The Effect of Lubricant Composition on Vehicle Exhaust Emissions

Bennett, Paul; Copp, David E.; Linna, Jan-Roger; Målberg, Henrik

doi:10.4271/972930

Cited by 6 publications

(1 citation statement)

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“…In addition, the operation time of engine test facilities will strongly be reduced with respect to conventional static methods. To elucidate the environmental aspect: Components of engine oil in the exhaust may cause failure of the catalytic converter and thus increased emission of NO x . − It is also known, that these components contribute to particulate emission to a significant content . A suitable fast measurement analysis for engine oil consumption of combustion engines will therefore contribute to a further development of automotive technology and the reduction of negative environmental influences of the motorized vehicle traffic.…”

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confidence: 99%

Dynamic Oil Consumption Measurement of Internal Combustion Engines using Laser Spectroscopy

2013

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A new approach has been developed to measure dynamic consumption of lubricant oil in an internal combustion engine. It is based on the already known technique where sulfur is used as a natural tracer of the engine oil. Since ejection of motor oil in gaseous form into the exhaust is by far the main source of engine oil consumption, detection of sulfur in the exhaust emission is a valuable way to measure engine oil consumption in a dynamic way. In earlier approaches, this is done by converting all sulfur containing chemical components into SO2 by thermal pyrolysis in a high temperature furnace at atmospheric pressure. The so-formed SO2 then is detected by broadband-UV-induced fluorescence or mass spectrometric methods. The challenge is to reach the necessary detection limit of 50 ppb. The new approach presented here includes sulfur conversion in a low-pressure discharge cell and laser-induced fluorescence with wavelength and fluorescence lifetime selection. A limit of detection down to 10 ppb at a temporal resolution in the time scale of few seconds is reached. Extensive, promising studies have been performed at a real engine test bench. Future developments of a compact, mobile device based on these improvements are discussed.

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confidence: 99%