An Experimental Approach and A Signal Processing Method with the Common Rail Injection System of a Diesel Engine

Thin Quynh Nguyen; Andrey Y. Dunin; Mikhail G. Shatrov

doi:10.3991/ijoe.v17i14.27401

Authors

Thin Quynh Nguyen Faculty of Mechanical Engineering, University of Transport and Communications, Ha Noi, 100000, Vietnam
Andrey Y. Dunin Ishlinsky Institute for Problem in Mechanics RAS, 101-1, Vernadskogo Prosp., Moscow, 119526, Russia.
Mikhail G. Shatrov 3Ishlinsky Institute for Problem in Mechanics RAS, 101-1, Vernadskogo Prosp., Moscow, 119526, Russia

DOI:

https://doi.org/10.3991/ijoe.v17i14.27401

Keywords:

control signal, diesel engine, common rail fuel system, electrohydraulic in-jector, differential injection characteristic

Abstract

This paper presents a method and results, which studies influences of the fuel flow mode on the pressure oscillation in the volumes of the accumulator fuel system. The fuel is supplied through nozzle holes into a constant volume chamber, which is installed a jet for fuel discharge into the low-pressure line. Results show that the increase in the base pressure value of the fuel accumulator leads to the rise in the slope of the leading edge of the differential characteristics and the maximum dQ/dt value changes closer to the beginning moment of the fuel injection process. At the same time, the control pressure value is a significant parameter that greatly influences the shape of the injection characteristic. In addition, when using the drain orifices with different diameters, received values and differential characteristics vary during the fuel supply process. The differential characteristics of the study are the basis for implementing fuel injection control solutions.