This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
The SMAC, Under Pressure Oil Aeration Measurement System in Running Engines
Technical Paper
2000-01-1818
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Gas entrainment in engine oil circuit generates many problems. This is especially true for hydraulic tappets. A new oil gas content measurement apparatus, the SMAC, has been developed by IFP and D2T. It is able to measure the volumetric gas to oil ratio at any point of the engine oil circuit while running, without influencing the pressure or temperature of the oil. Some engine tests have been conducted with PSA. First results show that a steady gas content is achieved only slowly. Gas content is very sensitive to engine speed and oil temperature (i.e. running point effect). Gas content is very different from one location to another in the oil circuit (i.e. architecture effect). Oil formulation also influences gas content (i.e. oil effect) and the SMAC method does not rank the oils in the same way as the ASTM methods.
Recommended Content
Authors
Topic
Citation
Brégent, R., Porot, P., Monchaux, E., and Cailliez, J., "The SMAC, Under Pressure Oil Aeration Measurement System in Running Engines," SAE Technical Paper 2000-01-1818, 2000, https://doi.org/10.4271/2000-01-1818.Also In
References
- Porot P. Trapy J. «A Numerical and Experimental Study of the Effect of Aeration of Oil on Valve Trains Equipped with Hydraulic Lash Adjusters» SAE Paper 930997 (SP-956)
- Porot P. «Un nouveau moyen de mesure absolue du taux gazeux des mélanges gaz-liquides: le SMAC» Revue de l'Institut Français du Pétrole 50 6 novembre-décembre 1995
- Harlow A. «IL - 061 Round - Robin 1997/1998 - Summary for ELTC 1998 Spring Meeting»
- Standard Test Method ASTM D3427 «Air Release Value»
- Standard Test Method ASTM D892 «Foaming Characteristics of Lubricating Oils»
- Standard Test Method ASTM D6082 «High Temperature Foaming Characteristics of Lubricating Oils»