NOx Reduction Using Injection Rate Shaping and Intercooling in Diesel Engines

Ghaffarpour, M.; Baranescu, Rodica A.

doi:10.4271/960845

Cited by 20 publications

(10 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The computational work of Ghaffarpour and Baranescu [10] suggests that the use of a boot injection is not very efficient at medium speed and low load. Also, Ikegami et al [11], with their spool acceleration system, demonstrate how the influence of rate shaping on soot emission depends on the maximum pressure attained by the system.…”

Section: Bibliographic Reviewmentioning

confidence: 99%

The modification of the fuel injection rate in heavy-duty diesel engines. Part 1: Effects on engine performance and emissions

Desantes

Benajes

Molina

et al. 2004

Applied Thermal Engineering

View full text Add to dashboard Cite

Section: Bibliographic Reviewmentioning

confidence: 99%

The modification of the fuel injection rate in heavy-duty diesel engines. Part 1: Effects on engine performance and emissions

Desantes

Benajes

Molina

et al. 2004

Applied Thermal Engineering

View full text Add to dashboard Cite

“…These characteristics complicate the application of this type of combustion. The use of a pilot injection has gained significant interest in recent years in conventional Diesel combustion as a means to reduce engine combustion noise [11]. Pilot injection reduces the ignition delay (ID) of the main injection and limits the amount of premixed combustion [12,13].…”

Section: Introductionmentioning

confidence: 99%

Sensitivity of combustion noise and NOx and soot emissions to pilot injection in PCCI Diesel engines

et al. 2013

View full text Add to dashboard Cite

Diesel engines are the most commonly used internal combustion engines nowadays, especially in European transportation. This preference is due to their low consumption and acceptable driveability and comfort. However, the main disadvantages of traditional direct injection Diesel engines are their high levels of noise, nitrogen oxides (NO x ) and soot emissions, and the usage of fossil fuels. In order to tackle the problem of high emission levels, new combustion concepts have been recently developed. A good example is the premixed charge compression ignition (PCCI) combustion, a strategy in which early injections are used, causing a burning process in which more fuel is burned in premixed conditions, which affects combustion noise. The use of a pilot injection has become an effective tool for reducing combustion noise. The main objective of this paper is to analyze experimentally the pollutant emissions, combustion noise, and performance of a Diesel engine operating under PCCI combustion with the use of a pilot injection. In addition, a novel methodology, based on the decomposition of the in-cylinder pressure signal, was used for combustion noise analysis. The results show that while the PCCI combustion has potential to reduce significantly the NO x and soot emission levels, compared to conventional Diesel combustion strategy, combustion noise continues to be a critical issue for the implementation of this new combustion concept in passenger cars.

show abstract

“…This shape is typical for high speed or high load conditions. At idle, low speed and low load, the injection rate often becomes discontinuous with two "humps" separated by an interval with no injection (first hump injected -no injection -second hump injected), (Ghaffarpour & Baranescu, 1996).…”

Section: Rate Shaping and Multiple Injectionsmentioning

confidence: 99%

“…9 shows that for the Cummins ISM370 a 31.6% reduction in the brakespecific PM emissions was obtained for the 350 ppm fuel and a 15.7% and 3.6% reduction for the 30 ppm and 3 ppm fuel, respectively.…”

mentioning

confidence: 94%

Influence of fuel sulfur content on emissions from diesel engines equipped with oxidation catalysts

Evans¹

View full text Add to dashboard Cite

Diesel oxidation catalysts (DOCs) are a viable exhaust aftertreatment alternative for alleviating regulated exhaust emissions of hydrocarbon (HC), carbon monoxide (CO), and particulate matter (PM) from diesel-fueled heavy-duty engines. This study was a part of the Diesel Emissions Control-Sulfur Effects (DECSE) program that was aimed at determining the impact of diesel fuel sulfur levels on diesel oxidation catalysts that were designed to lower brake-specific PM, HC, and CO emissions from on-highway trucks and buses in the 2002-2004 model years. The research focused on high-temperature DOCs installed on a Cummins ISM370 ESP engine, and low-temperature DOCs installed on a Navistar T444E engine to determine how the DOCs affect the various emissions, how fuel sulfur affects emissions, and how fuel sulfur poisons the catalysts over time. The DOCs were found to affect the brake-specific PM, HC, and CO emissions. The PM emissions were not significantly affected by the DOCs when lower sulfur fuels (3 ppm and 30 ppm) were used. Brake-specific PM emissions were dramatically increased with the higher sulfur fuel (350 ppm) due to the formation of sulfates and the associated sulfate bound water. Hence, fuel sulfur affected the brake-specific PM, HC, and CO emissions from DOC equipped heavy-duty diesel engines. Brake-specific HC emissions were eliminated by nearly 100% by the use of the DOCs. The DOCs had various reduction efficiencies ranging from 90% to 100% for CO emissions from the Navistar engine and 24% to 79% for the Cummins engine. The DOCs were only evaluated for only 250 aging hours, which is a relatively short duration. Over this short amount of time, there was no significant evidence of the fuel sulfur poisoning the diesel oxidation catalysts. iii ACKNOWLEGDEMENTS After six years of college education, a part of my life has finally ended. However, there is another part about to begin. Through the past two years of graduate school I have encountered some rough times, but it seemed that the better always won. As I look back on these past two years, I know I could not have accomplished everything on my own. I would like to take this time to express my thanks to the ones that helped see me through this challenging and rewarding time. The first and foremost who needs to be recognized is God. I would never be here if were not for Him. Even though He is unseen, I know His presence is always with me. He needs to be recognized due to the fact that too often He does go unacknowledged. Now to my parents, where I believe there is not enough time and words to show my appreciation and gratitude. Mom and Dad, without your love, encouragement, understanding, and support, I know none of this could have been possible. You have been there for me all the way, and I know you will always be there for me in the future. I can't express how much I love the two of you for this. You need to be recognized for one huge accomplishment, financially supporting three boys through engineering school. Dad, I know it was a lot of hard work for you, a...

show abstract

NOx Reduction Using Injection Rate Shaping and Intercooling in Diesel Engines

Cited by 20 publications

References 13 publications

The modification of the fuel injection rate in heavy-duty diesel engines. Part 1: Effects on engine performance and emissions

The modification of the fuel injection rate in heavy-duty diesel engines. Part 1: Effects on engine performance and emissions

Sensitivity of combustion noise and NOx and soot emissions to pilot injection in PCCI Diesel engines

Influence of fuel sulfur content on emissions from diesel engines equipped with oxidation catalysts

Contact Info

Product

Resources

About