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New Generation N62 Engine Chapter 6 P.4

Course Contents/Background Material

The following filler neck measures prevent the escape of fuel

vapours during refuelling:

A spring-loaded cap locks the filler neck from the outside, even

if the fuel filler cap has been opened. The filler neck is designed

so that the incoming fuel functions like a venturi tube during

refuelling and also draws external air into the tank so that no fuel

vapours can escape during this stage either.

The tank pressure must not exceed the pump nozzle cut-out

pressure as a result of the extra air flowing into the tank, even at

the maximum delivery rate. This could otherwise cause the

pump nozzle to cut-out early.

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BMW N62 Series Specifications

General