Control device for internal combustion engine and control method for internal combustion engine
AssigneeYanmar Co., Ltd.
InventorGo ASAI
Life of this patent
Estimating the term…
Abstract
An internal combustion engine in which when the gas temperature of a fuel reformation chamber when a piston in a fuel reformation cylinder reaches the compression top dead point is estimated to be equal to or higher than a soot generation lower limit temperature set according to an equivalence ratio of the fuel reformation chamber, a reaction gas temperature adjusting operation for suppressing or reducing an increase in the reaction gas temperature in the fuel reformation chamber is executed. Further, a closing timing of an air-intake valve is changed to reduce an effective compression ratio of the fuel reformation chamber.
Claims6
A control device for an internal combustion engine including a fuel reformation cylinder and an output cylinder to which reformed fuel generated in the fuel reforming cylinder is supplied, the output cylinder being configured to yield an engine power by combusting the reformed fuel, the control device comprising:
- a reaction gas temperature adjustment unit configured to adjust a reaction gas temperature in the fuel reformation cylinder according to an equivalence ratio in the fuel reformation cylinder so that the equivalence ratio and the reaction gas temperature in the fuel reformation cylinder at a time of fuel reformation are in a reforming reaction possible range but outside a soot generation range, the soot generation range being defined by the equivalence ratio and the reaction gas temperature in the fuel reformation cylinder.
A control method for an internal combustion engine including a fuel reformation cylinder and an output cylinder to which reformed fuel generated in the fuel reforming cylinder is supplied, the output cylinder being configured to yield an engine power by combusting the reformed fuel, wherein:
- the method adjusts a reaction gas temperature in the fuel reformation cylinder according to an equivalence ratio in the fuel reformation cylinder so that the equivalence ratio and the reaction gas temperature in the fuel reformation cylinder at a time of fuel reformation are in a reforming reaction possible range but outside a soot generation range, the soot generation range being defined by the equivalence ratio and the reaction gas temperature in the fuel reformation cylinder.
Dependencies are inferred from the claim text.