Patent ID: 7774108

Claim:
A front and rear wheel drive vehicle having a front wheel pair and a rear wheel pair, one of which is driven with an engine and the other one of which is driven with a motor, comprising: means for setting a target engine driving force of the engine based on driving conditions of the vehicle; means for setting a target motor driving force of the motor based on driving conditions of the vehicle; and means for incrementally controlling a rate of change from an actual engine driving force toward the target engine driving force, and a rate of change from an actual motor driving force toward the target motor driving force, wherein said incremental control occurs when the target engine driving force increases and the target motor driving force decreases or when the target engine driving force decreases and the target motor driving force increases, wherein when an engine slope control step value based on a sampling interval of the change in the target engine driving force is equal to or lower than a motor slope control step value based on a sampling interval of the change in the target motor driving force, an engine control value equal to the change amount of the target engine driving force divided by the motor slope control step value is incrementally added to an actual engine driving force command value to control the rate of change from the actual engine driving force toward the target engine driving force, and wherein when the engine slope control step value is greater than the motor slope control step value, a motor control value equal to the change amount of the target motor driving force divided by the engine slope control step value is incrementally added to an actual motor driving force command value to control the rate of change from the actual motor driving force toward the target motor driving force.