Mazda CX-9 2007 - Air Filter Construction;Operation; Fuel Shut-Off Valve; Fuel Shut-Off Valve Construction;Operation; Rollover Valve

EMISSION SYSTEM [MZI-3.5]
01-16–9
01-16
AIR FILTER CONSTRUCTION/OPERATION [MZI-3.5]
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• The air filter is located in the canister vent (CV)
solenoid valve on the atmosphere side.
End Of Sie
NG: FUEL SHUT-OFF VALVE
FUEL SHUT-OFF VALVE FUNCTION [MZI-3.5]
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• The fuel shut-off valve prevents fuel from flowing to the charcoal canister during tight turns or vehicle rollover.
• The fuel shut-off valve releases evaporative gas to the charcoal canister.
• During refueling, the fuel shut-off valve closes to prevent a fuel overflow.
End Of Sie
FUEL SHUT-OFF VALVE CONSTRUCTION/OPERATION [MZI-3.5]
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• The fuel shut-off valve is built into the fuel tank.
• The fuel shut-off valve mainly consists of a valve, float, spring, and by-pass valve.
• During refueling or due to fuel sloshing, the float is flooded with fuel and the floating force causes the valve to
close. Also, during vehicle rollover, the valve closes due to balance between the float gravity and spring.
End Of Sie
NG: ROLLOVER VALVE
ROLLOVER VALVE FUNCTION [MZI-3.5]
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• The rollover valve prevents fuel flow into the evaporative gas passage during sudden cornering or vehicle
rollover.
End Of Sie
ROLLOVER VALVE CONSTRUCTION/OPERATION [MZI-3.5]
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• When the fuel flows into the rollover valve, the float (valve) closes the flow passage by relation of float weight,
spring force and float floating force.
AIR FILTER
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SHUT OFFOPEN
TO CHARCOAL
CANISTER
FROM ROLLOVER
VALVE
FROM ROLLOVER
VALVE
TO CHARCOAL
CANISTER
FLOAT
SPRING
SPRING
FLOAT
VALVE
BY-PASS
VALVE
BY-PASS
VALVE
VALVE
: EVAPORATIVE GAS
FUEL
LEVEL
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SPRING
FLOAT
FUEL LEVEL
: EVAPORATIVE GAS FLOW
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