Cooled EGR - A Key Technology for Future Efficient HD Diesels

Zelenka, Paul; Aufinger, Hans; Reczek, Walter; Cartellieri, Wolfgang

doi:10.4271/980190

Cited by 84 publications

(18 citation statements)

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“…O sistema EGR reduz a temperatura dos gases de combustão pela introdução de uma quantidade controlada de gases de escapamento na mistura carburante, reduzindo as emissões de NOx na combustão. A emissão de NOx é função das altas temperaturas da câmara de combustão associadas à presença de oxigênio [6].…”

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Effect of ultra-low sulfur diesel quality on exhaust emission in euro vi diesel engine

Gomes¹,

Melo²,

Moreira³

2019

Blucher Engineering Proceedings

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RESUMOIn Brazil, the P-8 phase of PROCONVE (Air Pollution Control Program for Automotive Vehicles) will start in 2022. This phase uses emissions limits equivalent to EURO VI for heavy-duty vehicles emissions control and some technological improvements will be introduce in the vehicles. This work evaluates the suitability of the current ULSD -Ultra-Low Sulfur Diesel (10-ppm wt., maximum sulfur content) to these new technologies, by performing emissions tests in a EURO VI diesel engine, with Brazilian and European ULSD, to verify the relevance of some of their properties in the pollutants emissions. The Brazilian ULSD with 7 vol.% and 10 vol.% biodiesel (B7 and B10 blends) presented similar performance to the European diesel (B7), regarding hydrocarbons (HC), carbon monoxide (CO), nitrogen oxides (NOx) emissions and particulate matter (PM) and particle number (PN). On the other hand, the Brazilian ULSD with 15 vol.% of biodiesel (B15) in comparison with the European fuel (B7), presented higher NOx emission, and showed no benefits in terms of particulate emissions (PM and PN). In summary, the current Brazilian ULSD (B7 and B10) complies with the requirements of the EURO VI phase, for the tested engine, as well as the European diesel. INTRODUÇÃONo Brasil, o CONAMA (Conselho Nacional de Meio Ambiente) criou o PROCONVE (Programa de Controle de Emissões Veiculares por Veículos Automotores), pela Resolução CONAMA nº 18, de 06 de maio de 1986 [1]. Cronologicamente, as sucessivas edições do programa foram voltadas para uma redução gradativa, e expressiva, dos limites permitidos das emissões de poluentes por veículos automotores. Para os veículos do ciclo Diesel, a atenção prioritária recaía sobre as emissões gasosas de óxidos de nitrogênio, denominados NOx, em função das formações de NO e NO 2 , por serem irritantes pulmonares, além de serem precursores de chuvas ácidas e de ozônio. O material particulado (PM) também teve grande importância, por conter partículas prontamente respiráveis, podendo ocasionar problemas respiratórios, e por ser vetor de outros poluentes (metais pesados, compostos orgânicos carcinogênicos, etc.). Tais compostos são constituídos basicamente de hidrocarbonetos pesados presentes no óleo diesel e no óleo lubrificante, sulfatos derivados do enxofre do combustível, água e metais. Dentre os hidrocarbonetos, destacam-se os Hidrocarbonetos Aromáticos Policíclicos -HAP's, compostos supostamente mutagênicos e carcinogênicos.Em 01.10.1993, pela resolução complementar nº 08/93, foram estabelecidos limites de emissões de poluentes por veículos automotores até o ano 2000 (CONAMA P-4). No art. 15 da Resolução CONAMA nº 315/2002 [2], foram estabelecidos limites máximos de emissão de poluentes produzidos por veículos automotores pesados para a fase P-5, que entrou em vigor em 01/01/2006 e para a fase sucessiva P-6, em vigor a partir de 01/01/2009. Esta legislação estabeleceu níveis mais baixos de emissões de NOx e PM, associados a um menor consumo de combustível e a um menor nível de emissões de CO 2 . A fase P-6...

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Effect of ultra-low sulfur diesel quality on exhaust emission in euro vi diesel engine

Gomes¹,

Melo²,

Moreira³

2019

Blucher Engineering Proceedings

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“…Due to the importance of the high load and speed points in the certification test cycle relatively high EGR-rates are necessary at these points. The order of magnitude of the EGR-rate at full load is about 10-15 % [4,5,28,41].…”

Section: Figure 6 Specially Developed Egr Venturi-mixermentioning

confidence: 99%

Technical and Economical Assessment of Diesel and Gas Engine Technology for Enhanced Environmentally Friendly Vehicles (EEV)

Steen

Baert

Verbeek

2000

SAE Technical Paper Series

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“…The EGR rate determines the proportion of exhaust gas mass flow based on the total mass flow filling the engine cylinders. By changing the EGR rate the emissions can be influenced positively [7,8]. Though, a too high EGR rate causes a fouling in EGR coolers [9,10].…”

Section: Introductionmentioning

confidence: 99%

Signal Pre-Selection for Monitoring and Prediction of Vehicle Powertrain Component Aging

2019

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Predictive maintenance has become important for avoiding unplanned downtime of modern vehicles. With increasing functionality the exchanged data between Electronic Control Units (ECU) grows simultaneously rapidly. A large number of in-vehicle signals are provided for monitoring an aging process. Various components of a vehicle age due to their usage. This component aging is only visible in a certain number of in-vehicle signals. In this work, we present a signal selection method for in-vehicle signals in order to determine relevant signals to monitor and predict powertrain component aging of vehicles. Our application considers the aging of powertrain components with respect to clogging of structural components. We measure the component aging process in certain time intervals. Owing to this, unevenly spaced time series data is preprocessed to generate comparable in-vehicle data. First, we aggregate the data in certain intervals. Thus, the dynamic in-vehicle database is reduced which enables us to analyze the signals more efficiently. Secondly, we implement machine learning algorithms to generate a digital model of the measured aging process. With the help of Local Interpretable Model-Agnostic Explanations (LIME) the model gets interpretable. This allows us to extract the most relevant signals and to reduce the amount of processed data. Our results show that a certain number of in-vehicle signals are sufficient for predicting the aging process of the considered structural component. Consequently, our approach allows to reduce data transmission of in-vehicle signals with the goal of predictive maintenance.

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Cooled EGR - A Key Technology for Future Efficient HD Diesels

Cited by 84 publications

References 1 publication

Effect of ultra-low sulfur diesel quality on exhaust emission in euro vi diesel engine

Effect of ultra-low sulfur diesel quality on exhaust emission in euro vi diesel engine

Technical and Economical Assessment of Diesel and Gas Engine Technology for Enhanced Environmentally Friendly Vehicles (EEV)

Signal Pre-Selection for Monitoring and Prediction of Vehicle Powertrain Component Aging

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