| abstract |
The invention relates to a method and a device for monitoring at least one supply valve for supplying fuel to an internal combustion engine for a malfunction and / or damage or leakage. For this purpose, a shut-off valve is arranged in the fuel supply upstream of the actual mixture formation or metering valves, which is always open during normal engine operation and is only closed when there is no injection or injection. Between the shut-off valve and the metering valves, a sensor is arranged in the fuel supply, with which a pressure drop is monitored during the thrust cut-off of the internal combustion engine. The tightness of the downstream metering valves can be concluded from the pressure change. The method and the device enable the function or the tightness of one or more supply valves for fueling an internal combustion engine, such as. B. mixture formation, metering, injection or injection valves, an internal combustion engine reliably, accurately and with little effort. |