Mitsubishi Motors Announces
ALL WHEEL CONTROL SYSTEM
"AYC"&"ASC"

Enhances cornering safety & driving fun

[ AYC&ASC | ASC Profile ]

AYC Profile

1.Benefits of AYC

• AYC, even in very sharp corners, ensures that the vehicle faithfully obeys steering input, that accelerator input produces practically no disturbance in body attitude and that steering corrections are minimized so that the vehicle traces the line the driver wishes to take.
  
• AYC helps equalize the loading on the four tires,thereby elevating the cornering performance limits of four-wheel drive vehicles.
  
• AYC eliminates the braking feel experienced when breaking force engine output are regulated and enables the driver to steer the line he chooses.
  
• AYC enhances four-wheel drive go-anywhere ability enabling smooth and powerful starts on slippery surfaces by transferring drive torque to the wheels with most traction.
  

2.System

• The AYC system computer uses sensor information on steering wheel angle and throttle opening to determine how the driver is operating his vehicle, and sensor information on vehicle wheel rotational speed,longitudinal G and lateral G to determine vehicle body attitude. From this information, the computer then determines the amount of torque that needs to be transferred between the wheels in order to bring vehicle body attitude as close to the ideal as possible.
  

• The AYC system pump receives signals from the computer and supplies the Torque Transfer Differential with the appropriate hydraulic pressure.
  
• Attached to the rear axle of 4WD vehicles, the Torque Transfer Differential transfers drive torque between the right and left wheels and thereby generates the appropriate yaw moment about the vehicle body's center of gravity.
  

3.Torque transfer differential

The Torque Transfer Differential comprises: (1) A Gear Mechanism which generates, inside differential, two differing rotational speeds which are 'fast" or "slow" relative to the rotational speed of the differential case and; (2) A Left/Right Clutch Which employs the differential in the rotational speeds in (1) to transfer is able to transfer drive torque between the left and right wheels at will and with practically no energy losses; something not possible in conventional limited slip differentials (LSD).

1.Shifting torque to the right When the right clutch is engaged while letting it slip, torque in proportion t o the degree of engagement is shifted from the "leading shaft, " which has the faster rotation, to the right-wheel drive axle, which has the slower rotation, thereby increasing torque to the right wheel and decreasing torque to the lef t wheel.	2.Shifting torque to the left When the left clutch is engaged, the torque is shifted from the right-wheel dr ive axle, which has the faster rotation, to the "lagging shaft," which has the lower rotation, resulting in decreasing the torque to the right wheel and inc reasing torque to the left wheel.

Copyright 1996 by Mitsubishi Motors Corporation.