• Video
  • 18-Jun-2012 12:28 EDT

Impact of Biodiesel on Particle Emissions and DPF Regeneration Management in a Euro5 Automotive Diesel Engine

00:16:16
Length:

Purchase Required to View Video

Short Preview Below

Biofuel usage is increasingly expanding thanks to its significant contribution to a well-to-wheel (WTW) reduction of greenhouse gas (GHG) emissions. In addition, stringent emission standards make mandatory the use of Diesel Particulate Filter (DPF) for the particulate emissions control.

The different physical properties and chemical composition of biofuels impact the overall engine behaviour. In particular, the PM emissions and the related DPF regeneration strategy are clearly affected by biofuel usage due mainly to its higher oxygen content and lower low heating value (LHV). More specifically, the PM emissions and the related DPF regeneration strategy are clearly affected by biofuel usage due mainly to its higher oxygen content and lower low heating value, respectively. The particle emissions, in fact, are lower mainly because of the higher oxygen content. Subsequently less frequent regenerations are required. On the other hand, as a consequence of the lower LHV of the RME, a larger amount of post - injected fuel is required for the achievement of the right temperature inside the DPF for the oxidation of the soot cake. This could generally result in to a larger oil dilution, a higher smoking and an increment of fuel consumption.

Aim of the paper is the characterization of the particle emissions in terms of mass, size and number during the regeneration of a Close Coupled DPF (CCDPF). The measurements were performed at the exhaust of a 2.0l Euro5 CR GM Diesel engine fuelled both with conventional diesel fuel (RF) and Rapeseed Methyl Ester (RME). The investigation was carried out at a steady state engine operating point (2750rpm 12bar BMEP) representative of a typical extraurban driving condition. The regeneration was performed using an actual regeneration strategy adopted in the last generation diesel engine for RF and a modified one for RME. The particulate emissions were characterized by means of a microsoot sensor, for the mass concentration measurement, and a DMS500, for the particle sizing and counting.

The results pointed out the benefit of the use of biodiesel on the out DPF particulate emissions and its drawbacks on the management of the regeneration process. In particular, lower particle emissions are observed both during and after the regeneration event. Furthermore, it was observed that the use of RME requires a flexible ?management system? that allows the adjustment of the injection strategy according to the fuel properties in order to activate the process and guarantee the complete filter regeneration.

Presenter
Silvana Di Iorio, Istituto Motori CNR

Buy
Select
Price
List
Purchase to View
$19.00
Learn More
Share
HTML for Linking to Page
Page URL
Grade
Rate It
No ratings yet

View More Video

Video
2012-02-01
Watlow and EmiSense Technologies, LLC are commercializing an improved electronic particulate matter (PM) sensor that has real-time measurement capability and improved sensitivity. To demonstrate the capability of this improved sensor of on board diagnostics (OBD) for failure detection of diesel particle filters (DPF), independent measurements were performed by university of California Riverside (UCR) and by Southwest Research Institute (SwRI) to characterize the engine PM emissions and to compare with the PM sensor response. In situ PM measurements from PM sensors correlate well with real-time gravimetric measurements. In addition, particle size and particle number data are presented and discussed.Due to an improved design update, the sensitivity of the sensor could have been significantly increased.
Video
2012-02-16
This session focuses on particle emissions from combustion engines, including measurement methods and fuel effects. Presenter Leonidas D. Ntziachristos, Aristotle University Thessaloniki
Video
2012-06-18
The aim of this paper is to analyse the quantitative impact of fuel sulphur content on particulate oxidation catalyst (POC) functionality, focusing on soot emission reduction and the ability to regenerate. Studies were conducted on fuels containing three different levels of sulphur, covering the range of 6 to 340 parts per million, for a light-duty application. The data presented in this paper provide further insights into the specific issues associated with usage of a POC with fuels of higher sulphur content. A 48-hour loading phase was performed for each fuel, during which filter smoke number, temperature and back-pressure were all observed to vary depending on the fuel sulphur level. The Fuel Sulphur Content (FSC) affected also soot particle size distributions (particle number and size) so that with FSC 6 ppm the soot particle concentration was lower than with FSC 65 and 340, both upstream and downstream of the POC.
Video
2012-06-18
All internal combustion piston engines emit solid nanoparticles. Some are soot particles resulting from incomplete combustion of fuels, or lube oil. Some particles are metal compounds, most probably metal oxides. A major source of metal compound particles is engine abrasion. The lube oil transports these abraded particles into the combustion zone. There they are partially vaporized and ultrafine oxide particles formed through nucleation [1]. Other sources are the metallic additives to the lube oil, metallic additives in the fuel, and debris from the catalytic coatings in the exhaust-gas emission control devices. The formation process results in extremely fine particles, typically smaller than 50 nm. Thus they intrude through the alveolar membranes directly into the human organism. The consequent health risk necessitates a careful investigation of these emissions and effective curtailment.

Related Items

Training / Education
2005-02-03