Patent ID: 8108106

Claim:
A motion control system for a vehicle, comprising: at least one front wheel side suspension that is provided to front left and right wheels of the vehicle and has an anti-dive geometry; at least one rear wheel side suspension that is provided to rear left and right wheels of the vehicle and has an anti-lift geometry; a brake control apparatus that is operable to independently apply and control brake forces at the front left and right wheels and the rear left and right wheels, respectively; and a first roll limiting control means for controlling the brake control apparatus during steering operation of a steering operating member of the vehicle by a driver from a straight-ahead driving state of the vehicle in a non-operating period of a brake operating member of the vehicle by the driver, wherein: the first roll limiting control means controls the brake control apparatus such that the brake force is applied to at least one of a radially outer one of the front left and right wheels which is located on an outer side in a radial direction of an arc of turn of the vehicle upon starting the steering operation, and a radially inner one of the rear left and right wheels, which is located on an inner side in the radial direction of the arc of the turn, while a sum of the brake force of the radially outer one of the front left and right wheels and the brake force of the radially inner one of the rear left and right wheels is equal to or smaller than a predetermined value; the first roll limiting control means starts the controlling of the brake control apparatus when a rate of change in an amount of operation of the steering operating member in the non-operating period of the brake operating member becomes larger than a predetermined rate; the first roll limiting control means terminates the controlling of the brake control apparatus when an angular acceleration of a roll angle of a vehicle body of the vehicle is changed from a positive range to a negative range; and the roll angle of the vehicle body is defined such that when a radially outer side of the vehicle body, which is located on the outer side in the radial direction of the arc of the turn, is tilted downward, the roll angle of the vehicle body is in the positive range.