| 摘要 |
<p>PURPOSE:To prevent the variation of transmission ratio against the driver's will and to improve the handling property by composing the system regulate the transmission ratio variation by a transmission ratio control device of the steering system, which is resulting from the actual car speed, when a constant speed control device is in the operational condition. CONSTITUTION:When the car speed setting instruction is given by a car speed setting device 3, the car speed detected by a car speed sensor 4 is made as an object car speed in a constant speed control device 1, and the output of an engine 6 is controlled through an actuator driving circuit 5 to maintain the object car speed. Furthermore, a control amount as to the transmission ratio responding to the actual car speed by the car speed sensor 4 and the handle steering angle by a handle steering angle sensor 7 is computed in a transmission ratio control device 2, and a transmission ratio variable mechanism 8 furnished in the steering system is controlled. However, when the constant speed control operation condition is detected in this case, the transmission ratio control by the transmission ratio control device 2 depending on the actual car speed is regulated by a regulating device 9.</p> |
