| 摘要 |
PROBLEM TO BE SOLVED: To smoothly perform engine output resumption, and prevent engine degrading, when switching is conducted from a low fuel consumption mode to a standard mode. SOLUTION: A tractor is configured so that switching between a standard mode line L1 and a low fuel consumption mode line L2 is carried out by a fuel consumption mode change means 36. While the low fuel consumption mode line L2 is selected, and when switching is performed from the low fuel consumption mode line L2 to the standard mode line L1 by operating the fuel consumption mode change means 36, although performance curve switched to the standard mode line L1, the injection timing (advance angle) of the low fuel consumption mode line L2 is maintained until a load ratio in the standard mode line L1 reaches a predetermined value. COPYRIGHT: (C)2011,JPO&INPIT
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