| 摘要 |
The invention relates to a method for diagnosing the fuel supply system of an internal combustion engine which operates, preferably, by gas and/or bivalently. Diagnosis devices which detect leakages due to pressure tests in the tank or in the entire system are already known. The aim of the invention is to enable the fuel supply system to be diagnosed in a highly economical manner, within a short space of time and whilst the internal combustion engine is operated. Temperature fluctuations and pressure conditions during the operation of the internal combustion engine should also be taken into account. According to the invention, the fuel pressure test takes place in individually closed volumes of the fuel supply system, wherein, preferably, defined partial areas of the supply system are separated by means of individually separates valves (7, 8) and are diagnosed by means of pressure tests. |
