Stihl TS 410 - THE OPERATOR; Physical Condition

Technical Information 37.2007 Page 5
TI_37_2007_30_01_02.fm
1.2.2 Compression and intake
Fresh fuel-air mixture (
--- arrows) streams into the crankcase. At the same time, the piston opens the fuel-
free air port (2) via the control slot (1) in the piston skirt and fresh air (
::: arrows) streams through the control
slot into the transfer ports (3). The fuel-air mixture in the combustion chamber is compressed.
1.2.3 Expansion and crankcase compression
Shortly before the piston reaches top dead center (TDC), the mixture is ignited by the spark plug.
The fuel-free air (
::: arrows) in the transfer ports and the fuel-air mixture (--- arrows) in the crankcase are
then compressed as the piston travels downward.
000TI044 KN
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2
3
2
3
2
1
000TI045 KN