Hybrid Drive 2 - Toyota Prius II
The dimensions, organisation and even the form of the casing could point towards a gearbox with final drive in a transversely mounted engine. But, nevertheless, the internal design is very different,
also in comparison to an automatic gearbox. The hypoid drive takes over the task of the starter, generator and also that of the variable speed gearbox. In addition, a continuously variable
transmission develops. The acceleration attainable with the relatively small consumption-favourable internal combustion engine is improved a little by the implementation of aluminium and other
weight reduction materials and particularly by adding the electric motor. For the maximum speed the low air resistance of the vehicle pays off.
The engine is mounted below to the left and drives the planet wheel carrier of an easy planet set (green point). The rotor of the electric motor (red point) is connected with the hollow wheel of this
planetary gearbox and with the multiple chain going to the final drive. The generator 1 (blue point) is connected with the sun wheel.Prominent specific feature of the engine is the variable opening
angle of the intake valve, enabling a changeable compression of up to 13: 1. With it the engine can be driven consumption-favourably and be integrated almost indiscernibly into the power flow.
Also the SBC brakes are optimised to achieve a favourable consumption, because for light to middle braking not the brake, but the generator is activated initially.
This and the co-operation of the engines and generator is automatically controlled by computer. The only intervention possibility is the forcing of the electrical drive which is possible, however, only
under specific conditions (e.g., max. 45 km/h), and the engine brake during a mountain departure. All gear ratios develop from the co-operation of three main components, including the reverse
gear. This prevents at the moment the full summing-up of the torques of the internal combustion engine and the electrical motor, presumably in view of the subsequent power distribution. 06/08
|Weight of the battery||41 kg|
|Tension of the battery||200 V|
|Nominal voltage (electric motor)||500 V|
|Performance of the electric motor||50 kW|
|Torque of the electric motor||400 Nm|
|Max.-rev of the electric motor||10.000 rpm|
|Performance of the petrol engine||57 kW at 5.000 rpm|
|Torque of the petrol engine||115 Nm at 4.000 rpm|
|Cubic capacity of the petrol engine||1,5 liter|
|Weight of the petrol engine||86 kg|
|Acceleration 0 - 100 km/h||10,9 s|
|Top speed||170 km/h|