Presentation of the concept of stability of the hybrid powertrain by the Lyapunov theory

The paper presents an algorithm for controlling a hybrid drive system equipped with an internal combustion engine and electric motor. Work algorithm provides basic control of the petrol engine as the primary energy source. The internal combustion engine control system adopted an adaptive control system, which taking into account the stability of the system by Lyapunov allows for optimum combustion engine and electric motor. The direct method by Lyapunov stability analysis allows one to assess the stability of the whole system of hybrid propulsion system of a wheeled vehicle