Abstract: An induction pipe for internal combustion engines having a distributor section and supply lines for the mixture with the deflector having means therein to even the distribution of the mixture and the deflector being formed by a wall between the branch off points and also provided with recesses.

Abstract: A reciprocating internal combustion engine of the type having a continuous combustion. The combustion chamber must be connected with the cylinders of the engine by suitable transfer ports for supplying the gaseous medium to the cylinders and for discharging the burned mixture. In order to obtain a high efficiency the transfer ports should be as short as possible. This is accomplished by utilizing a piston of step-wise construction having a first surface for compressing the gas and a second surface which limits the gas expansion space. This makes it possible to arrange the combustion chamber adjacent to the cylinders between the compression and expansion space.

Abstract: A carburetor has a choke device formed of two planar quadrangular choke flaps situated side-by-side in a cross-sectionally quadrangular flow passage of an engine intake manifold. The pivotal supports for the choke flaps are held in recesses of the manifold wall and define a pivotal axis that lies in an edge zone of the choke flaps that is immediately adjacent the manifold wall. The choke flaps further have cooperating edge zones that together define the cross section of the flow passage as a function of pressure conditions in the intake manifold. In the fully open position, the choke flaps are in a face-to-face engagement with opposite wall portions of the intake manifold.