-9-20-4-15-10-18-6-12-8-17-2-11-7-16 iv-d)* 1-13-6-19-3-14-9-20-4-16-10-18-5-12-8-17-2-11-7-15. [5] Internal combustion engine, - the internal combustion engine being a four-stroke V-type internal combustion engine with twenty cylinders arranged in two cylinder banks enclosing a bank angle, - whereby, during operation of the internal combustion engine, one of the following firing sequences is carried out, with the numbering of the cylinders according to DIN 73021, for a direction of rotation of the internal combustion engine, viewed from the free end, clockwise: vb) 1-18-7-11-9-14-5-19-8-16-10-13-4-20-2-17-6-12-3-15 vc) 1-20-4-14-9-12-6-16-3-13-10-11-7-17-2-19-5-15-8-18 vd) 1-20-4-14-9-12-6-15-3-13-10-11-7-17-2-19-5-16-8-18 ve) 1-20-4-14-9-12-5-16-3-13-10-11-7-17-2-19-6-15-8-18 vf) 1-20-4-14-9-12-5-15-3-13-10-11-7-17-2-19-6-16-8-18 vh) 1-11-7-17-2-19-5-15-8-13-10-20-4-14-9-12-6-16-3-18 vj) 1-18-7-11-2-17-6-12-3-16-10-13-4-20-9-14-5-19-8-15 from left) 1-13-7-11-2-17-5-19-8-16-10-18-4-20-9-14-6-12-3-15 vm) 1-18-7-11-2-17-6-12-3-16-10-13-4-20-9-14-5-19-8-15 vn) 1-18-7-11-2-17-6-12-3-15-10-13-4-20-9-14-5-19-8-16 vo) 1-18-7-11-2-17-6-12-8-15-10-13-4-20-9-14-5-19-3-16 vp) 1-18-7-11-2-17-5-12-3-15-10-13-4-20-9-14-6-19-8-16 vq) 1-18-7-11-2-17-6-12-8-15-10-13-4-20-9-14-5-19-3-16 vr) 1-18-7-11-2-17-6-12-8-16-10-13-4-20-9-14-5-19-3-15 vs) 1-18-4-11-2-17-6-12-8-15-10-13-7-20-9-14-5-19-3-16 vt) 1-18-4-11-2-17-5-12-8-15-10-13-7-20-9-14-6-19-3-16 vu) 1-18-4-11-2-17-6-12-8-16-10-13-7-20-9-14-5-19-3-15 or for a direction of rotation of the internal combustion engine, viewed from the free end, counterclockwise: vb)* 1-15-3-12-6-17-2-20-4-13-10-16-8-19-5-14-9-11-7-18 v-c)* 1-18-8-15-5-19-2-17-7-11-10-13-3-16-6-12-9-14-4-20 v-d)* 1-18-8-16-5-19-2-17-7-11-10-13-3-15-6-12-9-14-4-20 v-e)* 1-18-8-15-6-19-2-17-7-11-10-13-3-16-5-12-9-14-4-20 v-f)* 1-18-8-16-6-19-2-17-7-11-10-13-3-15-5-12-9-14-4-20 v-h)* 1-18-3-16-6-12-9-14-4-20-10-13-8-15-5-19-2-17-7-11 v-j)* 1-15-8-19-5-14-9-20-4-13-10-16-3-12-6-17-2-11-7-18 v-l)* 1-15-3-12-6-14-9-20-4-18-10-16-8-19-5-17-2-11-7-13 v-m)* 1-15-8-19-5-14-9-20-4-13-10-16-3-12-6-17-2-11-7-18 v-n)* 1-16-8-19-5-14-9-20-4-13-10-15-3-12-6-17-2-11-7-18 v-o)* 1-16-3-19-5-14-9-20-4-13-10-15-8-12-6-17-2-11-7-18 v-p)* 1-16-8-19-6-14-9-20-4-13-10-15-3-12-5-17-2-11-7-18 v-q)* 1-16-3-19-5-14-9-20-4-13-10-15-8-12-6-17-2-11-7-18 v-r)* 1-15-3-19-5-14-9-20-4-13-10-16-8-12-6-17-2-11-7-18 v-s)* 1-16-3-19-5-14-9-20-7-13-10-15-8-12-6-17-2-11-4-18 vt)* 1-16-3-19-6-14-9-20-7-13-10-15-8-12-5-17-2-11-4-18 vu)* 1-15-3-19-5-14-9-20-7-13-10-16-8-12-6-17-2-11-4-18. [6] Internal combustion engine, - the internal combustion engine being a four-stroke V-type internal combustion engine with twenty cylinders arranged in two cylinder banks enclosing a bank angle, - whereby, during operation of the internal combustion engine, one of the following firing sequences is carried out, with the numbering of the cylinders according to DIN 73021, for a direction of rotation of the internal combustion engine, viewed from the free end, clockwise: vi-a) 1-15-4-11-3-14-2-18-5-19-10-16-7-20-8-17-9-13-6-12 vi-b) 1-11-7-17-3-13-9-19-5-15-10-20-4-14-8-18-2-12-6-16 or for a direction of rotation of the internal combustion engine, viewed from the free end, counterclockwise: vi-a)* 1-12-6-13-9-17-8-20-7-16-10-19-5-18-2-14-3-11-4-15 vi-b)* 1-16-6-12-2-18-8-14-4-20-10-15-5-19-9-13-3-17-7-11. [7] Internal combustion engine, - the internal combustion engine being a four-stroke V-type internal combustion engine with twenty cylinders arranged in two cylinder banks enclosing a bank angle, - whereby, during operation of the internal combustion engine, one of the following firing sequences is carried out, with the numbering of the cylinders according to DIN 73021, for a direction of rotation of the internal combustion engine, viewed from the free end, clockwise: vii-a) 1-17-6-11-2-15-3-12-7-13-10-14-5-20-9-16-8-19-4-18 vii-b) 1-17-6-11-2-16-3-12-7-13-10-14-5-20-9-15-8-19-4-18 vii-c) 1-14-5-11-2-16-3-19-7-18-10-17-6-20-9-15-8-12-4-13 vii-d) 1-11-6-16-2-12-8-13-7-14-10-20-5-15-9-19-3-18-4-17 or for a direction of rotation of the internal combustion engine, viewed from the free end, counterclockwise: vii-a)* 1-18-4-19-8-16-9-20-5-14-10-13-7-12-3-15-2-11-6-17 vii-b)* 1-18-4-19-8-15-9-20-5-14-10-13-7-12-3-16-2-11-6-17 vii-c)* 1-13-4-12-8-15-9-20-6-17-10-18-7-19-3-16-2-11-5-14 vii-d)* 1-17-4-18-3-19-9-15-5-20-10-14-7-13-8-12-2-16-6-11. [8] Internal combustion engine, - the internal combustion engine being a four-stroke V-type internal combustion engine with twenty cylinders arranged in two cylinder banks enclosing a bank angle, - whereby, during operation of the internal combustion engine, one of the following firing sequences is carried out, with the numbering of the cylinders according to DIN 73021, for a direction of rotation of the internal combustion engine, viewed from the free end, clockwise: viii-a) 1-13-5-11-2-16-4-19-8-17-10-18-6-20-9-15-7-12-3-14 viii-b) 1-13-6-11-2-16-4-19-8-17-10-18-5-20-9-15-7-12-3-14 viii-c) 1-20-5-15-9-12-7-17-3-13-10-11-6-16-2-19-4-14-8-18 viii-d) 1-11-6-16-2-12-7-17-3-13-10-20-5-15-9-19-4-14-8-18 viii-e) 1-11-6-16-2-19-4-14-8-13-10-20-5-15-9-12-7-17-3-18 viii-f) 1-18-6-11-2-16-7-12-3-17-10-13-5-20-9-15-4-19-8-14 viii-g) 1-18-5-11-2-16-7-12-3-17-10-13-6-20-9-15-4-19-8-14 or for a direction of rotation of the internal combustion engine, viewed from the free end, counterclockwise: viii-a)* 1-14-3-12-7-15-9-20-6-18-10-17-8-19-4-16-2-11-5-13 viii-b)* 1-14-3-12-7-15-9-20-5-18-10-17-8-19-4-16-2-11-6-13 viii-c)* 1-18-8-14-4-19-2-16-6-11-10-13-3-17-7-12-9-15-5-20 viii-d)* 1-18-8-14-4-19-9-15-5-20-10-13-3-17-7-12-2-16-6-11 viii-e)* 1-18-3-17-7-12-9-15-5-20-10-13-8-14-4-19-2-16-6-11 viii-f)* 1-14-8-19-4-15-9-20-5-13-10-17-3-12-7-16-2-11-6-18 viii-g)* 1-14-8-19-4-15-9-20-6-13-10-17-3-12-7-16-2-11-5-18. [9] Internal combustion engine, - the internal combustion engine is a four-stroke V-type internal combustion engine with twenty cylinders arranged in two cylinder banks enclosing a bank angle, - whereby, during operation of the internal combustion engine, one of the following firing sequences is carried out, with the numbering of the cylinders according to DIN 73021, for a direction of rotation of the internal combustion engine, viewed from the free end, clockwise: ix-a) 1-11-6-16-3-13-9-19-4-14-10-20-5-15-8-18-2-12-7-17 ix-b) 1-17-6-11-3-16-9-13-4-19-10-14-5-20-8-15-2-18-7-12 ix-c) 1-17-6-11-3-15-9-13-4-19-10-14-5-20-8-16-2-18-7-12 or for a direction of rotation of the internal combustion engine, viewed from the free end, counterclockwise: ix-a)* 1-17-7-12-2-18-8-15-5-20-10-14-4-19-9-13-3-16-6-11 ix-b)* 1-12-7-18-2-15-8-20-5-14-10-19-4-13-9-16-3-11-6-17 ix-c)* 1-12-7-18-2-16-8-20-5-14-10-19-4-13-9-15-3-11-6-17. [10] Internal combustion engine, - the internal combustion engine is a four-stroke V-type internal combustion engine with twenty cylinders arranged in two cylinder banks enclosing a bank angle, - whereby, during operation of the internal combustion engine, one of the following firing sequences is carried out, with the numbering of the cylinders according to DIN 73021, for a direction of rotation of the internal combustion engine, viewed from the free end, clockwise: xa) 1-18-6-11-4-16-2-17-8-12-10-13-5-20-7-15-9-14-3-19 or for a direction of rotation of the internal combustion engine, viewed from the free end, counterclockwise: xa)* 1-19-3-14-9-15-7-20-5-13-10-12-8-17-2-16-4-11-6-18.