CONTROL APPARATUS OF 4 WHEEL DRIVING VEHICLE

摘要

PURPOSE: A control device of a 4 wheel drive vehicle is provided to distribute driving force to four wheels by implementing correction corresponding to rotary difference due to air pressure difference between tires. CONSTITUTION: A control device of a 4 wheel drive vehicle comprises a speed change part(110), a transfer case part(120), tire pressure sensors(130) and an electronic control unit(140). The transfer case part receives speed-changed driving power from the speed change part and selectively provides the same to a rear driving shaft and a front driving shaft. The electronic control unit calculates the number of rotations(rpm) of the corresponding wheel through the measured value of the air pressure of the tire. The electronic control unit determines the difference in revolving speeds for corresponding wheels by comparing calculated rotation numbers to real rotation numbers.