Sterowanie układem zasilania silnika o zapłonie samoczynnym w środowisku rapid-prototyping z wykorzystaniem LabView

Układ sterujący zasilaniem to najistotniejszy element silnika spalinowego decydujący o jego osiągach. W artykule opisano budowę laboratoryjnego układu sterowania zasilaniem silnika z wykorzystaniem narzędzi naukowo-inżynierskich. Opracowany układ oparto na oprogramowaniu LabView i sterowniku rodziny CRio wykorzystujący układy FPGA i mikrokontroler rodziny PowerPc. Zawarte w artykule przykładowe wyniki sterowania potwierdzają skuteczność prezentowanego podejścia do projektowania tego typu stanowisk.

Modern control systems for fuel feeding to self-ignition engines are complex, both in terms of their structure and software. Their complexity virtually prevents their use for controlling engines at test stands, where the major expected features include easy access and control of selected engine parameters. Therefore, in order to study such objects, it is necessary to develop control systems adapted to specific needs [4, 9]. In order to ensure proper operation of an engine and to reproduce the actual conditions of its operation, it is necessary to control its input parameters precisely as well as ensure the complex series of impulses which control fuel injections (Fig. 6). This paper describes the structure of a LabView-based Common Rail-type laboratory controller of a feeding system. The controller was developed based on a CompactRio programmable controller using FPGA systems and PowerPC family microcontrollers, with real-time operation capability. A Driven DI card was used as an injection control output module, which is a card dedicated for controlling this type of elements. The parameters of a PID regulator, which controls the pressure regulation valve, were also selected to ensure that the set fuel pressure is maintained regardless of the operating conditions. The structure of the controller developed in the study is open, which enables its use in different kinds of research and its expansion by additional control systems, as well as recording the operation parameters.