an engine,

a first motor,

a second motor,

a power splitting mechanism, and

a bypass mechanism;

wherein the power splitting mechanism comprises at least one planetary gear set, an input end, a first output end, and a second output end; the input end of the power splitting mechanism is connected with the engine; the first output end of the power splitting mechanism is connected with the first motor; the second output end of the power splitting mechanism is connected with a wheel of a vehicle; the second motor is connected with the wheel;

wherein the bypass mechanism is configured to engage the first output end of the power splitting mechanism with the second output end of the power splitting mechanism; the bypass mechanism comprises an engagement separation component; when the engine works, the bypass mechanism is disengaged from the power splitting mechanism, and power output by the engine is transmitted to the power splitting mechanism to drive the first output end and the second output end of the power splitting mechanism respectively; when the engine is not in work, the bypass mechanism is engaged with the power splitting mechanism, and power of the first motor is directly transmitted from the first output end of the power splitting mechanism to the second output end of the power splitting mechanism without transmitting through an interior of the power splitting mechanism;

wherein a speed ratio of the bypass mechanism from the first output end to the second output end of the power splitting mechanism is −K; where K is a ratio of a torque of the second output end of the power splitting mechanism to a torque of the first output end of the power splitting mechanism when the power output by the engine is split by the power splitting mechanism.