The following also applies for the Hüttlin-Kugelmotor®:

Only a three-dimensional spatial shape can provide a relatively large cubic capacity within proportionally small dimensions.
An additional technical shape and design optimization of existing engine systems according to Otto and Diesel will not be able to achieve the desired breakout. Thereby, it would only become more complicated and expensive.
Completely according to the motto: “The light bulb is not a result of advancing the wax candle”, Herbert Hüttlin started working again.
The spherical form with its circularity in all 3 directions!

The Hüttlin-Kugelmotor® is made up internally of a so-called piston rotor that is equipped with 2 curved, offset at 90°, radial, elbow-shaped circular cross section chambers. A total of 4, equally so elbow-shaped circular cross section rotors continually alternate and move towards and away from each other in a symmetrical and paired way. The paired piston motions, also called breathing motions, are generated through the functional unity with the piston-connected guide roller, while these glide along the somewhat orthogonal contact surface of the curve element on the system axle. Thereby, rotation in the internal engine is generated and the deconvolution of the torsional.
The piston rotor (also called the internal engine) features a gear ring on one or both front sides. The drive and/or output shaft respectively, which is positioned parallel to the system axle, is driven by this gear ring.
The piston rotor with its 4 pistons (also called internal engine) rotates inside the casing, which is spherical on the inside, on its system axle.
On both front sides of the housing, fresh mixture intake, exhaust discharge, fuel injection as well as spark or glow plugs can be found. These correspond optimally to each of the breathing openings of the two 90° combustion chambers set together, which are inserted in the head piece of the piston rotor.
The bent, yet spherical pistons and piston rings correspond to a large extent to today's established standards of technology. They are the integrated components of a consequent spherical form orientated, three dimensional engine kinematics.
The technical highlights of the Hüttlin-Kugelmotor® are displayed as follows:

• its spherical shape;
• two combustion chambers (work chambers) arranged on the system axle;
• two bent piston pairs circular cross-sections (moving towards and away from each other in pairs);
• the simple designed axial functioning gasket system (for fresh mixture intake and/or exhaust discharge on the piston rotor heads);
• a drive-output shaft arranged parallel to the drive and/or system axle (connected to the rotating internal engine by means of intermeshing gears).

The characteristics of the Hüttlin-Kugelmotor® is comparable to those of a four-cylinder Otto or Diesel engine - ignition takes place every 180°, meaning a power stroke.
During a full 360° rotation of the internal motor on the system axle, two complete cycles will take place, in which the chambers work alternately.
In comparison to a conventional internal combustion piston engine, the mechanical basis of a Hüttlin-Kugelmotor® is made up of fewer components.
Additional fixtures and fittings are represented as follows:

• Oil cooling and lubrication system with oil pump, cooler and filter;
• a circulating air cooling system with fan for the internal engine;
• a water cooling system for the housing cover (front side);
• a fresh mixture management.

Exhaust management with catalytic converter and carbon-particulate filter, respectively