Engine Combustion

Rakowski, Sebastian; Eckert, P.; Witt, Andreas

doi:10.1007/978-3-642-14094-5_4

Cited by 3 publications

(9 citation statements)

References 13 publications

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“…The formation of pollutants as a function of equivalence air-fuel ratio is shown in Fig. 6 (Bagány, 2011;Baumgarten et al, 2018;Eckert and Rakowski, 2012;Kalmár and Stukovszky, 1998;Meggyes and Boschán, 1993;Rakowski et al, 2012;Vas, 2005).…”

Section: Air-fuel Ratio and Its Effect On Pollutantsmentioning

confidence: 99%

“…Fig. 7 shows the range of NO X formation as a function of temperature and local air conditions in a conventional and an alternative (low temperature) combustion process (Bagány, 2011;Eckert and Rakowski, 2012;Meggyes and Boschán, 1993;Merker et al, 2012;Rakowski et al, 2012;Vas, 2005).…”

Section: Air-fuel Ratio and Its Effect On Pollutantsmentioning

confidence: 99%

“…Three methods used for stratified charge mode are shown in Fig. 13 (Bagány, 2011;Kalmár and Stukovszky, 1998;Merker et al, 2006;Rakowski et al, 2012;Schäfer and Basshuysen, 1995;Schäfer et al, 2017).…”

Section: Stratified Mixturementioning

confidence: 99%

“…The evaluation of the use of a homogeneous, stoichiometric mixture and a lean mixture is summarized in Table 3. In the evaluation, " + " means favorable, "0" means neutral, and "-" means unfavorable (Bagány, 2011;Kalmár and Stukovszky, 1998;Merker et al, 2006;Rakowski et al, 2012;Schäfer and Basshuysen, 1995;Schäfer et al, 2017).…”

Section: Stratified Mixturementioning

confidence: 99%

See 3 more Smart Citations

Investigation of Possibilities of λ = 1 Full Load Operation for Gasoline Engines in the Light of Future Emission Regulation

Szabados

Szűcs

Hézer

et al. 2022

Period. Polytech. Transp. Eng.

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To date, huge amounts of money have been invested in the development of internal combustion engines to reach the current level of technology. High specific power and good thermal efficiency have been achieved, thanks to which, internal combustion engines are now widely used. However, the driving force behind the developments is no longer the high performance, but the compliance with strict emission standards. Future emissions regulation, namely Euro 7, will be challenging for engine and vehicle manufacturers. One possible technical solution may be to use a stoichiometric air-fuel mixture on the entire engine map to meet the requirements of the Euro 7 emission standard. This article analyzes the change in Euro regulations in the light of Euro 7, as well as the theoretical background of the λ = 1 operation. Several technical possibilities to achieve the stoichiometric ratio, such as e.g. water injection or variable compression ratio are presented.

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Section: Air-fuel Ratio and Its Effect On Pollutantsmentioning

confidence: 99%

Section: Air-fuel Ratio and Its Effect On Pollutantsmentioning

confidence: 99%

Section: Stratified Mixturementioning

confidence: 99%

Section: Stratified Mixturementioning

confidence: 99%

See 2 more Smart Citations

Investigation of Possibilities of λ = 1 Full Load Operation for Gasoline Engines in the Light of Future Emission Regulation

Szabados

Szűcs

Hézer

et al. 2022

Period. Polytech. Transp. Eng.

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“…NOx also causes acid rain and destruction of the ozone layer [6][7][8]. Therefore, emission control is tremendously momentous in diesel engines [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Computational Fluid Dynamics Analysis of Flow and Combustion of a Diesel Engine

Abay¹

2017

Journal of Thermal Engineering

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Efficient usage of fossil fuels and reduction of CO2 emissions are very important priorities for the automotive industry. Without increasing contributions from diesel engines and newer diesel technologies, it would not be possible to successfully meet fuel consumption and CO2 emission reduction targets. Therefore, new regulations and applications have been put into action to address exhaust gas emission problems. Some exhaust gases have become prominent with regard to strong effects, such as NOx and soot. NOx contributes to acid rain, which has deteriorating effects on the ozone layer. In this study, flow and combustion characteristics of a diesel engine are investigated by using Computational Fluid Dynamics (CFD). Whole engine components are modeled and analyses are performed for entire speed range of the engine. Calculated crank angle dependent pressure and temperature values are used as boundary condition for reactive 3D CFD simulations. Reactive CFD simulations are performed with 45° sector geometry for the period that both valves are closed. In reactive simulations, RNG k-ε and Standard k-ε models are used to characterize turbulence flow field. A lagrangian approach is used for two-phase flow computations to simulate the liquid fuel injection. Commercially available CFD code called Forte Reaction Design and its sub-module Chemkin are used for three dimensional reactive simulations, moving grid generation and problem setup. Predicted in-cylinder pressure and apparent heat release rate are validated with experimental results. NOx and Soot formations as a result of combustion process are also investigated. Optimum level of NOx and Soot formation obtained with 8.5% EGR usage.

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Modeling the Effects of High EGR Rates in Conjunction with Optimum Multiple Injection Techniques in a Heavy Duty DI Diesel Engine

Mobasheri¹,

Khabbaz²

2014

SAE Technical Paper Series

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Engine Combustion

Cited by 3 publications

References 13 publications

Investigation of Possibilities of λ = 1 Full Load Operation for Gasoline Engines in the Light of Future Emission Regulation

Investigation of Possibilities of λ = 1 Full Load Operation for Gasoline Engines in the Light of Future Emission Regulation

Computational Fluid Dynamics Analysis of Flow and Combustion of a Diesel Engine

Modeling the Effects of High EGR Rates in Conjunction with Optimum Multiple Injection Techniques in a Heavy Duty DI Diesel Engine

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