Diesel engine combustion analyzer based on LabVIEW

GUO Ting, GONG Man, ZHOU Genming, NIE Leixin
(School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 212003, China)

Abstract: In order to research the working process of the cylinder, a diesel engine combustion analyzer was developed using the field programmable gate array(FPGA) and programmable automation controller(PAC) blocks of LabVIEW, which is based on embedded platform. A general planning was designed to elaborate the hardware design and software program. The LabVIEW was used as its development language, the industrial ethernet was used to send and receive signals, and the demands to acquisition and analysis of cylinder pressure were satisfied. Correction of TDC, data homogenization and smoothening of indicator diagram of the cylinder signals were researched, at the same time, the transformation between the two kinds of indicator diagram was discussed. Test results show that the system could collect realtime cylinder pressure, and the indicator diagram is obtained by computing the cylinder pressure signal. With the indicator diagram and the thermal dynamic fundamental formulas, the thermal parameters of the working medium are obtained. The results provide the reference for the fault diagnosis, performance optimization of diesel engine, etc..
Key words: LabVIEW; field programmable gate array(FPGA); diesel engine; combustion analyzer; programmable automation controller(PAC)