Abstract: The exhaust gases of both cylinder banks of a multi-cylinder reciprocating engine first flow through a catalyst situated along the respective cylinder bank and then, in a cross countercurrent, flow through a horizontally situated muffler arranged transversely to the cylinder banks.

Abstract: The air intake system of an internal-combustion engine has a branching between the throttle housing and a collecting tank from which suction pipes lead to the cylinder head of the internal-combustion engine. This branching divides the intake air which flows into it in a single flow and guides it to the collecting tank by way of several lines. This arrangement has a simple construction and causes a torque and power increase over a wide rotational-speed range.

Abstract: An intake pipe system for an opposed-piston or V-engine consists of a U-shaped collector intake pipe at whose two U-legs individual intake pipes are mounted to the two banks of cylinders. In the center between the U-legs, an intake stub is mounted that points in the same direction. In order to achieve an optimal charging effect, the total length of the collector intake pipe amounts to twice the total length of the individual intake pipe that is designed as a curve with respect to space.

Abstract: A suction system to an inlet valve of a reciprocating piston internal combustion engine consists of a suction line adapted to be closed by a closure valve and of a by-pass line by-passing the closure valve. A check valve is inserted into the by-pass line which is formed by slots in the suction line and spring lamellae covering the same from the outside. In order to reduce throttle losses and to permit a dynamic charging effect to become effective, the closure valve is fully opened at rotational speeds above 3,500 rpm.

Abstract: A turbosupercharging system is provided having two turbosuperchargers of the same type and dimensions, connected in parallel. A cut-in valve is installed in an exhaust manifold in which the second turbine is installed. When the valve is closed, the entire exhaust blast coming from the engine is directed to the first turbine. In this manner, even at low engine speeds, the first turbine can deliver an effective amount of power to its compressor, thereby introducing a detectable supercharge into the cylinders of the internal combustion engine. This supercharge also holds a biased nonreturn valve which is built into the manifold pressure line of the second tubosupercharger is a closed position. When the cut-in valve is completely open the exhaust blast is divided between both turbines, thereby allowing a pressure build up in the manifold pressure line of the second turbosupercharger.

Abstract: An air intake installation of a multicylinder internal combustion engine in which, for purposes of tuned-intake pressure-charging, a common air intake installation is arranged between two cylinder groups of a multicylinder internal combustion engine whose cylinders are in boxer or V-type arrangement; the air intake installation which is disposed symmetrically to the cylinder groups has its volumes and lengths so matched to the internal combustion engine that a good charging effect results from tuned-intake pressure-charging over a large rotational speed range of the engine.

Abstract: An air intake installation of an internal combustion engine consisting of an I-shaped distributor member which is formed of two resonant chamber and of a connecting pipe connected to the air filter. Two bypass pipes are additionally located between the two resonant chamber in parallel with the connecting pipe, of which one is also connected with the air filter by way of an intake connection. The other bypass pipe and the connecting pipe are adapted to be closed off with respect to the resonant chamber by way of throttle valves located near the ends of the connecting pipe and of the other bypass pipe. By corresponding actuation and adjustment of the throttle valves, the connecting cross sections between the resonant chambers which effect the resonance can be adjusted in three stages and the resonance point can be displaced correspondingly into different rotational speed ranges.

Abstract: An air intake manifold arrangement is provided for an internal combustion engine of boxer or V-type having two similar groups of cylinders. The manifold I formed as an I-shaped distribution piece with a straight connecting pipe connecting two resonance chambers. A suction connection fitting is perpendicular to and opens into the connecting pipe with a single opening. Individual suction pipes extend parallel to the connecting pipe and outwardly of the respective resonance chambers to respective ones of the cylinders.