Page 4 Technical Information 37.2007
TI_37_2007_30_01_02.fm
1.2 Principle of operation, stratified
scavenging
A cushion of air (fuel-free) separates the unburned
fuel-air mixture from the exhaust gas. This cushion
of air is located in front of the fuel-air mixture. At the
start of the exhaust and scavenging cycle, fuel-free
air enters from the transfer ports into the combustion
chamber and scavenges the exhaust gas into the
exhaust port. The fuel-free air prevents the
unburned fuel-air mixture from entering the exhaust
port, thus reducing the environmental impact by
reducing scavenging losses and fuel consumption.
1.2.1 Mechanical design
The fuel-air port (1) is separate from the fresh air
ports (2). An integrally molded control slot (4) in the
piston skirt opens and closes the connection
between fresh air ports (2) and transfer ports (3).
1
2
3
4
000TI043 KN
To Next Page
Loading...
