| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To solve such a problem that engine stall is susceptible to occurrence when a control for keeping an engine speed is performed, while an engine output curve with low fuel consumption in which a fuel consumption rate is decreased to be lower than a normal consumption rate. <P>SOLUTION: In structure of an engine control device for a tractor, a mode is switched to an engine speed fluctuation control mode A in travelling of the tractor, and both selection of a standard engine output curve N by a mode selecting means 134 and an on state of a PTO driving means 151 driving a working machine installed to the tractor are validated to switch the mode to an engine speed maintaining control mode B. Further, both selection of an engine output curve S with low-fuel consumption by the mode selecting means 134 and the on-state of the PTO driving means 151 driving the working machine are validated to switch the mode to the engine speed fluctuation control mode A. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
