A control system for a hybrid vehicle includes: an electric heater configured to heat a catalyst of an internal combustion engine; a position determination unit configured to determine whether the hybrid vehicle is located in an exit area of a low emission zone where operation of the internal combustion engine is supposed to be restricted, the exit area being an area adjacent to a boundary of the low emission zone; and a heater control unit configured to turn on the electric heater when the position determination unit determines that the hybrid vehicle is located in the exit area.

A method for operating a powertrain of a hybrid vehicle is provided. The method includes outputting via a controller an engine speed command that is based on a predicted impeller speed of a torque converter and corresponds to the accelerator tip-in to output a torque from the engine to wheels of the vehicle in response to detection of an accelerator pedal tip-in greater than a predetermined threshold. The method may also include accessing a history of impeller speed outputs of the hybrid vehicle to obtain the predicted impeller speed. The engine speed command may set engine speed substantially equal to or greater than the predicted impeller speed. The predetermined threshold may be based on a driver requested torque output of the wheels in which torque from the torque converter to the wheels results in saturation.

A control system for a hybrid vehicle includes: an electric heater configured to heat a catalyst of an internal combustion engine; a position determination unit configured to determine whether the hybrid vehicle is located in an exit area of a low emission zone where operation of the internal combustion engine is supposed to be restricted, the exit area being an area adjacent to a boundary of the low emission zone; and a heater control unit configured to turn on the electric heater when the position determination unit determines that the hybrid vehicle is located in the exit area.

The disclosure relates to a method for operating a drive train for a working machine, in which a working drive of the working machine is driven by a first electric motor via a first gear arrangement, a travel drive of the working machine is driven by a second electric motor via a second gear arrangement and, in a shifting procedure of the second gear arrangement, the rotational speed of the second electric motor is synchronised and the temperature of said second electric motor is recorded. In the disclosed method, the rotational speed is synchronised by supplying current to the second electric motor, and in the event of a threshold temperature being exceeded, at least one measure is carried out to relieve the thermal load of the second electric motor. The disclosure further relates to a corresponding drive train and to a working machine.

A vehicle is provided with a continuously variable transmission device and an electric control unit controlling an engine, a motor generator, and the continuously variable transmission device. The electric control unit selects any one of a plurality of operation modes, having different correlations between a driver's accelerator operation amount and a control throttle opening, to suit driver's requests, and performs a number-of-revolutions increase control for increasing an engine rotation speed according to at least one of elapsed time from a time point of a vehicle speed increase and elapsed time from a time point of an acceleration request in a case where the control throttle opening exceeds a predetermined threshold. The electric control unit controls the engine to suppress the engine rotation speed change due to a change of the operation mode in a case where the control throttle opening is changed across the predetermined threshold in response to the change of the operation mode.

A method for operating a powertrain of a hybrid vehicle is provided. The method includes outputting via a controller an engine speed command that is based on a predicted impeller speed of a torque converter and corresponds to the accelerator tip-in to output a torque from the engine to wheels of the vehicle in response to detection of an accelerator pedal tip-in greater than a predetermined threshold. The method may also include accessing a history of impeller speed outputs of the hybrid vehicle to obtain the predicted impeller speed. The engine speed command may set engine speed substantially equal to or greater than the predicted impeller speed. The predetermined threshold may be based on a driver requested torque output of the wheels in which torque from the torque converter to the wheels results in saturation.