Fuel injection system

A fuel injection system for mixture-compressing internal combustion engines with externally supplied ignition, comprises at least one metering valve, disposed in a fuel supply line which is at system pressure, for metering fuel in accordance with engine operating characteristics, said at least one metering valve having a control piston displaceable in a metering sleeve that has a metering slit for each cylinder of said engine, the control piston being acted upon by a control pressure established in accordance with the engine operating characteristics thereby and uncovering a corresponding cross section of the metering slits toward a fuel supply line to a greater or lesser extent, and having a differential pressure valve connected to each metering slit, the differential pressure valve communicating on the outlet side with an injection valve, wherein the metering sleeve has on one end face of the control piston a fuel supply chamber, connected to the fuel supply line, and on its opposite end a control chamber communicating with a pressure adjuster generating a control pressure, the control chamber communicating via a first throttle with a fuel return line, said first throttle having a very small flow cross section, and a second throttle connected in parallel with said first throttle, said second throttle having a substantially larger flow cross section in series with a blocking valve operated by a control device.