The machine combination of an internal combustion engine and the generator (41) of a hybrid drive has two cylinder-piston units, which are arranged parallel to each other in a common housing and each piston (3, 4) of which has a drive connection to an individual crankshaft via connecting rods (5, 6) associated with the pistons. The crankshafts have a counter-rotational connection to each other by means of one gear (9, 10) each. This coupling of the two crankshafts (7, 8) by means of gears (9, 10) allows the internal combustion engine to be combined with a generator in a particularly compact design, in that the shaft (44) of the generator bears a gear (45), which is arranged in the same plane as the gears (9, 10) of the crankshafts.
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