| 摘要 |
A terminal device (11) stores, in a storage means (114), sulfuric acid condensation intensity acquired by a sulfuric acid condensation intensity acquisition means (111). The sulfuric acid condensation intensity is an index value indicating the ease in which sulfuric acid condensation occurs in a cylinder, and is specified in advance according to a load of an engine. A load index value acquisition means (112) acquires a current load index of an engine. An attribute value acquisition means (113) acquires an attribute value (the amount of sulfur included in a fuel oil, the amount of calcium included in a cylinder lubricant oil, or the like) affecting the current sulfuric acid concentration in the cylinder. A low-temperature corrosion rate specifying means (115) reads, from the storage means (114), the sulfuric acid condensation intensity according to the load index value acquired by the load index value acquisition means (112), and specifies the low-temperature corrosion rate of a cylinder liner on the basis of the read sulfuric acid condensation intensity and the attribute value acquired by the attribute value acquisition means (113). An abrasion amount specifying means (116) specifies the abrasion amount of the cylinder liner on the basis of the low-temperature corrosion rate specified by the low-temperature corrosion amount specifying means (115). |
