The verification process is applied to an injection system (1) for an internal combustion engine (BKM) with at least two separately stored types of fuel (KS1, KS2). When the second type of fuel is supplied, or when the supply is changed from the first type...

There may be two tanks (KS1,KS2) containing different types of fuel, fed through lines (KL1,KL2) to a first valve (3). This may mix the two fuels and passes the mixture to a feed pump (4). A second valve (5) returns fuel (2) to one of the tanks. Fuel is fe...