Effects of Fuel Properties on Exhaust Emissions from DI Diesel Engines

Tanaka, Shigeyuki; Morinaga, Masataka; Yoshida, Haruhisa; Takizawa, Haruo; Sanse, Kazuyoshi; Ikebe, Hiromichi

doi:10.4271/962114

Cited by 15 publications

(1 citation statement)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Investigations have been carried out on different approaches for improving exhaust emissions when alternative fuels are used. From previous studies, it is known that the reductions in aromatics, distillation temperature, viscosity, and density lead to lower particulate matter (PM) emissions [6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

The impact of ignition delay and further fuel properties on combustion and emissions in a compression ignition engine

Erman

Hellier

Ladommatos

2020

Fuel

View full text Add to dashboard Cite

Better understanding of combustion and formation of exhaust gas pollutants of fuels is needed in order to meet stringent regulation standards of a diesel engine. The cetane number is one of the mostcited indicators of diesel fuel quality. This paper presents experimental studies with a wide range of fuels to investigate the effect of cetane number on combustion and exhaust emissions (CO, NO x , PM, particle number size distribution). The fuel ignitability was controlled in two different ways: naturally, by using seven fuels (Dearomatised Hydrotreated Stream, Hydrotreated Non-Dearomatised Stream, Soy Methyl Ester, Rapeseed Methyl Ester, Heavy Paraffinic Stream, C10-C14 Paraffins, and C14-C17 Paraffins) with different cetane numbers, and through the use of an ignition improver blended into a single base fuel (Hydrotreated Non-Dearomatised Stream (NDH)) to change the ignition chemistry of the fuel while keeping physical properties unchanged. The tests were performed in naturally-aspirated single-cylinder DI diesel engine at 1200 rpm and 600 bar injection pressure at 4 bar and 6 bar IMEP. The engine tests were carried out at constant fuel injection timing and constant start of combustion timing. A strong positive correlation was found between ignition delay and CO emissions. The effect of physical and chemical properties of the fuel on NO x and particulate emissions became more dominant at higher load. Overall the results showed that changes in the fuel physical properties and molecular structure, in particular, the incorporation of oxygen, impacted on combustion and emissions through various routes in addition to the effects of ignition delay only.

show abstract

Section: Introductionmentioning

confidence: 99%

The impact of ignition delay and further fuel properties on combustion and emissions in a compression ignition engine

Erman

Hellier

Ladommatos

2020

Fuel

View full text Add to dashboard Cite

show abstract

A Vector Approach to Regression Analysis and Its Implications to Heavy-Duty Diesel Emissions

McAdams¹,

Crawford

Hadder

2001

View full text Add to dashboard Cite

An alternative approach is presented for the regression of response data on predictor variables that are not logically or physically separable. The methodology is demonstrated by its application to a data set of heavy-duty diesel emissions. Because of the covariance of fuel properties, it is found advantageous to redefine the predictor variables as vectors, in which the original fuel properties are components, rather than as scalars each involving only a single fuel property. The fuel property vectors are defined in such a way that they are mathematically independent and statistically uncorrelated. Because the available data set does not allow definitive separation of vehicle and fuel effects, and because test fuels used in several of the studies may be unrealistically contrived to break the association of fuel variables, the data set is not considered adequate for development of a full-fledged emission model. Nevertheless, the data clearly show that only a few basic patterns of fuel-property variation affect emissions and that the number of these patterns is considerably less than the number of variables initially thought to be involved. These basic patterns, referred to as "eigenfuels," may reflect blending practice in accordance with their relative weighting in specific circumstances. The methodology is believed to be widely applicable in a variety of contexts. It promises an end to the threat of collinearity and the frustration of attempting, often unrealistically, to separate variables that are inseparable. xii EXECUTIVE SUMMARY Multiple regression analysis is one of the most widely used methodologies for expressing the dependence of a response variable on several predictor variables. In spite of its evident success in many applications, the regression approach can face serious difficulties when the predictor variables are to any appreciable extent covariant. This point was made quite evident in a recently published review, which found that efforts to evaluate the separate effects of fuel variables on the emissions from, heavy-duty diesel (HDD) engines were often frustrated by the close association of fuel properties. This report addresses these concerns by offering a new approach to modeling the effects of fuel characteristics on emissions. The work was motivated by the observation that most HDD engine research was conducted with test fuels that had been "concocted'.' in the laboratory to vary selected fuel properties in isolation from each other. This approach can eliminate the confounding effect caused by naturally covarying fuel properties, but it departs markedly from the real world, where the reformulation of fuels to reduce emissions will naturally and inevitably lead to changes in a series of interrelated properties. What impact might this method of blending test fuels have on their ability to provide an accurate and reliable basis for assessing the emissions performance of future diesel fuels? Development of a New Statistical Methodology The approach presented here is based on the use of Principal C...

show abstract

PCR+ In Diesel Fuels and Emissions Research

McAdams

2002

View full text Add to dashboard Cite

Effects of Fuel Properties on Exhaust Emissions from DI Diesel Engines

Cited by 15 publications

References 12 publications

The impact of ignition delay and further fuel properties on combustion and emissions in a compression ignition engine

The impact of ignition delay and further fuel properties on combustion and emissions in a compression ignition engine

A Vector Approach to Regression Analysis and Its Implications to Heavy-Duty Diesel Emissions

PCR+ In Diesel Fuels and Emissions Research

Contact Info

Product

Resources

About