Automatic trim controller for marine propulsion unit

Details Automatic trim controller for marine propulsion unit Automatic trim controller for marine propulsion unit

1992-11-19

1994-11-22

Swinehart, Edwin L.

Marine propulsion

Means to control the supply of energy responsive to a sensed...

440 61, B63H 2122

Patent

active

053663934

ABSTRACT:
Several embodiments of automatic trim controls for marine outboard drives for maintaining the optimum trim angle under all running conditions. The velocity of the watercraft is determined and the outboard drive is trimmed up as long as the velocity continues to increase and then is trimmed down so as to maintain the highest velocity possible for a given running condition. Several different computer programs are illustrated and described for achieving this purpose and a number of different embodiments of power units for controlling the trim condition are also described, some hydraulic and other mechanical.

REFERENCES:
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patent: 3070301 (1962-12-01), Sarnoff
patent: 3191573 (1965-06-01), Hixon
patent: 3314391 (1967-04-01), Dupont
patent: 3468282 (1969-09-01), Wintercorn
patent: 3641965 (1972-02-01), Schmiedel
patent: 3714825 (1973-02-01), Melvin
patent: 4318699 (1982-03-01), Wenstadt et al.
patent: 4368509 (1983-01-01), Li
patent: 4413215 (1983-11-01), Cavil et al.
patent: 4718872 (1988-01-01), Olson et al.

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