Volvo S90 Operation Manual page 124

1998 Volvo S90
into the atmosphere. The system consists of a
system of hoses in the fuel tank, a "Roll-Over"
valve on the cross-member forward of the fuel
tank, a carbon filter canister in the engine
compartment which binds the fuel vapors, and an
electric valve which, when necessary, empties the
canister in the engine compartment of evaporated
fuel and routes it into the engine.
file:///K|/ownersdocs/1998/1998_SV90/98S90_108.htm (6 of 6)12/30/2006 1:52:49 PM
Crankcase ventilation
The engine is provided with positive crankcase
ventilation which prevents crankcase gases from
being released into the atmosphere. Instead, the
crankcase gases are admitted to the intake
manifold and cylinders.
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