| 摘要 |
PURPOSE: A control method for a brake force by using a shift down of a continuously variable transmission vehicle is provided to improve safety by converting a general travel range to a sports travel range regardless of manipulation of selector lever and sufficiently securing the brake force upon a sudden brake. CONSTITUTION: A continuously variable transmission is composed of primary and secondary pulleys, a belt, a DC motor, a torque cam and a spring. The belt is contacted between the primary and secondary pulleys. The DC motor controls the relative clearance of a variable pulley to vary the contacted inner diameter of the primary pulley. The torque cam carries out the variation of the contacted inner diameter of the secondary pulley to correspond to the change of the inner diameter of the primary pulley. Herein, the continuously variable transmission is additionally prepared with a sensor for sensing a decelerated speed value upon a sudden brake and a logic circuit for regulating to a speed changing rate of a sports travel range without moving a selector lever by controlling the DC motor.
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