Float valve

Float valve

The float valve has the task of allowing the flow of vapours towards the separator, without, however, allowing the escape of liquid fuel.

The valve contains a float, one end of which closes the valve outlet port in the following conditions:

• strong side acceleration (vehicle taking a bend) or longitudinal acceleration (vehicle braking) with the relevant movement of the mass of fuel as a result of the inertia force;
• overturning of the vehicle.

1. Normal operating conditions: valve open
2. The fuel pushes the float upwards as a result of strong acceleration: valve closed
3. Vehicle overturned: valve closed

Fuel vapour separator and multi-purpose valve

The fuel vapours coming from the tank reach the vapour separator (3), located at the side of the fuel filler, via the pipes (4).

Part of the vapours condense and return to the tank via the same pipes (4), whilst the remaining vapours escape from the separator through the multi-purpose valve (2) and are directed to the active charcoal filter via the pipe (1).

1. Pipe connecting fuel vapour separator to the active charcoal filter
2. Multi-purpose valve
3. Fuel vapour separator
4. Pipes connecting vapour separator to the fuel tank