Control apparatus for a marine engine

Details Control apparatus for a marine engine Control apparatus for a marine engine

1993-12-15

1994-11-15

Wright, Dirk

Interrelated power delivery controls, including engine control

Transmission control

Engine controlled by transmission

F16H 5974

Patent

active

053643224

ABSTRACT:
A control apparatus for a marine engine capable of effectively suppressing a great variation in the rotational speed of the engine due to a great variation in an intake air pressure particularly when the engine is trolling. In one form, an air/fuel ratio of a mixture supplied to the engine is made constant to maintain engine output power at a constant level. In another form, the intake air pressure, based on which the engine is controlled, is averaged in such a manner as to reduce a variation in the engine rotational speed by using a greater averaging coefficient during trolling than at other times. In a further form, if a variation in the intake air pressure is less than a predetermined value, the intake air pressure is used controlling the engine, whereas if otherwise, another engine operating parameter such as an opening degree of a throttle valve is used instead of the intake air pressure.

REFERENCES:
patent: 3020777 (1962-02-01), Burkett
patent: 4972737 (1990-11-01), Makimoto
patent: 5172666 (1992-12-01), Nonaka
patent: 5184589 (1993-02-01), Nonaka
patent: 5241939 (1993-09-01), Nonaka

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