Drive ascent and descent possibly the job

摘要

PROBLEM TO BE SOLVED: To achieve the rotation condition of an engine suitable for the running condition without requiring a specific operation of an accelerator by improving the speed change operation structure.;SOLUTION: A speed change operator 53 of an infinite variable speed drive A for running and a speed governor mechanism 91 of the engine 12 are connected. When the speed change operator 53 is at a stop operation position where the running speed is zero, the speed governor mechanism 91 is operated in the low speed rotation condition. When the speed change operator 53 is operated in the running speed change range out of the stop operation position, the speed governor mechanism 91 interlocks with the operation and is automatically operated in the rotation condition at a higher speed than in the low speed rotation condition. The condition of the speed governor mechanism 91 is switched to the high speed rotation condition by applying the operation, different from the speed change operation for moving the speed change operator 53 to the running speed change range, to the speed change operator 53 while the speed governor mechanism 91 is kept at the stop operation position.;COPYRIGHT: (C)2003,JPO