Based on the analysis of the function of low speed engine control system

the function of real-time simulation model of electronically controlled low-speed marine diesel engines was determined. Using the modular modeling method

sub-models of in-cylinder working process

intake and exhaust process

turbocharger and intercooler were developed for the real-time engine simulation model. Independent sub-models of fuel injection

exhaust valve and auxiliary fan were established as the controlled objects of the engine electronic control system to control engine operation

which enabled simulated performance parameters to vary in real time with the change of control parameters. Finally

the real time engine simulation model was integrated with the hardware-in-the-loop hardware. The verification of the accuracy and real-time performance of the developed real-time simulation model for low-speed engines was carried out by test. The simulated data was compared with the test data in the test report. The maximum difference between the simulated data and test data in the steady-state conditions was less than 5%

and the real time factor running in the simulation was less than 1.The accuracy and real-time performance of the low-speed diesel engine simulation model meets the test requirement of the hardware-in-the=loop simulation system and it can be used in the low-speed diesel engine hardware-in-the-loop simulation system to carry out the functional test of electronic control system.