Patent ID: 9037324
Filing Date: 2015-05-19
Classification: B63H

Abstract:
1. A method for automatically controlling a marine propulsion system with an internal combustion engine and a surface-piercing propeller, comprising the steps of: considering a desired power to be a set rotational speed (nSL); computing a rotational speed control deviation (dn) from the set rotational speed (nSL) and an actual rotational speed (nIST) of the internal combustion engine in a processor; determining an injection quantity (qV) in the processor for automatic rotational speed control of the internal combustion engine by a rotational speed controller from the rotational speed control deviation (dn); computing an effective rotational from rotational speed deviation (dn) in the processor using a step function engine map to provide a robust effective rotational speed; and con troll trim position (POS) of the surface-piercing propeller with a system controller in response to signals from the processor as a function of a power reserve (PRES) of the internal combustion engine, of an actual trim position (POS(IST)), and of the effective rotational speed (nEFF) that is determined from the rotational speed control deviation (dn), the trim position being adjusted by an actuator by only adjusting a shaft that drives the surface-piercing propeller in response to signals from the system controller.