PCT No. PCT/EP97/02341 Sec. 371 Date Feb. 13, 1998 Sec. 102(e) Date Feb. 13, 1998 PCT Filed May 7, 1997 PCT Pub. No. WO97/47860 PCT Pub. Date Dec. 18, 1997For a piston engine having a hypocycloidal piston stroke transmission with a Watt's guide, particularly having pistons in opposed cylinders, in which case the transmission is rotatably arranged on the crank pin of a crankshaft and comprises a stroke and a guide eccentric which are non-rotatably connected with one another, it is suggested for achieving the lowest transverse deviations of the stroke eccentric from the piston path that a path course 20 which is rendered uniform with respect to the transverse deviations INCREMENT qH of the stroke eccentric is achieved by means of a path course 21 of the guide eccentric achieved by way of parameters of the Watt's guide with maximal transverse deviations INCREMENT f up to and including the respective reversal point of the guide eccentric or of the Watt's connecting rod guiding it.
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