Gasoline DI Engines: The Complete System Approach By Interaction of Advanced Development Tools

Wirth, Martin; Piock, Walter F.; Fraidl, Günter; Schoeggl, Peter; Winklhofer, Ernst

doi:10.4271/980492

Cited by 41 publications

(10 citation statements)

References 4 publications

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“…Several DISI engine models have emerged into the international market and have highlighted the potential benefits on both fuel economy and pollutant reduction. Most of these engines are based on the wall-guided combustion design concept (Wirth et al, 1998;Nouri and Whitelaw, 2002). These "first generation" injection systems, with swirl pressure atomizers have been shown lower fuel consumption by up to 20% in the case of stratified, overall-lean part-load operation, but showed no significant improvements in HC and NOx emissions (Fraidl et al, 1996).…”

Section: Introductionmentioning

confidence: 99%

Effects of intake flow on the spray structure of a multi-hole injector in a DISI engine

Kim

Nouri

Yan

et al. 2009

Int.J Automot. Technol.

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This is the accepted version of the paper.This version of the publication may differ from the final published version. ABSTRACT−The spray characteristics of a 6-hole injector were examined in a single cylinder optical direct injection spark ignition engine. The effects of injection timing, in-cylinder charge motion, fuel injection pressure, and coolant temperature were investigated using the 2-dimensional Mie scattering technique. It was confirmed that the incylinder charge motion played a major role in the fuel spray distribution during the induction stroke while injection timing had to be carefully considered at high injection pressures during the compression stroke to prevent spray impingement on the piston. Permanent

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Section: Introductionmentioning

confidence: 99%

Effects of intake flow on the spray structure of a multi-hole injector in a DISI engine

Kim

Nouri

Yan

et al. 2009

Int.J Automot. Technol.

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“…The middle cycles are defined as P max À 0:25s4P max 4 P max + 0:25s. Finally, slow cycles are defined as P max 4 P max À s. In the three-zone entrainment model, the burn-up time constant C tb in equation (3) has been found to change from engine to engine. 22 It is tuned to simulate a middle engine cycle.…”

Section: Homogeneous Validationmentioning

confidence: 99%

“…Stratification also causes the exhaust temperature to be cooler than that of a homogeneous lean burn engine, therefore consideration must be given to the aftertreatment operating at these low temperatures. 2 However, Wirth et al 3 found that fuel stratification is a viable combustion strategy at low load, showing a decrease in both fuel consumption and NOx emissions.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic modelling of a stratified charge spark ignition engine

Smith

Roberts

Kountouriotis

et al. 2018

International Journal of Engine Research

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Combustion of a charge with spatially and temporally varying equivalence ratio in a spark ignition engine was modelled using the Leeds University Spark Ignition Engine quasi-dimensional thermodynamic code. New sub-models have been integrated into Leeds University Spark Ignition Engine that simulate the effect of burnt gas expansion and turbulent mixing on an initial equivalence ratio distribution. Realistic distribution functions were used to model the radially varying equivalence ratio. The new stratified fuel model was validated against experimental data, showing reasonable agreement for both the pressure trace and percentage heat released. Including the effect of turbulent mixing was found to be important to reproduce the trend in the differences between the stratified and homogeneous simulations.

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“…The 'first generation' DISI engines were based on the wall-guided combustion design concept with swirl pressure atomisers being used in the injection systems [2]. Recent research on DISI engines has been on sprayguided strategy using a new generation fuel injection system with either central or side fuel injection [3].…”

Section: Introductionmentioning

confidence: 99%

Effects of intake flow and coolant temperature on the spatial fuel distribution in a direct-injection gasoline engine by PLIF technique

Kim

Yan

Nouri

et al. 2013

Fuel

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Citation: Kim, S., Yan, Y., Nouri, J. M. and Arcoumanis, C. (2013). Effects of intake flow and coolant temperature on the spatial fuel distribution in a direct-injection gasoline engine by PLIF technique. Fuel, 106, This is the accepted version of the paper.This version of the publication may differ from the final published version.Permanent repository link: http://openaccess.city.ac.uk/6073/ Link to published version: http://dx. Abstract:The spatial fuel distributions of the homogeneous and stratified charge of a high pressure 6-hole injector were examined in a single cylinder optical direct injection spark ignition (DISI) engine. The effects of in-cylinder charge motion, fuel injection pressure and coolant temperature were investigated using a planar laser induced fluorescence (PLIF) technique. It was found that in the case of homogeneous charge mode, early injection in the intake stroke generated similar fuel distributions at the crank angle of 12° BTDC regardless of the in-cylinder air motion at the coolant temperature of 90°C. In the case of stratified charge mode, the in-cylinder tumble flow played more effective role in mixture preparation than the swirl flow during the compression stroke; and the increase of the coolant temperature improved fuel evaporation; but the increase of the fuel supplying pressure could not change the pattern of the fuel vapour distribution against the expectation.

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Gasoline DI Engines: The Complete System Approach By Interaction of Advanced Development Tools

Cited by 41 publications

References 4 publications

Effects of intake flow on the spray structure of a multi-hole injector in a DISI engine

Effects of intake flow on the spray structure of a multi-hole injector in a DISI engine

Thermodynamic modelling of a stratified charge spark ignition engine

Effects of intake flow and coolant temperature on the spatial fuel distribution in a direct-injection gasoline engine by PLIF technique

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