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The Introduction of Alternative Fuels for Conventional Diesel Engines
Technical Paper
785006
Sector:
Language:
German
Abstract
Combined spark-ignition fuel/Diesel fuel operation in Diesel
engines is possible if the former fuel is fed into the intake
manifold and combustion itself is introduced through direct
injection of Diesel fuel into the combustion chamber. The
investigation sought to define the limits of partial spark-ignition
fuel operation when used in conjunction with a STEYR central-spin
combustion system; performance and exhaust characteristics were of
particular interest.
Experimental results showed that the proportion of methanol to
Diesel fuel dropped with decreasing engine loading and had to be
eliminated totally at low loading; a similar relation was
determined between methanol proportion and engine speed. Engine
performance was best at high RPM. CO, CH, and other undesirable
emissions were worse when spark-ignition fuel of any kind was
added. Methanol's beneficial effect on carbon deposits was
noted. Combustion rates, operations, and peak pressures are
compared between methanol, gasoline, and Diesel fuel introduction
into the intake manifold