Patent ID: 7917264

Claim:
A seat apparatus for a vehicle for controlling a side support portion depending on a road condition, comprising: a linear distance calculating means for calculating a linear distance of a straight portion between a first curve, on which a vehicle travels first, and a second curve, on which the vehicle travels following the first curve, based on an electronic map data; a curve controlling level calculating means for calculating a curve controlling level, which corresponds to a controlling level for the side support portion at the first curve; a linear portion controlling level calculating means for calculating a linear portion controlling level, which corresponds to a controlling level for the side support portion on the straight portion, on the basis of the linear distance and the curve controlling level; and a driving means for driving the side support portion based on the curve controlling level and the linear portion controlling level, wherein the curve controlling level is calculated at the curve controlling level calculating means from an output value of a lateral acceleration sensor, and the linear portion controlling level is calculated at the linear portion controlling level calculating means by multiplying a maximum curve controlling level out of a plurality of curve controlling levels calculated by the curve controlling calculating means at the first curve by a supporting rate that becomes greater as the linear distance becomes shorter.