| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a management machine having a control function capable of surely avoiding engine failure. <P>SOLUTION: A first velocity instruction value C1 and a velocity ratio (Vact/Vset) are read into an instruction value conversion part 61, and a second velocity instruction value C2 is outputted by operation of (Vact/Vset)×C1=C2. A rotating speed of the output shaft 47L of a left hydraulic transmission 22L is detected by a traveling speed detection means 52L. A left transmission control part 62L compares the actual rotating speed detected by the detection means 52L with the second velocity instruction value C2, and drives a control motor 48L through a motor driver 63L so that the actual rotating speed gets close to the second velocity instruction value C2. The same operation is performed in a right transmission control part 62R. According to this, the second velocity instruction value is smaller as the load to the engine is larger. Consequently, engine failure can be avoided. Further, the traveling speed is automatically controlled according to the engine load without needing a worker's decelerating operation. <P>COPYRIGHT: (C)2007,JPO&INPIT |
