| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To increase safety in an emergency by assisting a driver's collision avoidance operation when there is a risk of collision with an obstruction ahead. <P>SOLUTION: When a danger signal DS of collision with an obstruction ahead is issued, in dependence on a size index S including the width W of the obstruction, a VGR mechanism 8 reduces a steering gear ratio G to produce a large steering angleβfrom a small steering operationα. The power steering assist force of a power steering system 9 is also increased to enable a steering operation for collision avoidance even from a small force. Braking force in the steering direction is further increased to enable a sharp vehicle turn even from the same steering operation. When the driver steers to avoid a collision, collision avoidance in the steering direction is made easy, while oversteering is prevented and drivability and safety are increased. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
