Importance

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Abstract

The present invention is directed to a vehicle motion control system for maintaining vehicle stability by controlling a braking force applied to each wheel of the vehicle. In the system, a control map setting unit is adapted to set plural control maps with an x-axis of a slip rate deviation between a desired slip rate and an actual slip rate, and a y-axis of a vehicle acceleration deviation between a vehicle acceleration and a wheel acceleration for each wheel, respectively. Each control map has an origin determined by the desired slip rate and the vehicle acceleration provided for each control mode. A pressure mode setting unit is adapted to set a pressure mode for a pressure control apparatus in each control mode. The pressure mode is set according to a location determined by the slip rate deviation and the vehicle acceleration deviation on the control map. A reference map setting unit is adapted to set a reference map with an x-axis of the slip rate and a y-axis of the vehicle acceleration. A pressure mode selection unit is adapted to select one of the plural pressure modes according to a predetermined priority, when the control maps are superimposed on the reference map to set the control modes for each wheel. The pressure control apparatus is adapted to control the hydraulic pressure in the wheel cylinder in accordance with the selected pressure mode.

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First Claim