Fuel dilution measurement is of particular interest in light of new environmental regulations imposed on today's passenger car and heavy duty engines. Our methodology is based on lubricant labelling using a new radiotracer compound, which is representative of lubricant.
As first step, a radiotracer compound is mixed to the lubricant. During the engine operation, oil continuously circulates into a measuring chamber where the signal (gamma-rays) emitted by the radiotracer is monitored. This signal is representative of the dilution process. Temperature / density effects are automatically corrected.
The methodology can be applied to gasoline, diesel and bio-fuel engines to optimize cold start procedures, for the development of post-injection strategies and of evaporation cycles.
D-Lube offers significant advantages over other methods, including:
The graph hereunder shows typical results obtained during successive dilution and evaporation phases performed on a passenger car diesel engine. Oil temperature (red signal) and fuel content in oil (blue signal, in %) are displayed on-line.
D-Lube equipment significantly reduces the time needed to optimize fuel injection strategies on I.C. engines.
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