In conventional crank case scavenged two stroke
engines, the air and fuel is mixed upstream of the
cylinder, the intake port and exhaust ports are open at
the same time, and this causes some unburned mixture
to escape from the cylinder. Direct injection
only receives air to the crank case, and fuel is injected
directly into the cylinder, so no fuel escapes
from the cylinder, thus increasing fuel economy and
reducing emissions. Precise lubrication of the reciprocating
and rotating components mitigates the
burned oil issue.
 
In conventional crank case scavenged two strokeengines, the air and fuel is mixed upstream of thecylinder, the intake port and exhaust ports are open atthe same time, and this causes some unburned mixtureto escape from the cylinder. Direct injectiononly receives air to the crank case, and fuel is injecteddirectly into the cylinder, so no fuel escapesfrom the cylinder, thus increasing fuel economy andreducing emissions. Precise lubrication of the reciprocatingand rotating components mitigates theburned oil issue.
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