| abstract |
When an engine (8) is driven on a different type of fuel (for example, ethanol-containing fuel) from a reference fuel (for example, gasoline) and the engine torque (TE) is thus greater than that produced when the engine (8) is driven on the reference fuel, a differential state control device (88) expands a non-differential range compared to that at the time when the reference fuel is used. Thus, in the case where a plurality of types of fuel including the reference fuel are supplied to the engine (8), the advantage of switching a power distribution mechanism (16) between a differential enabled state and a non-differential state can be fully utilized in correspondence with engine torque characteristics which may vary in accordance with the type of fuel for the engine (8). As a result, the fuel consumption rate can be reduced in correspondence with the plurality of types of fuel supplied to the engine (8), for example. |