FUEL PRESSURE ESTIMATION SYSTEM

A fuel pressure estimation system is used in an engine device including an engine having a fuel injection valve and a fuel supply device having a fuel pump for supplying fuel in a fuel tank to a supply pipe. The fuel pressure estimation system estimates a fuel pressure variable relating to a fuel pressure in the supply pipe, and estimates a fuel pressure variable relating to a fuel pressure in the supply pipe. A storage device and an execution device are provided. The storage device stores a first map having, as an input, a first input variable including a pump variable, a consumption flow rate variable relating to a consumption flow rate of fuel, and a property variable relating to a property of the fuel, and having, as an output, a fuel pressure variable. In addition, the execution device acquires a first input variable, applies the acquired first input variable to the first map, and estimates a fuel pressure variable. 燃压推定系统用于发动机装置，所述发动机装置包括发动机和燃料供给装置，所述发动机具有燃料喷射阀，所述燃料供给装置具有将燃料箱内的燃料向供给管供给的燃料泵，所述燃压推定系统推定与所述