Research On Auto-control Cooling And Lubricant Subsystem Of Marine Diesel Engine

Nowadays, more and more electronic control technical has been used to improve the synthesis performance of diesel engine. The control structural which is combined of the virtual instrument based on LabVIEW and the PLC control system has been used in the cooling and lubricant system of marine diesel engine to develop an electronic control cooling and lubricant test module. The parameter of cooling water and lubricant of this test module can be set and auto-controlled.This paper has mainly discussed in the following aspects of the design:The sensor, temperature regulating valve, electronic valve, frequency electromotor and so on, are added to the cooling and lubricant system of diesel engine to achieve the auto control of the system; The test interface of the main components of cooling and lubricant system was designed in the system followed by the standard of People's Republic of China, which makes the system multifunctional; Three dimension design tool has been used to simulate the set of whole system which makes the layout much more intuitionistic.The control project design,the main modules of the PLC and the parts of main modules of the virtual instrument based on LabVIEW have been discussed in this article .The system not only has the convenient human machine interaction and the strong ability of data processing of virtual instrument, but also has the stability and good adaptability of the PLC control system. The modularization and expansibility of the system is also considered in the design.In the future, this module can be attached to the diesel engine to investigate the control tactic of cooling and lubricant system. Then this module can be used as a sub system of the electoral control diesel engine to achieve the auto control of the parameter of cooling water and lubricant under different operating conditions.