A fuel property determination device, a combustion control device, a fuel property determination method, and a computer program

摘要

Provided is a fuel property determining apparatus for an engine that retards a fuel injection timing and determines a fuel property based on a combustion change of the engine caused by the deceleration. The apparatus includes first determination module for setting a delay amount to a first determination amount in an early stage of the fuel property determination, and in a case where the change is above a first predetermined value when the first determination amount is set, suspending the deceleration and determining that Fuel property is a first fuel property, and a second determination module for setting the delay amount to a second setting amount in a case where the change is below the first predetermined value when the first setting amount is set, and determining the fuel property based on the change causing becomes when the second setting amount is set, wherein the second setting amount is larger than the first setting amount.