At present, the ship power is still dominated by diesel engines, and the electronic control system is an important accessory product for diesel engines. The main problems are: (1) lack of brand products with independent intellectual property rights, products rely on imports for a long time; (2) system integration The ability is weak, and key technologies and core equipment are subject to people; (3) products and technologies are increasingly not adapted to the requirements of new norms and new standards, and need to be upgraded and updated; (4) high-end equipment development is still blank.

In summary, the electronic control system has become a bottleneck restricting the development of China's ship power technology. It is urgent to carry out research on diesel engine control technology. It is necessary to break through the key technologies that restrict technology development and product application, and improve China's technical level in this field. And catch up with the international advanced level, develop a comprehensive electronic control system for diesel engines with independent intellectual property rights. The successful development of diesel electrical control system is of great significance for improving the support capability and performance of marine power equipment, and it is also the only way for China to realize the transition from a shipbuilding power to a shipbuilding power.

Technical analysis of the project At present, China's marine diesel engines mainly use positional fuel supply systems. The electronic control system is still dominated by electronic speed control systems. Although some models use simultaneous supercharged electronic control, condition monitoring and fault diagnosis systems, Each part of the function is independent, lacks unified and systematic optimization, and the optimization of diesel engine performance is limited. In response to this problem, the development system takes advantage of system integration in the development, and comprehensively processes electronic speed regulation, successive boosting, cylinder cut-off oil, state parameters and fault diagnosis information, such as successive pressurization and cylinder cut-off oil. The switching control needs to refer to factors such as diesel engine speed, supercharger speed and load condition, and optimize the fuel supply of the diesel engine with reference to parameters such as boost pressure, intake air temperature and cooling water temperature, and implement emergency shutdown and shutdown according to fault diagnosis information. Different control strategies such as speed reduction, load reduction, and maintenance state realize comprehensive coordinated optimization control of fuel, supercharger and gearbox clutch, realize stable operation of diesel engine, give full play to the performance of diesel engine, and effectively ensure the safe operation of diesel engine.

In the structural design of the integrated electronic control system of diesel engine, according to the principle of modularization, intelligence and generalization, the reasonable decomposition of the function of the system plays an important role in improving the engineering level and maintainability of the system.

In addition, in order to ensure the reliability of the integrated electronic control system of the diesel engine, according to the partial functions, working conditions and reliability requirements, the redundancy of the key components is adopted, and the controller adopts redundancy technology such as hot backup to make the integrated electronic control system of the diesel engine Reliability meets application requirements.

In view of the problems of high risk, high cost and long cycle for the traditional control system development model, the modern "V" mode development process is adopted, and an integrated simulation development platform for the control system from concept design to test verification is established to meet the requirements of modern diesel engine control system. Accurate and fast design requirements minimize the number of prototype system trials and increase design and development efficiency.