Combustion system estimation device and control device

A control device applicable to a combustion system having an internal combustion engine, comprising:

• a mixing acquisition unit to acquire a mixing ratio of various components contained in fuel used for combustion in the internal combustion engine;
• a combustion amount estimation unit to estimate a combustion amount of the fuel caused by a post-combustion generated by injecting the fuel into a combustion chamber of the internal combustion engine by post injection, based on the mixing ratio acquired by the mixing acquisition unit;
• a region estimation unit to estimate a combustion region of the post combustion in the combustion chamber based on the mixing ratio;
• a timing estimation unit to estimate an ignition timing, at which ignition occurs in the combustion chamber by the post injection, based on the mixing ratio;
• and
• a combustion control unit to control the combustion system based on respective estimation results of the combustion amount estimation unit, the region estimation unit, and the timing estimation unit.