... Abstract Exhaust gas recirculation (EGR) is a common state of the art technology to reduce NO x emissions in internal combustion engines. Owing to the exponential dependency of NO x formation on temperature, the effect of EGR is to increase combustion duration and thus, to reduce the peak...

... Abstract Diesel engines are one of the most commonly used combustion systems for heavy-duty applications like locomotives. Although computational fluid dynamics (CFD) modeling of diesel engines is a mature research topic, CFD modeling of large-bore engines like those used in locomotives has...

...-ignition engines have induced this activation by using late spark timings so that the end of combustion occurs close to the exhaust valve opening. However, this has a negative impact on engine thermal and combustion efficiencies (and therefore carbon dioxide emissions). In this paper, the impact of warm-up...

... Abstract Ammonia and Hydrogen are attractive alternative fuels for a zero-carbon combustion solution that can rapidly decarbonize the transportation industry. Understanding the chemical behavior and combustion characteristics of these fuels individually, as well as blended together, is pivotal...

... Abstract In SI engines, the initial stages of flame kernel formation play an important role in determining the overall thermal efficiency and in reducing the cycle-to-cycle variability. Introducing a cross-flow within the spark gap has shown to reduce the combustion fluctuations by shortening...

... Abstract Combustion and emission performance of internal combustion (IC) engines depend on the ability of the ignition system to provide an ignition kernel that can successfully transition into an early flame kernel. Several key physical phenomena such as flow physics, plasma dynamics, circuit...

... Abstract The use of 3-D CFD combustion models based on tabulated chemistry is becoming increasingly popular. Especially the runtime benefit is attractive, as the tabulated chemistry method allows including state-of-the-art chemical reaction schemes in CFD simulations without significant...

.... The combustion analysis shows the alternative spark plug electrode resulted in an increased early burn rate, which in turn lead to an overall advancing of the combustion phasing. To better decouple combustion phasing effects from test to test variation on brake output parameters, an empirical model is developed...

... Dual fuel engines offer the potential for considerable reductions in emissions of carbon dioxide (CO 2 ), as well as reducing emissions of particulate matter (PM). However, the combustion processes occurring inside a dual fuel engine are complex. This is due to the ignition of a homogeneous lean...

... 14 01 2011 The goal of this study is to find out effects of the injection parameters on the combustion process for a single cylinder of a nine-liter six cylinder diesel engine. Partially premixed compression ignition (PPCI) cases are compared for improvements on the combustion chamber...

... 10 03 2009 New diesel combustion modes face difficult challenges with respect to engine-out emissions and transient behavior. Transitions between lean conventional diesel combustion and lean, premixed, low-temperature diesel combustion are investigated with an automotive diesel engine...

... Proceedings of ICEF2004: ASME Internal Combustion Engine Division 2004 Fall Technical Conference October 24-27, 2004 Long Beach, CA USA N S T io ig v ig th b c c b E e c E c a p d Proceedings of ICEF 04 2004 Fall T chnical Conference of the ASME Internal Combustio Engine Division Proceedings...

...ASME Internal Combustion Engine Division 2004 Fall Technical Conference ICEF2004-833 LASER IGNITION, OPTICS AND CONTAMINATION Josef Graf, Vienna University of Technology Martin Weinrotter, Vienna University of Technology Herbert Kopec University of T particular interest, since the ignition...

... their effects on Proceedings of ICEF 04 2004 Fall Technical Conference of the ASME Internal Combustion Engine Division Proceedings of ICEF04 2004 Fall Technical Conference of the ASME Internal Combustion Engine Division orticity and mean high-pass filtered velocity in the tal plane. The kinetic energy present...

... 19 11 2008 Homogeneous Charge Compression Ignition (HCCI) combustion is currently limited in application due to several key issues such as a narrow operating range, high hydrocarbon and carbon monoxide emissions and lack of control over the onset of combustion. Exhaust gas recycling...

... 19 11 2008 In order to carry out an accurate heat release analysis, it is necessary to solve a non linear set of chemical equilibrium equations to calculate concentrations of the species present in cylinder gases during the combustion process. So, the thermodynamics properties...

... 19 11 2008 CFD Modeling of the injection, the mixing, the combustion and the emission formation processes in a high pressure direct injection (HPDI) natural gas engine is presented in this paper. KIVA3V was used together with an injector model. Two sub-models had been developed...

... of chemical and physical characteristics of F-T fuels have been attributed to the observed reduction in emissions, the actual effects of both the fuel properties and in-cylinder combustion characteristics in modern diesel engines are still not well understood. In this study a 2002, six-cylinder, 5.9 liter...