(57) Piston combustion engine characterised in that the basic engine unit is formed by
a pair of cylinders 1, 2 with separate combustion chambers 12, 13, connected with
each other by means of at least one through-conduit 7, arranged at a height between
the bottom dead centre of the piston and the top dead centre of the piston of each
of the cylinders forming a pair, wherein the intake port of the through-conduit may
be arranged at a different height than the exhaust port of that conduit, whereby one
of the cylinders of the pair comprises at least one intake port 8, and the other of
the cylinders of the pair comprises at least one exhaust port, and yet further, the
working cycle of one piston is shifted in phase relative to the cycle of the other
piston by an angle α ≥ 0°. The engine may include more than one basic unit, forming
a pair.
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