To prevent an engine stall when an engine is switched from forward to reverse for braking by providing an intake quantity adjusting valve adjusting the intake quantity while a throttle valve is nearly fully closed and an intake quantity control means controlling the intake quantity adjusted by the intake quantity adjusting valve based on the state of an operation lever.
When a throttle valve 17 is opened, no feedback control is applied to an idle engine speed adjusting valve 60, the opening of the adjusting valve 60 is kept at the initial set value (opening to open 1/2, of a by-pass passage 61), and the normal operation corresponding to the throttle valve opening is continued. When the throttle valve 17 is fully closed and the lever speed of an operation lever 16 is larger than the set value at the timing immediately before reverse clutch-in, a computer judges that a hull braking action is taken, and it opens the idle engine speed adjusting valve 60 to control the engine speed to the brake engine speed. When the elapsed time after the braking operation becomes larger than the set value, the opening of the idle engine speed adjusting valve 60 is returned to the prescribed idling opening.
JP5379746 | Outboard motor control device |
WO/2022/191503 | ENGINE OUTPUT ADJUSTING SYSTEM, AND SHIP COMPRISING SAME |
WO/2011/122375 | MARINE ENGINE CONTROL DEVICE AND METHOD |
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