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※ Improvement of engine
Middle spark plug ,semicircular combustion chamber and improvement of compression ratio， ignition time，
such improvement in exhaust system alone has achieved high intake and exhaust efficiency which enables
increase of combustion efficiency.
※ Air induction device
Introduce the air into the vent-pipe so that the CO and HC incomplete combustion could be turned into
innocuous gas in the second reaction.
Difference Device Constituting part Objective and function
Exhaust
system
Catalyst device Catalyst converter
Canned oxygenation catalyst installed in
the center of the vent pipe enables the
oxygenation of CO, HC and NOX.
—Adjustable parameters and suggested set value
·Idle adjustment- engine speed 1750±100rpm/min
CO concentration 0.5-1.0％
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