Patent ID: 8701807

Claim:
A drive train system for a hybrid vehicle comprising an Internal Combustion Engine (ICE), an Electric Motor/Generator (EMG), the ICE being located upstream in the drive train system of the EMG, a Main Clutch (MC), the ICE being connected to the EMG via the MC, a mechanical transmission provided with at least one synchronized gear with a positive coupling, the mechanical transmission being located downstream of the EMG and upstream of end actuators, an Electronic Control Unit (ECU) for control of the drive train system, wherein the ECU is programmed to perform a control sequence comprising: a) Setting the drive train system in a generating mode when the vehicle is at standstill with its ICE running and a signal is provided to the ECU indicating that electric generation is desired, the generating mode including setting the MC to be engaged so that the EMG rotates in a generating mode and decoupling the end actuators by setting the mechanical transmission in neutral mode by disengaging a synchronization arrangement of the at least one synchronized gear; b) Preparing a control sequence for a change of driving mode from idle to driving in response to a signal to the ECU indicating that motion of the vehicle is desired; c) Disengaging the MC so that the ICE and EMG are disengaged from each other and engaging the synchronization arrangement of the at least one synchronized gear, and thereby transmitting a torque from the EMG and associated rotating axles to the end actuators while the EMG slows down due to the engagement with the mechanical transmission and the end actuators; d) Engaging the positive coupling of the synchronized gear when a rotational speed of the EMG and the shaft connected to the end actuators are synchronized.