Patent ID: 8155813
Filing Date: 2012-04-10
Classification: B63H,B63J,F01N,F02D,Y02T

Abstract:
1. A control device for a vessel which is equipped with an exhaust heat recovery system and comprises an internal combustion engine, a shaft generator connected to the internal combustion engine by an output shaft, an engine output unit for transmitting output of the internal combustion engine and the shaft generator to a propeller, and the exhaust heat recovery system for the vessel including the internal combustion engine, the control device comprising: a feedback controller which controls a fuel injection amount needed for the internal combustion engine based on a difference between a target rotation speed of the propeller set by a vessel operator and an actual rotation speed of the propeller so as to obtain a standard fuel injection amount having been subjected to feedback control; and a feedforward controller which comprises a power surplus state detector for detecting surplus power generated in the exhaust heat recovery system and determining whether or not there is surplus power, an engine output calculation unit for calculating an engine output for driving the propeller from an output of the shaft generator functioning as an electric motor by the surplus power, and a correction value calculation unit for calculating a first correction value of the fuel injection amount for the internal combustion engine based on the engine output and an engine rotation speed, wherein the standard fuel injection amount is corrected by subtracting the first correction value obtained from the feedforward controller from the standard fuel injection amount obtained from the feedback controller.