Fuel supply system for an internal combustion engine

A fuel supply system for a spark-ignition internal combustion engine (1), having at least one cylinder (2) defining a combustion chamber (5), each including a blow-in valve (3) with a blow-in nozzle (4) for blowing a mixture of a liquid fuel and a pressurized combustion gas into the combustion chamber (5) by way of the blow-in nozzle (4), the blow-in valve (3) comprising a nozzle housing (29) having a pressure connection (6) for the introduction of the pressurized combustion gas into the nozzle housing (29) with the pressure of the combustion gas being provided by an external pressure source (7) and the blow-in valve (3) further including a piston/cylinder unit for delivering a metered quantity of liquid fuel, comprising a piston (12), a cooperating plunger (8) and a nozzle needle (9) arranged for actuation by the plunger (8), the plunger being actuated by an operating mechanism for the injection of the metered amount of fuel together with combustion gas into the combustion chamber (5), the piston (12) of the piston cylinder unit being arranged between the plunger (8) and the nozzle needle (9) coaxially with respect thereto, with a fuel chamber (13) for metering and delivering a fuel quantity which is to be blown into the combustion chamber (5) being formed between the plunger (8) and the valve piston (12), the plunger (8) forming a first slot controller (10) for controlling a fuel supply (14) into the fuel chamber (13), and the valve piston (12) forming a second slot controller (11) for a fuel line (15) extending from the fuel chamber (13) to the blow-in nozzle (4), and the first and second slot controllers (10, 11) being coordinated with one another in such a way that, at the end of metering and delivering the fuel quantity which is to be blown in, the plunger (8) abuts the valve piston (12).