To address the issue of power reduction and cylinder-to-cylinder inhomogeneity throughout the entire life cycle of a diesel engine

injector aging was simulated by taking a MAN 6L16/24 marine diesel engine as the research object. The performance improvement in terms of engine power

cylinder-to-cylinder homogeneity and dynamic control was compared with different control strategies of open-loop map

closed-loop speed and closed-loop combustion. Considering the large hysteresis in the speed response of closed-loop combustion control

a cooperative control strategy of the combination of the closed-loop speed control and the closed-loop combustion control was proposed. The robustness of the cooperative control strategy against common rail pressure fluctuation and intake port obstruction was simulated and analyzed. It is shown that the proposed cooperative control strategy is effective to reduce cylinder-to-cylinder inhomogeneity and acquire fast speed response.