KEEWAY ATV250 - Idle Speed; Slow Speed

44
3、
、、
、Idle speed
After starting the engine, the channels
of oil concentrating will close and
concentration of mixed gas become less,
then the fuel oil was absorbed into
throat pipe through idle speed hole and
transit hole. The other parts of fuel oil
was absorbed into throat pipe through
mixed proportion hole, the
concentration of mixed gas can be
adjusted by mixed proportion bolt.
4、
、、
、Slow speed
The idle oil system and main oil system
supply the mixed gas simultaneously
when engine run slowly , because the
lever plug will rise and make the oil
needle up, form negative pressure at the
main jet and the mixed gas is absorbed
out of it. It can meet the engine’s
requirement with the quantity of mixed
gas adding
5、
、、
、Middle speed( economical speed of
oil consumption)
With further speeding up the mixed gas
only was supplied by main oil system,
in the whole process the idle oil system
will not supply mixed gas because the
negative pressure is distributed
in the
throat pipe. Firstly, the air through air
hole are atomized with the fuel oil in
foam pipe, then atomized secondly in
throat pipe, it is need more gas but less
fuel oil in economical speed of oil
consumption.