| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve the problems of taking much time to reach an intended vehicle speed and of poor fuel efficiency with excessive fuel consumption that a tractor or the like faces when running on the road with the engine revolution set and sustained by use of the accelerator pedal or lever. <P>SOLUTION: A tractor is provided with an accelerator pedal keeping a set position, a motor for adjusting the position of the control rack that regulates engine output revolution, and a power roller that regulates the revolution of a troidal type continuously variable transmission device. A variable transmission mode selection lever 7 is also provided for setting the vehicle speed mode at the "work" or "run" position. In the case where the selector lever 7 is in the "work" position when the accelerator pedal is operated, the revolution of the transmission device is adjusted while the engine revolution is kept roughly constant. When the selector lever 7 is in the "run" position, an adjustment is conducted by properly linking the revolution of the engine and that of the transmission device 2. The maximum speed is set for both the "work" and "run" positions. <P>COPYRIGHT: (C)2009,JPO&INPIT |
