Subaru LEGACY 2002 - 2. Operation Principle of VDC

VDC
VEHICLE DYNAMICS CONTROL (VDC) SYSTEM
VDC-3
B: OPERATION PRINCIPLE OF VDC
1. OVERSTEER SUPPRESSION
When the vehicle starts to spin during cornering, the VDC control module (VDCCM) actuates the
brakes on the front and rear outer wheels. As a result, a force that counteracts the oversteer-caus-
ing yaw moment is generated so that the vehicle’s behavior is stabilized.
2. UNDERSTEER SUPPRESSION
When the vehicle starts to drift outward during cornering, the VDCCM causes the rear inner wheel
to be braked. As a result, a force that counteracts the understeer-causing yaw moment is gener-
ated so that the vehicle’s behavior is stabilized.
(1) Braking force
(2) Oversteer-causing yaw moment
(1) Braking force
(2) Understeer-causing yaw moment
(2)
(1)
B4H1634B
(2)
(1)
B4H1635B