Feedback control system for marine propulsion engine

Details Feedback control system for marine propulsion engine Feedback control system for marine propulsion engine

1995-12-20

1997-05-20

Nelli, Raymond A.

Internal-combustion engines

Spark ignition timing control

Electronic control

F02P 500

Patent

active

056303955

ABSTRACT:
A number of embodiments of feedback control systems for maintaining the desired air fuel ratio in a marine propulsion engine that has an exhaust system for exhausting the exhaust gases to the atmosphere through an underwater exhaust gas discharge and wherein the discharge is adjustable relative to the associated watercraft. Hull conditions which will change the engine performance are measured and the amount of fuel air ratio supplied to the engine by a feedback control system is varied, depending upon the sensed airflow and the sensed condition that may affect engine performance and, accordingly, the ideal air fuel ratio. Spark ignition timing is also changed and the air fuel ratio may be corrected depending upon exhaust back pressure.

REFERENCES:
patent: 4909764 (1990-03-01), Hirukawa et al.
patent: 5327866 (1994-07-01), Kitajima
patent: 5327867 (1994-07-01), Hisaki et al.

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