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Rapid Monitoring of Oil-Emission By Mass Spectrometry: a New Tool in Engine Development
Technical Paper
2004-05-0408
Sector:
Language:
English
Abstract
Increasing environmental concern is leading to the reduction of
permissible regulated vehicle exhaust emissions. A series of
emission reduction targets were set and must be met by motor
vehicle manufacturers in the near future. Crucial exhaust emission
parameters that must be met is the hydrocarbon emission as well as
the particulate mass emission. These originate from unburnt fuel
and lubricants that enter the combustion chamber either
intentionally as fuel or unintentionally from the lubricating
oil.
For a better understanding of the process generating pollutants,
the emissions of every phase of the combustion cycle have to be
monitored online. Moreover, it is important to measure the raw
exhaust gas during different driving cycles and investigate the
influence of different parameters as, for example, changing engine
operating conditions. The new mass spectrometer (MS)-based
measurement system LUBRISENSE (Airsense Automotive GmbH) allows the
direct detection of unburned gaseous oil HC without the use of
costly tracer materials. The gas inlet system enables crank
angle-resolved monitoring of different raw exhaust gas compounds in
the exhaust manifold or directly in the cylinder.
By means of an integration method a complete oil emission map of
72 points of operation is received in one day instead of several
weeks with conventional methods. Besides engine mapping and
monitoring of oil emission during driving cycles and dynamic engine
operation, it is possible to investigate different parameters like:
Oil consumption mechanisms, Mechanical engine design,
Cylinder-to-cylinder oil emission, and Lubricant formulation.
Rapid online measurement with the system LUBRISENSE will yield
further information to understand the process generating oil
emission within the combustion chamber. It shall be pointed out,
that by applying this new technology many more challenging tasks in
measurement of raw exhaust gas or even in tailpipe emissions can be
solved.