The monocylindrical hybrid powertrain comprises a continuously variable volume hybrid engine, pump and hydrostatic motor. The pump plunger fastened to engine piston and the engine cylinder fastened to the hydrostatic motor by valve plate and formed solid monoblock.
The hybrid synchronize mechanism swash plate turn changes the engine piston stroke and remains the engine compression ratio. The swash plate shift changes the engine compression ratio for the either kind of fuel use.
The hybrid and pneumohydraulic accumulator association transforms the single pump plunger supply pulsation into uniform fluid flow feeding the hydrostatic motor.
The hydrostatic motor and the electric motor association allow electric energy accumulation by means of plug-in.
Direct energy transmission, variable displacement volume engine, pump and hydrostatic motor and energy recuperation increases the specific power, decreases the weight and installation space and enables to achieve 80 mile per gallon for the car in city conditions.