To provide an electric steering control device, which restricts deviation of a vehicle in the case where there is forward-backward force difference between the right and the left wheels because of actuation of anti-skid control or traction control on a μ-split road surface while the vehicle is turning.
On a road where the vehicle is traveling, on which right and left road surface friction coefficients differ, a target turning state quantity is computed (M8) based on a turning state when at least either of the anti-skid control and the traction control is actuated. Based on deviation between the target turning state quantity and actual turning state quantity, and on the forward/backward force difference, a counter steering additional torque target value is computed (M5). It is added to a power steering auxiliary torque target value, and a command value to drive an electric motor MT is determined.
COPYRIGHT: (C)2008,JPO&INPIT
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KODAMA HIROYUKI
ASANO KENJI
KATO HIRAHISA
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