Estimation device and control device for combustion system

An estimation device applicable to a combustion system including an internal combustion engine, the estimation device comprising:

• a mixing acquisition unit to acquire a mixing ratio of various components contained in the fuel used for combustion in the internal combustion engine;
• a main penetration force estimation unit to estimate a penetration force of the fuel injected into a combustion chamber of the internal combustion engine by a main injection, based on the mixing ratio acquired by the mixing acquisition unit;
• and
• an after penetration force estimation unit to estimate a penetration force of the fuel injected into the combustion chamber by the after injection, based on the mixing ratio, after the main injection in one combustion cycle.

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

• a mixing acquisition unit to acquire a mixing ratio of various components contained in a fuel used for combustion in the internal combustion engine;
• a main region estimation unit to estimate a combustion region of the fuel as a main combustion region for a main combustion produced by injecting the fuel into a combustion chamber of the internal combustion engine by a main injection, based on the mixing ratio acquired by the mixing acquisition unit;
• an after region estimation unit to estimate an injection region of the fuel as the after combustion region based on the mixing ratio, for an after combustion produced by injecting the fuel into the combustion chamber by an after injection, after the main injection in one combustion cycle;
• and
• a combustion control unit to control the combustion system based on respective estimation results of the main region estimation unit and the after region estimation unit.