Effect of Crankcase Oil on the Particle Size Distribution and Total Number Concentration in a Heavy Duty CNG Engine

Vijayakumar, Vishnu; Tyagi, Bhuvenesh; Mathai, Reji; Singh, Shyam; Sehgal, Ajay Kumar

doi:10.4271/2015-01-2041

Cited by 6 publications

(2 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…associated to lubricant oil [37,40,51,52,54,77,78]. In a recent work by Amirante et al [38], the formation of particles produced solely from lubricant oil was demonstrated by means of experimental tests designed for that very purpose.…”

Section: Resultsmentioning

confidence: 99%

“…On the other hand, lubricating oil can reach the exhaust stream, for instance escaping from the turbocharger bearings lubricating circuit, and determine a direct increase of the number of the finest particles. There are many studies in which the high emission levels of very fine particles in CNG engines are indirectly associated to lubricant oil [37,40,51,52,54,77,78]. In a recent work by Amirante et al [38], the formation of particles produced solely from lubricant oil was demonstrated by means of experimental tests designed for that very purpose.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Evolution of Soot Particle Number, Mass and Size Distribution along the Exhaust Line of a Heavy-Duty Engine Fueled with Compressed Natural Gas

et al. 2020

View full text Add to dashboard Cite

An experimental study has been conducted to provide a characterization of the transformations that particle size distributions and the number density of soot particles can encounter along the exhaust line of a modern EURO VI compliant heavy-duty engine, fueled with compressed natural gas. Being aware of the particles history in the exhausts can be of utmost importance to understand soot formation and oxidation dynamics, so that, new strategies for further reducing these emissions can be formulated and present and future regulations met. To this purpose, particle samples were collected from several points along the exhaust pipe, namely upstream and downstream of each device the exhaust gases interact with. The engine was turbocharged and equipped with a two-stage after-treatment system. The measurements were carried out in steady conditions while the engine operated in stoichiometric conditions. Particle emissions were measured using a fast-response particle size spectrometer (DMS500) so that size information was analyzed in the range between 5 and 1000 nm. Particle mass information was derived from size distribution data using a correlation available in the literature. The reported results provide more insight on the particle emission process related to natural gas engines and, in particular, point out the effects that the turbine and the after-treatment devices produce on soot particles. Furthermore, the reported observations suggest that soot particles might not derive only from the fuel, namely, external sources, such as lubricant oil, might have a relevant role in soot formation.

show abstract