Study of the impact of structural parameters on the dynamic response of an electronic fuel injector

Abstract

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Experimental study and optimization in the layouts and the structure of the high-pressure common-rail fuel injection system for a marine diesel engine

“…The detailed modelling process is demonstrated in Hu et al 31 Components validation HP pump. The experimental data were carried out at room temperature with a camshaft speed of 500 r/min.…”

“…The error values are used as the input parameters for the validation and optimisation. The detailed modelling process is demonstrated in Hu et al 31…”

“…A multiobjective genetic algorithm (MOGA) was applied to study the impacts of structural parameters on the dynamic performance of the electronic fuel injector. 31 The combustion chamber shape and fuel injection conditions were optimised through the extended genetic algorithm to balance the trade-off between the fuel efficiency and emission performance, such as the nondominated sorting genetic algorithm (NSGA-II), the neighbourhood cultivation genetic algorithm (NCGA), the micro genetic algorithm. 32,33 Generally, a typical HPCR system for the low-speed diesel engine has the ability to deliver heavy oil from the common rail through a separate injection control unit for each engine cylinder to the standard fuel injection valves.…”

Sensitivity analysis of the dynamic response of an electronic fuel injector regarding fuel properties and operating conditions

“…into a text file, and to do this, appropriate writing and reading rules needed to be specified. The text file is read by the MATLAB code, where the control signal opening/closing moments (t1, t2, t3 and t4) and the needle valve opening/closing moments (T1, T2, T3 and T4) are calculated [45]. Therefore, the valve opening/closing delay and the valve opening/closing time can be…”

Study on the sensitivity of the hydraulic response characteristics of the electronic fuel injector regarding the key structural parameters

“…[21][22][23] However, few studies have mentioned the relationship between structural parameters and hydraulic response characteristics of electronic fuel injector in the literature. Hu et al 24 defined the hydraulic response as opening delay and closing delay and built a complete and detailed one-dimensional (1D) model of the electronic fuel injector, which integrated into an optimization model. They pointed out that the control piston diameter, fuel inlet passage diameter, fuel outlet passage diameter and their interactions are influential factors to the opening delay, while the fuel inlet passage diameter has the dominant effect on the closing delay.…”