Patent ID: 7475679

Claim:
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 ).