By obtaining an atmospheric pressure learning value by applying filtering to an estimated atmospheric pressure found from an estimated atmospheric pressure map in an atmospheric pressure learning region matched in advance, and by constantly updating this atmospheric pressure learning value, stable and highly reliable atmospheric pressure estimation can be achieved. Also, a pre-set parameter value or the last atmospheric pressure learning value is used as the initial atmospheric pressure value and an unstable intake pressure value at the engine start in a battery-less state is not used. Hence, it becomes possible to provide an estimated atmospheric pressure with which high drivability is achievable by fully exploiting the engine performance as soon as the engine is started.
Atmospheric pressure estimation device of outboard motor
2015-06-30
Patent
Elektronische Ressource
Englisch
STEERING DEVICE OF OUTBOARD MOTOR, OUTBOARD MOTORBOAT
Europäisches Patentamt | 2016
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