NDLI: Reduction of Particle Number and Mass Emissions of a Modern Off-Road Diesel Engine

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Niemi, Seppo Pippola, Jukka Nousiainen, Pekka Laure´n, Mika
Copyright Year	2009
Abstract	The oxides of nitrogen (NOx) and particulate matter (PM) form the main challenge for diesel engine exhaust cleaning. Despite the emissions reduction, the fuel economy should be kept at a sufficient level to also prevent CO2 increase. In the present project, a turbocharged, inter-cooled, common-rail, direct-injection, off-road diesel engine, largely used in tractors, forest machines etc., is optimized to make the engine comply with the US EPA Tier 4i/4 emissions legislation. The present study focused on pulse turbocharging and open-flow or partial diesel particulate filter system (pDPF). PM mass and PM number concentrations were determined both up- and downstream the pDPF. The engine was operated according to the steady and transient non-road emissions cycles (NRSC, Non-Road Steady Cycle; NRTC, Non-Road Transient Cycle, respectively). The main aim of the current study was to reduce PM emissions since a catalyst based on SCR technology was selected for NOx removal. Clear benefits in PM emissions were achieved with pulse turbocharging, especially during the transient engine operation. A very slight increase in the brake specific NOx (BSNOx) was detected with both studied pulse manifolds while PM decreased by 20% or more. CO also decreased clearly with Pulse 1 but HC remained almost constant. The opacity peaks recorded during the NRTC measurement also decreased considerably compared with the baseline constant-pressure turbocharging. The pDPF also proved efficient both for particle number levels and PM mass. In steady-state engine operation, the DOC containing filter system removed exhaust CO and HC effectively. BSNOx also decreased slightly. The exhaust particle number generally decreased usually the more, the larger the particles. Over the transient cycle with the pDPF, the weighed PM decreased by 77% and was clearly below the US EPA Tier 4i limit. The filter also reduced smoke opacity peaks effectively. The BSNOx decreased more than in the steady cycle, as did CO and HC.
Sponsorship	Internal Combustion Engine Division
Starting Page	255
Ending Page	265
Page Count	11
File Format	PDF
ISBN	9780791843635
DOI	10.1115/ICEF2009-14011
e-ISBN	9780791838587
Conference Proceedings	ASME 2009 Internal Combustion Engine Division Fall Technical Conference
Language	English
Publisher Date	2009-09-27
Publisher Place	Lucerne, Switzerland
Access Restriction	Subscribed
Subject Keyword	Diesel engine Particulate filter Exhaust emissions Transient cycle Turbocharging Cycles Filters Diesel engines Roads Particulate matter Emissions Exhaust systems Transients (dynamics)
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in