Driving electronic board with adjustable piloting signal parameters for characterization of Common Rail diesel injectors with pure biodiesel

This paper describes the functioning of an electronic board for driving solenoid diesel injectors, designed and used in experimental setup based on Common Rail injection scheme, for injectors' characterization with 100% biodiesel fuel through analysis of spray emitted in a quiescent velocimetric chamber. The board allows user to adjust electrical/temporal parameters of voltage signal applied to injector coil, determining its opening, by acting on six potentiometers. The electronic setup for control and execution of whole injection process is also composed of a National Instruments acquisition board, both units controlled from PC by means of an expressly implemented LabView Virtual Instrument.