MARINE PROPULSION SYSTEM WITH ELECTRIC MOTOR ASSIST

摘要

A propulsion system for a marine vessel comprises an internal combustion engine including an output shaft. The internal combustion engine has a power curve based on a rotational speed of the output shaft. The power curve defines a rated power of the internal combustion engine at any given rotational speed of the output shaft. A propeller shaft is coupled to the internal combustion engine. An electric machine is coupled to one of the output shaft or the propeller shaft. A propeller is coupled to the propeller shaft. The propeller has a propeller curve based on the rotational speed of the output shaft. The electric machine is activated to add torque to one of the output shaft or the propeller shaft in response to rotational speed data or loading data passing one or more predetermined threshold values for the output shaft.