Two complementary oil analysis systems for thermal engine development 2000-05-0164
A complete solution to approach the problem of oil measurement
on a thermal engine is described: - Aeration with the SMAC from D2T
Group and developed under French Petrol Institute (IFP) License -
Composition with the Oil Sample Analysis OSA2.
The SMAC is a measurement system of aeration based on the
difference of gas compressibility and oil compressibility.
The system is connected in serial or in parallel with the engine
and an oil small sample is isolated to be analyzed in the
The SMAC offers the possibility to measure aeration level in
each part of the oil thermal engine circuit in few minutes,
quantify oil effect on hydraulic push rod and variable valve
The OSA is actually two instruments in one: optical emission
spectrometer and an infrared spectrometer.
The optical emission spectrometers burns a portion of the oil
sample and measures sub-microscopic metals. These metals are
present due to component wear inside the engine that is being
The infrared spectrometer scans a portion of the oil sample
measures physical properties and contaminants. The onboard computer
control both spectrometers, combines the results from each and
gives a report with wear metals, contaminants and other physical
data like fuel dilution, oxidation, nitration, viscosity and
With the OSA, engineers have the ability to decide, based on
scientific data, whether potential engine problems would exist.
The OSA offers a solution to this problem by providing an
evaluation for the probability of a potential failure within few
minutes, in comparison to the traditional commercial
Nicolas Drecq, Stéphane Lafond
SAE - D2T Group Z.A. de Trappes-Elancourt, BSF - D2T Group Z.A. de Trappes-Elancourt