| 摘要 |
<p>PURPOSE:To prevent quick acceleration if any wrong trolling operation is performed by enabling a hydraulic clutch to be disengaged if the semi-engaged state can not be allowed. CONSTITUTION:When an engine r.p.m 34 is higher than the first limit value TH1 (the maximum r.p.m by which a semi-engaged state is allowed) and lower than the second limit value TH2 set higher than the limit value TH1, a clutch actuator 5 is controlled as to have a clutch 31 to be placed in the neutral gear state (with oil pressure at zero), hence stopping revolution of a propeller. Therefore, even if the operator performs a wrong operation so that an engine r.p.m exceeds the first limit value TH1 when he desires a trolling operation, it will not exceed the second limit value TH2 in many cases. Consequently, it can be prevented that a fish herd runs away due to quick acceleration.</p> |
