Concept for Analysing and Optimising Oil Emission

Hadler, Jens; Lensch-Franzen, Christian; Gohl, Marcus; Mink, Tobias

doi:10.1007/s38313-014-0006-2

Cited by 3 publications

(6 citation statements)

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“…Generally speaking, the results show the necessity to co-develop piston rings and cylinder liners in a way that the rings are able to seal the combustion chamber under all relevant operation conditions with low lube oil consumption. This was described by the above as well as Hadler et al 9 There is a wide number of measures that can be combined to achieve these goals: From the cylinder liner's perspective the honing was developed further a lot. Modern honing techniques from plateau honing to spiral glide honing to contour honing have found their way into the market.…”

Section: Oil Emissionsmentioning

confidence: 99%

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Investigation of oil emission mechanisms in a marine medium-speed dual-fuel engine

Hochfellner,

Wirz,

Pryymak

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part M:

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Pilot-ignition Otto marine engines are known for greatly reduced emissions of air pollutants (sulphur oxides, nitrogen oxide, particulates) compared to marine diesel engines. However, lubricating oil emissions still are about one order of magnitude higher than in land-based systems. To identify reduction potentials, a better understanding of oil emission mechanisms has to be gained. For this purpose, mass spectrometric oil emission measurements and fluorescence lubricating film thickness measurements were performed on a medium-speed marine engine. With the fluorescence measuring system, the varying lubricating oil film on the cylinder wall can be visualised and analysed in sub-crank-angle resolution. By applying the developed calibration method to the measurement data, the oil film thickness can be determined in µm. It is shown that the oil film left by the piston rings on the liner as it moves down is almost halved after ignition compared to during intake stroke. The authors have further been able to detect and time operating point dependent ring rotation and investigations show a connection between ring rotation and cylinder liner temperature distribution. Aligning ring gaps allow blow-by to happen. This and other high intensity events such as engine knock, load shedding or the transition from diesel-mode to gas-mode, heavily disturb the oil layer and cause peaking oil emissions.

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Section: Oil Emissionsmentioning

confidence: 99%

“…Mass spectrometric oil emission measurement is widely used in research and development in the field of passenger car engines. Due to the high temporal resolution of this method, not only steady-state but also transient engine operation can be investigated, see Hadler et al, 9 Mahle, 19 Frommer et al 20…”

Section: Approachmentioning

confidence: 99%

Investigation of oil emission mechanisms in a marine medium-speed dual-fuel engine

Hochfellner,

Wirz,

Pryymak

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part M:

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“…The reasons of modified PSD-shapes with those fuels at engine-out are first of all: the higher oxygen content of the fuels and the modified chemistry of the nanoaerosol (especially the heaviest HC-fraction/SOF). For this modified chemistry the interaction of fuel with the lube oil layer in the combustion chambers plays a very important role [22,23].…”

Section: Comparisons Of Emissions Of Vehicles With Older and With Newmentioning

confidence: 99%

“…An important problem by application of alternative, and biogene fuels in diesel engines, is the lubricity (concerning the injection system) and the long-term impact on lube oil [20][21][22][23]. For butanol special lubricating additives can be applied.…”

Section: Introductionmentioning

confidence: 99%

Non-Regulated Emissions and PN of Two Passenger Cars with Diesel-Butanol Blends

Engelmann¹,

Comte²,

Czerwiński³

et al. 2020

Combustion Engines

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Biofuels represent one of the alternatives to obtain the CO2-neutral propulsion of IC-engines. Butanol, which can be produced from biomass, is considered and was investigated in the last years due to the very advantageous characteristics of this alternative fuel. Butanol can be easily and irreversibly blended both with light (gasoline) and heavier (Diesel) fuels. Comparing with ethanol it has the advantages of: higher calorific value, lower hygroscopicity and lower corrosivity. It can replace the aviation fuels. This paper presents the emission results obtained on two Diesel passenger cars with different technology (Euro2 and Euro6c) and with addition of Butanol to Diesel fuel, as a part of the research project DiBut (Diesel and Butanol). Interesting results are given about some non-legislated (non-regulated) components, Acetaldehyde (MeCHO) and Formaldehyde (HCHO) and about the PN-emissions with/without DPF.

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“…To evaluate the different influences on the emissions behaviour, both stationary maps over load and engine speed and individual synthetic operating profiles as NEDC and real driving cycles are examined [6].…”

Section: Examination Of Dynamic Driving Cyclesmentioning

confidence: 99%