Abstract: The disclosure relates to an internal combustion engine (1) with at least one double cylinder (2), in which two inner pistons (6) and two outer pistons (7) are arranged such that they reciprocate in the double cylinder (2) by at least one respective inner connecting rod (8) or a respective first outer connecting rod (11a) and a respective second outer connecting rod (11b) with the aid of a crankshaft (4). The present disclosure provides an internal combustion engine (1) in which the outer connecting rods do not pivot. The two first outer connecting rods (11a) of the two outer pistons (7) are coaxial and integrally formed; and the two second outer connecting rods (11b) are coaxial and integrally formed.

Abstract: A method and a device for water recovery from exhaust gas is disclosed. The exhaust gas flows into an exhaust gas chamber. Water molecules in the exhaust gas are extracted into a tube system via a molecular sieve. Water molecules in a vapor state are then condensed in a condenser. The exhaust gas flow is controlled by a valve at the end of the exhaust chamber. The method and device allow the greatest possible proportion of water to be recovered from the exhaust gas in a simple way.