METHOD AND EVALUATION UNIT FOR DETECTING A MALFUNCTION OF A FUEL SYSTEM OF AN INTERNAL COMBUSTION ENGINE

The invention relates to an evaluation unit for a fuel system for providing fuel for operating an internal combustion engine. The fuel system comprises a fuel pump which is configured to feed fuel into a fuel accumulator, and one or more injection nozzles which are configured to feed fuel from the fuel accumulator into one or more cylinders of the internal combustion engine. The evaluation unit is configured to determine pressure data relating to a physical pressure in the fuel accumulator during the operation of the fuel system at a sampling time. Furthermore, the evaluation unit is configured to determine a change in reference pressure on the basis of a reference model of the fuel system, and to detect a defect in the fuel system on the basis of the pressure data and the change in reference pressure. 本发明涉及一种用于为内燃机的运行提供燃料的燃料系统的评估单元。所述燃料系统包括燃料泵，其构造用于将燃料输送到燃料储存器中，并且所述燃料系统包括一个或多个喷嘴，其构造用于将燃料从燃料储存器输送到内燃机的一个或多个气缸中。所述评估单元构造用于在燃料系统运行期间在采样时间点确定与燃料储存器中的物理压力相关的压力数据。此外，评估单元构造用于借助燃料系统的参考模型来确定参考压力变化并且基于压力数据和参考压力变化来检测燃料系统的