Computer Simulation of Fuel Injection Systems for DI Diesel Engines

Arcoumanis, C.; Fairbrother, RJ

doi:10.4271/922223

Cited by 17 publications

(3 citation statements)

References 15 publications

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“…Pressure inside diesel fuel injection system pipeline has previously been modeled using principles of mass continuity and momentum conservation [11][12][13][14]. Classical viscous damped WE has also been utilized [15] to simulate pressure fluctuations in common rail (CR) fuel injection system.…”

Section: Introductionmentioning

confidence: 99%

“…Classical viscous damped WE has also been utilized [15] to simulate pressure fluctuations in common rail (CR) fuel injection system. But these models [11][12][13][14][15] lack in considering the effects of frequencies on wave attenuation. It has been reported [16][17][18] while working with ultrasonic impulse moving through viscous fluids in complex frequency domain that attenuation in viscous fluids increases with the increase of frequency.…”

Section: Introductionmentioning

confidence: 99%

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Nonlinear Modeling and Analysis of Pressure Wave inside CEUP Fuel Pipeline

Hayat

Fan

Song

et al. 2014

Mathematical Problems in Engineering

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Operating conditions dependent large pressure variations are one of the working characteristics of combination electronic unit pump (CEUP) fuel injection system for diesel engines. We propose a precise and accurate nonlinear numerical model of pressure inside HP fuel pipeline of CEUP using wave equation (WE) including both viscous and frequency dependent frictions. We have proved that developed hyperbolic approximation gives more realistic description of pressure wave as compared to classical viscous damped wave equation. Frictional effects of various frequencies on pressure wave have been averaged out across valid frequencies to represent the combined effect of all frequencies on pressure wave. Dynamic variations of key fuel properties including density, acoustic wave speed, and bulk modulus with varying pressures have also been incorporated. Based on developed model we present analysis on effect of fuel pipeline length on pressure wave propagation and variation of key fuel properties with both conventional diesel and alternate fuel rapeseed methyl ester (RME) for CEUP pipeline.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Nonlinear Modeling and Analysis of Pressure Wave inside CEUP Fuel Pipeline

Hayat

Fan

Song

et al. 2014

Mathematical Problems in Engineering

View full text Add to dashboard Cite

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“…(1) and (2) are listed in Table 1. Equation (1) was also used by Arcoumanis et al [15] to consider density change with pressure in the simulation of fuel injection systems for direct-injection (DI) diesel engines.…”

Section: Numerical Modelsmentioning

confidence: 99%

Theoretical Investigation on Variable-Density Sprays

2002

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The aim of the present investigation is the analysis of the influence of liquid-fuel compressibility on the simulation of sprays produced by high-pressure injection systems. Two different equations have been introduced in the KIVA3V code to calculate liquid-phase density. The first one determines fuel density by using a second-order function of drop temperature and pressure, while the second one also takes into account the quantity of air dissolved in the fuel. Breakup, vaporization, and collision models as well as the energy, momentum, and air-spray mass exchange equations were modified so that each droplet would have a different density, according to its position and evolution.A comparison between experimental and numerical data for sprays injected in a constant-volume vessel at ambient temperature and pressure has been carried out to test the practical capability of the modified KIVA3V subroutines. The predicted and measured results of penetration versus time and drop size distribution showed good agreement. An in-depth study of the influence of gas temperature on the droplet vaporization rate has been performed for a single droplet and for sprays injected in a high-temperature, medium-pressure, constant-volume chamber. The effect of fuel density variability on vaporizing noncombusting sprays has been investigated for both models. The air dissolved in the fuel was found to affect liquid-phase density only at low ambient pressure.Finally, the experimental data measured on a small-bore diesel engine have been used to verify the provisional capabilities of constant-and variable-density models. NO and soot predictions have shown to be dependent on the model used for liquid-phase density.

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Kraftstoff-Einspritzsystem

Mollenhauer¹

1997

Handbuch Dieselmotoren

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Computer Simulation of Fuel Injection Systems for DI Diesel Engines

Cited by 17 publications

References 15 publications

Nonlinear Modeling and Analysis of Pressure Wave inside CEUP Fuel Pipeline

Nonlinear Modeling and Analysis of Pressure Wave inside CEUP Fuel Pipeline

Theoretical Investigation on Variable-Density Sprays

Kraftstoff-Einspritzsystem

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