PROPELLING DEVICE FOR VESSEL

摘要

PROBLEM TO BE SOLVED: To prevent an internal combustion engine from easy engine stop even in the case of switching to a reverse rotation driving condition through a neutral condition during high-speed progressing operation in the condition wherein a propeller is driven for normal rotation.

SOLUTION: A vessel 1 is provided with an ISC valve 22 for adjusting opening of a secondary air passage 21 communicated with an intake passage 18 provided downstream of a throttle valve 20, and provided with a control device 25 for controlling valve opening operation of the ISC valve 22 so that the internal combustion engine 13 is rotated at a target rotating speed when operating the throttle valve 20 to be quickly closed. A second target rotating number R2 of the internal combustion engine 13 in the case wherein the propeller 11 is in the neutral condition N and the ISC valve 22 is controlled by the control device 25 is set to be higher than the first target rotating speed R1 of the internal combustion engine 13 in the case wherein the propeller 11 is in the normal rotation driving condition A and the ISC valve 22 is controlled by the control device 25.

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