Untersuchung des Betriebs- und Abgasemissionsverhaltens eines Dieselmotors mit Oxidationskatalysator

May, H.; Hattingen, U; Theobald, Jörg; Weidmann, Kurt; König, A.

doi:10.1007/bf03226441

Cited by 3 publications

(2 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[1,6] • In addition, the mutagenicity of RME emissions is low compared to fossil fuels indicating a reduced health risk from cancer which is related to the extremely low sulphur content of RME [10]. Low exhaust gas sulphur content reduces moreover catalyst wear due to sulphate formation [1,2]. New conventional Diesel fuels (DF) provide also low sulphur contents (Euro-DF <50 ppm, City-DF <10 ppm) and are most likely on their way to match the sulphur content of RME (<5 ppm) [13].…”

Section: Introductionmentioning

confidence: 99%

Detailed Heat Release Analyses with Regard to Combustion of RME and Oxygenated Fuels in an HSDI Diesel Engine

Horn¹,

Egnell²,

Johansson³

et al. 2007

SAE Technical Paper Series

View full text Add to dashboard Cite

Experiments on a modern DI Diesel engine were carried out: The engine was fuelled with standard Diesel fuel, RME and a mixture of 85% standard Diesel fuel, 5% RME and 10% higher alcohols under low load conditions (4 bar IMEP).During these experiments, different external EGR levels were applied while the injection timing was chosen in a way to keep the location of 50% heat release constant.Emission analysis results were in accordance with widely known correlations: Increasing EGR rates lowered NOx emissions. This is explained by a decrease of global air-fuel ratio entailing longer ignition delay. Local gas-fuel ratio increases during ignition delay and local combustion temperature is lowered. Exhaust gas analysis indicated further a strong increase of CO, PM and unburned HC emissions at high EGR levels. This resulted in lower combustion efficiency. PM emissions however, decreased above 50% EGR which was also in accordance with previously reported results.Besides those similar trends, fuel dependent differences in indicated thermal efficiency as well as CO, HC, NOx and especially PM emissions were observed. These differences were evaluated by detailed heat release analysis and explanation models based upon fuel characteristics as fuel viscosity and fuel distillation curve.Fuel spray evaporation and heat release were influenced by these fuel characteristics. Due to these characteristics it was concluded that RME has a higher tendency to form fuel rich zones at low load conditions than the other tested fuel types.Moreover it was found that improved fuel spray vaporisation is an option to improve exhaust emissions at low load conditions.

show abstract

Section: Introductionmentioning

confidence: 99%

Detailed Heat Release Analyses with Regard to Combustion of RME and Oxygenated Fuels in an HSDI Diesel Engine

Horn¹,

Egnell²,

Johansson³

et al. 2007

SAE Technical Paper Series

View full text Add to dashboard Cite

show abstract

“…Combustion-chamber geometry, the fuel injection process, combustible mixture formation with pre-ignition and ignition processes, and engine load may significantly influence combustion and emission formation and lead to a conclusion that deviates from commonly accepted norms. Some authors , report very high increases of NO x emissions, the reduction of CO, and unburned HC emissions when using biodiesel fuel, while others have experienced just moderate increases of NO x emissions with unchanged CO and HC emissions , or even a reduction in all emissions. , These somehow contradictory conclusions are caused by the nonuniformity of engine testing. These tests were performed on different engines using different combustion-chamber geometry.…”

Section: Introductionmentioning

confidence: 99%

Influence of Biodiesel Fuel on the Combustion and Emission Formation in a Direct Injection (DI) Diesel Engine

Hribernik

Kegl

2007

Energy Fuels

View full text Add to dashboard Cite

This paper studies the influence of biodiesel fuel on the combustion and emission formation of two different direct-injected diesel engines, both employing different combustion processes. The research was focused on determining the influence of the specific combustion process on measurement results to ascertain if a generalization of the results is possible or whether they have to be interpreted as specific for specific engines. Standard D2 diesel fuel and commercial 100% biodiesel fuel were used. Tests were executed using both fuels under the same conditions, and exhaust emissions and engine performance were measured and compared. In-cylinder pressure was also acquired, and the rate of heat release curves were computed by means of a zero-dimensional, one-zone combustion model. Some macroparameters of the combustion process were obtained from the heat-release-rate curves. The results obtained for both engines showed that findings regarding the influence of biodiesel fuel on the combustion process and emission formation could not be generalized and had to be interpreted as specific for the particular engine.

show abstract

Results from a Durability Test of a Mustard Seed Oil Driven Tractor Engine

Niemi¹,

Hätönen²,

Laiho³

1998

SAE Technical Paper Series

View full text Add to dashboard Cite

Untersuchung des Betriebs- und Abgasemissionsverhaltens eines Dieselmotors mit Oxidationskatalysator

Cited by 3 publications

References 1 publication

Detailed Heat Release Analyses with Regard to Combustion of RME and Oxygenated Fuels in an HSDI Diesel Engine

Detailed Heat Release Analyses with Regard to Combustion of RME and Oxygenated Fuels in an HSDI Diesel Engine

Influence of Biodiesel Fuel on the Combustion and Emission Formation in a Direct Injection (DI) Diesel Engine

Results from a Durability Test of a Mustard Seed Oil Driven Tractor Engine

Contact Info

Product

Resources

About