Vehicle motion control system

Abstract

There is provided a vehicle motion control system which carries out acceleration and deceleration of a vehicle which satisfies driving feeling of a driver even in the state where a lateral motion of the vehicle is not involved. The vehicle motion control system includes a curve shape acquisition section 2 for acquiring a curve shape ahead of an own vehicle, an own vehicle position acquisition section 3 for acquiring a position of the own vehicle, and a vehicle motion control calculation section 4 for calculating a command value of a longitudinal acceleration generated for the vehicle based on the curve shape and the position of the own vehicle. The vehicle motion control calculation section 4 calculates a plurality of negative longitudinal acceleration command values during travel of the own vehicle from before a curve to a point where a curve curvature becomes constant or maximum after the vehicle enters into the curve. The longitudinal acceleration command values are changed based on at least one of: an estimate of the maximum lateral acceleration which is presumably generated during traveling a curve ahead of the own vehicle; a grade of the road ahead of the own vehicle, pedal operation by the driver, and a turning direction.

Description

technical field [0001] The present invention relates to a vehicle motion control device, and more particularly to a vehicle motion control device that accelerates and decelerates a vehicle in order to make the motion state of the vehicle appropriate. Background technique [0002] Conventionally, there is known a system that decelerates when the lateral acceleration generated by the vehicle exceeds a set value based on curved road information from a navigation system and lateral acceleration when turning (for example, Patent Document 1). [0003] In this device, in order to prevent the magnitude of the lateral acceleration generated when passing a curved road from becoming more than a set value, the target vehicle when traveling on a curved road is set based on a preset lateral acceleration set value and the curvature of the curved road ahead of the vehicle. Speed, based on the target vehicle speed and the actual vehicle speed, the necessary deceleration is made. This method...

AI Technical Summary

Problems solved by technology

[0013] However, the method of making the acceleration and deceleration based on the lateral jerk is when the vehicle generates lateral motion, and the method of making the acceleration and deceleration associated with the lateral motion, such as deceleration before entering a curved road or on a straight line, does not occur on the vehicle. The deceleration in the state of lateral movement cannot be set

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