Toro 303447 - Two-Stroke Cycle Overview

Inthe2strokecyclealleighteventsoccurintwostrok es,onerevolutionofthe crankshaft.
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Thesparkplugfiresandthepistonmovesaw ayfromthecylinderhead.
Simultaneouslytheair‐fuel‐oilinthecrankcaseiscompressed.
Asthepistonreachesthebottomofthestrok e
theexhaustportisexposed.
Cylinderpressurecausesgassestoflowouttheport.
Furthermovementofthepistonandtheintakeportisexposed
Crankcasepressurecausesair‐fuel‐oiltoflowintothecombustionchamber.
Asthepistonmovestowardsthecylinderheadtheintakeandexhaustportsarecoveredandtheair‐fuel‐
oilchargeiscompressed.
Assoonastheintakeportiscovered,furtherpistonmovementcauseslowpressureinthecrankcaseand
anewchargefillsthecrankcase.