The present invention relates to a rotary engine comprising a stator, a first rotor rotatably mounted on the stator about a rotational axis of the first rotor, and a second rotor rotatably mounted on the stator about a rotational axis of the second rotor parallel to the rotational axis of the first rotor such that the second rotor is eccentrically mounted to and surrounding the first rotor, wherein the first rotor comprises a first cylinder with a piston chamber limited by a translationally displaceable first piston with a first rod fixed to an outer side of the second rotor on an end of the first rod outwardly projecting from the first cylinder towards the outer side of the second rotor and fixed to the first piston on the other end of the first rod, wherein the first rotor further comprises at least one second cylinder, each of the at least one second cylinder comprising a piston chamber limited by a translationally displaceable second piston with a second rod coupled to an outer side of the second rotor on an end of the corresponding second rod outwardly projecting from the respective second cylinder towards the outer side of the second rotor and fixed to the corresponding second piston on the other end of the corresponding second rod, and wherein the end of each second rod coupled to the outer side of the second rotor is supported such that the end is rotationally displaceable along a limited curved guide path within the second rotor.

A four-stroke rotary-piston engine has an outer disk, and inner disk, at least one cylinder, at least one piston, at least one piston rod, a fixed gear engaged with a planet gear and a rotary gate valve positioned at a head of the cylinder. The inner disk is rotatable with respect to the outer disk by a compression control device. The planet gear rotates a crank situated on a shaft thereof. The shaft passes upwardly through the inner disk. The crank reciprocates a lever via the piston rod. The lever has an end pivoted on the outer disk so as to push the piston into and out of the cylinder.

The present invention relates to a rotary engine comprising a stator, a first rotor rotatably mounted on the stator about a rotational axis of the first rotor, and a second rotor rotatably mounted on the stator about a rotational axis of the second rotor parallel to the rotational axis of the first rotor such that the second rotor is eccentrically mounted to and surrounding the first rotor, wherein the first rotor comprises a first cylinder with a piston chamber limited by a translationally displaceable first piston with a first rod fixed to an outer side of the second rotor on an end of the first rod outwardly projecting from the first cylinder towards the outer side of the second rotor and fixed to the first piston on the other end of the first rod, wherein the first rotor further comprises at least one second cylinder, each of the at least one second cylinder comprising a piston chamber limited by a translationally displaceable second piston with a second rod coupled to an outer side of the second rotor on an end of the corresponding second rod outwardly projecting from the respective second cylinder towards the outer side of the second rotor and fixed to the corresponding second piston on the other end of the corresponding second rod, and wherein the end of each second rod coupled to the outer side of the second rotor is supported such that the end is rotationally displaceable along a limited curved guide path within the second rotor.

An internal combustion engine is provided using parts that can be produced simply and inexpensively, in which internal combustion engine the fuel is burned optimally by adjustments of compression ratio and valve control times and thus the least possible harmful exhaust gases are emitted while maximum effective power is achieved. Furthermore, all liquid and gaseous fuels can be used.

A hybrid drive system for a motor vehicle, and a method for operating a motor vehicle. The hybrid drive system includes an amplidyne-type generator and a counterpoise engine to provide the power required for charging the storage batteries and providing supplemental drive energy (acceleration) to the motor vehicle.