| 摘要 |
Included are a target speed setting section (29) and a speed control section (23). The target speed setting section (29) sets a target speed of an engine (2) to an idle speed that is lower than an input speed input with an engine control dial (13) when no operating signal is output from a control lever (9) over an predetermined period of time. The speed control section (23) controls speed of the engine (2) based on the target speed set by the target speed setting section. The target speed setting section (29) includes an idle speed setting section (42) that corrects the idle speed according to values detected by sensors (27, 28, 30) so that reduction in an output of the engine due to a change in a state quantity associated with an environment under which the engine is placed can be inhibited. This allows a good operating feel to be maintained during a reset from an auto idle state even with an engine output reduced according to a change in environment. |
