Abstract
Injection-induced rail pressure fluctuations are proven to cause nonuniform spray development. These fluctuations are also responsible for generating lower injection pressures, to the detriment of jet penetration length and break-up timing. Despite the vast literature dealing with such issues, several aspects of rail pressure fluctuations remain unclear. Additionally, the need for compliance with the emission legislation has shed light on the potential of alternative fuels, which represent a pathway for sustainable mobility. This scenario has motivated the present study dealing with the assessment of the time history of rail pressure correlated with fuel properties. Tests have been performed using a last-generation common rail injection equipment under various injection settings, employing diesel and 2-methylfuran-diesel blend. This paper describes the research activity and aims to provide new insights into the correlation of rail pressure fluctuations with fuel properties.
Highlights
The massive introduction of the electronically managed injection system is mainly due to the flexibility and fast response of the injection system components
It is well known that the speed c of wave propagation across a liquid is approximately calculable via Eq (1)
The lower bulk modulus is meaningful for the greater fluid ability to absorb the wave energy, which is responsible for promoted amplitude oscillation
Summary
The massive introduction of the electronically managed injection system is mainly due to the flexibility and fast response of the injection system components. Additional refinements on modern engines have been demanded by the emission legislation over the last decades This has led the engine manufacturers to design the MultiJet system, which assures considerably faster injector actuation, enabling the injection cycle to be split up into eight separate shots. Such a technology has been demonstrated to appreciably improve the accuracy of the injected fuel amount. It is well known that the stroke-by-stroke motion of the pump significantly contributes to rail pressure fluctuations. This framework has driven the research community to develop several predictive models and devices to control or even compensate for the rail pressure oscillations
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
