A Systems Approach to Oil Consumption

Assessment of opportunities to increase the recovery and recycling rates of waste oils

“…Automotive manufacturers may have the greatest incentives to reduce oil consumption in service because of the beneficial side effects, which include lower tailpipe emissions of hydrocarbons and particulates, increased life of exhaust catalysts (zinc phosphates in oil additive packages are known catalyst deactivators), and improved customer perception of vehicle quality. Oil consumption may be reduced by optimizing the design of the three engine systems that consume oil: the power cylinder system, the engine overhead system, and the positive crankcase ventilation (PCV) system (Hill and Sytsma 1991). S6me examples of design improvements include using low-leakrate, positive valve stem seals in the engine overhead design; improving cylinder cooling; modiQing materials, coatings, and designs of the piston and rings; separating and enlarging flow paths within the PCV system; and installing PCV oil recovery traps.…”

Experimental Study of Lube Oil Characteristics in the PCV System and Effects on Engine Oil Consumption

“…In an effort to reduce automotive engine emissions and extend the costumers oil Recent studies have shown that the blowby oil consumption through the Positive Crankcase Ventilation (PCV) system can be significant for various engine-operating conditions [8] [9]. However, these studies lack the information about the source and characteristics of the oil in the blowby gas that flows back to the intake.…”

Dynamic Oil Consumption Measurement of Internal Combustion Engines using Laser Spectroscopy

“…All of them are based on the concept of tracers which are natural or added components of the engine oil and are refound in the exhaust emissions. This allows for measuring the total engine oil consumption since the two mechanisms “reversed-blow-by” and evaporation from the inner cylinder wall account for up to 95% of the total engine oil consumption. , Both mechanisms lead to a transfer of oil components into the combustion gases and finally the exhaust emission. A large number of substances have been used as traces such as radioactive isotopes, − halogens, , magnesium, zinc, sulfur, hydrocarbons integrated over a certain higher mass range , or the special hydrocarbon pyrene .…”

“…The most promising of the approaches cited above is based on the conversion of sulfur-containing engine oil components into well detectable SO 2 . This has been combined with several detection methods such as nondispersive IR-spectroscopy, tunable-diode laser absorption spectroscopy (TDLAS), electrochemical detection, ion–molecule-reaction mass spectrometry, or fluorescence detection. ,,, …”