Four-stroke reciprocating piston engine in a V configuration having 20 cylinders

A four-stroke reciprocating piston engine in a V configuration having 20 cylinders including cylinders A1 to A10 and cylinders B1 to B10, having a crankshaft with a clockwise direction of rotation, having an ignition timing control which fires the cylinders A1 to A10 and the cylinders B1 to B10 in at least one of the following firing sequences, wherein the direction of rotation and a cylinder numbering are defined in accordance with DIN ISO 1204 with the cylinders A1 to A10 being arranged in order along an axis of rotation of the crankshaft forming a first bank of cylinders in the V configuration and the cylinders B1 to B10 being arranged in order along the axis of rotation of the crankshaft forming a second bank of cylinders in the V configuration:

• a) A1-B5-A4-B10-A8-B7-A2-B3-A6-B9-A10-B6-A7-B1-A3-B4-A9-B8-A5-B2
• b) A1-B5-A4-B10-A8-B7-A2-B3-A5-B9-A10-B6-A7-B1-A3-B4-A9-B8-A6-B2
• c) A1-B7-A6-B10-A9-B6-A3-B2-A7-B8-A10-B4-A5-B1-A2-B5-A8-B9-A4-B3
• d) A1-B7-A5-B10-A9-B6-A3-B2-A7-B8-A10-B4-A6-B1-A2-B5-A8-B9-A4-B3
• e) A1-B7-A6-B10-A9-B5-A3-B2-A7-B8-A10-B4-A5-B1-A2-B6-A8-B9-A4-B3
• f) A1-B7-A5-B10-A9-B5-A3-B2-A7-B8-A10-B4-A6-B1-A2-B6-A8-B9-A4-B3
• g) A1-B6-A4-B10-A8-B7-A2-B3-A6-B9-A10-B5-A7-B1-A3-B4-A9-B8-A5-B2
• h) A1-B6-A4-B10-A8-B7-A2-B3-A5-B9-A10-B5-A7-B1-A3-B4-A9-B8-A6-B2
• i) A1-B5-A4-B1-A2-B4-A8-B2-A6-B8-A10-B6-A7-B10-A9-B7-A3-B9-A5-B3
• j) A1-B5-A3-B10-A7-B8-A2-B4-A6-B9-A10-B6-A8-B1-A4-B3-A9-B7-A5-B2
• k) A1-B5-A3-B10-A7-B8-A2-B4-A5-B9-A10-B6-A8-B1-A4-B3-A9-B7-A6-B2
• l) A1-B6-A3-B10-A7-B8-A2-B4-A6-B9-A10-B5-A8-B1-A4-B3-A9-B7-A5-B2
• m) A1-B6-A3-B10-A7-B8-A2-B4-A5-B9-A10-B5-A8-B1-A4-B3-A9-B7-A6-B2.

A four-stroke reciprocating piston engine in a V configuration having 20 cylinders, having a crankshaft with a counter-clockwise or clockwise direction of rotation, having a flywheel arranged on the crankshaft, wherein the crankshaft has cranks which form a crank star and at which connecting rods of the cylinders engage, the V configuration comprising a plurality of V segments, each V segment comprising a respective pair of the cylinders oppositely disposed on the crankshaft from one another with the connecting rods of each V segment respectively engaging at a common crank,

• wherein the crank star is of a centrally symmetrical or quasi-centrally symmetrical design;
• wherein cranks C1 to C10 have one of the following sequences in the direction of rotation, viewed from a flywheel side, with the cranks being numbered in order along an axis of rotation of the crankshaft by C1 to C10 starting from the flywheel side:
• i) C1,10-C5,6-C2,9-C3,8-C4,7
• ii) C1,10-C4,7-C3,8-C2,9-C5,6
• iii) C1,10-C5,6-C3,8-C2,9-C4,7
• iv) C1,10-C5,6-C2,9-C4,7-C3,8.