| 摘要 |
PURPOSE:To prevent fatigue during long period driving by gradually reducing the manual steering torque to a predetermined limit in the constant car speed traveling on a freeway on which the nearly constant high speed traveling is frequently performed. CONSTITUTION:A union 32 having a throttle hole 32a at the center is coaxially screw-fixed at the top edge of the projection part 31a of the valve body 31 of an electromagnetic control valve 30, and the first and second ports 30a and 30b are formed, setting the throttle hole 32a interposed. A spool 33 and a valve shaft 34 are installed in a valve body are elastically supported between the valve body 31 and an adjusting screw 37 screwed with a yoke 35. If a solenoid 36 does not conduct, the top edge of the valve shaft 34 is separated from the throttle hole 32a of the union 32, and the electromagnetic control valve 30 is perfectly opened, while if the solenoid conducts, the opening degree is reduced. When the car speed is over 80km/hr and the variation of the car speed is within 2km/hr, the control electric current value applied onto the solenoid valve 30 is reduced by about 10%, and the light handle operation is secured.
|
