Brunswick Corporation
METHODS AND SYSTEMS FOR CONTROLLING TRIM RATE OF TRIMMABLE MARINE DEVICES WITH RESPECT TO A MARINE VESSEL

Abstract:

A method of controlling tilt-trim position of a trimmable device on a marine vessel includes determining a trim rate based on rotational speed of a propulsion device on the marine vessel, the vessel speed of the marine vessel, the vessel pitch of the marine vessel, and/or the vessel acceleration of the marine vessel. The trim rate specifies a rate of rotation of the trimmable device about a horizontal axis, and the trim rate is determined such that the rate of rotation is minimized at high vessel speeds and high rotational speeds and the rate of rotation is maximized at low vessel speeds and low rotational speeds. A variable speed trim actuator is then controlled to rotate the trimmable device based on the trim rate so as to adjust a trim position of the trimmable device.