The Prototype Description:
The prototype is made of two single-cylinder four-stroke engines of Honda PCX 150 scooters. Its engine block is made by welding two original engine blocks together. Crank mechanisms are modified and fitted with gears to synchronize their rotation. The crank mechanisms and camshafts are balanced according to the requirements of our patented configuration. The cylinders, heads and valve trains are original. The engines factory default configuration is a three-phases generator with permanent magnets in the rotor, which is mounted on the crankshaft. This generator is used to supply a 12V engine wiring system. This generator is also used as the engine starter.
It is important to note that the symmetrical design of the technical solution of the motor-generator according to our patent solves all problems with balancing of all components connected to the crank mechanism. For example, balancing the general planar motion of the connecting rod.
We would also like to highlight that there are eccentric crank mechanisms in which the movement of components have a more complicated mathematical expression. These crank mechanisms are also more difficult to balance, especially in single-cylinder designs. In the case of our prototype, the eccentricity is 6.5mm. Again, thanks to the symmetrical design, all inertial forces are perfectly compensated also for this specific crank mechanism design.
The prototype has two separate electrical circuits i.e., two engine control unit, two generators, (each generator has its own load in the form of heating tubes) etc… Thanks to this separate wiring, we can simulate various scenarios of operation, including fault conditions such as ignition failure or generator failure and their effect on vibration generation.
Prototype Parameters:
| Max power: | 2 x 10 kW / 13k at 8500 rpm |
| Torque: | 2 x 14 Nm at 5250 rpm |
| Bore and Stroke: | 58.0 x 57.9 mm |
| Volume: | 2 x 153 ccm |
| Compression ration: | 10.6 / 1 |
| Eccentricity of crank mechanism: | 6.5 mm |
| Valvetrain: | Two valves SOHC |
| Max power of generator: | 2 x 8 kW |
| Electronic control fuel injection and ignition system. |
Selected views and sections of the 3D model of the Prototype
