| 摘要 |
This invention aims to perform the reforming control under a suitable temperature depending on a property of the fuel and improve the efficiency of the reforming control and the exhaust emission. A fuel reforming catalyst 28 is installed in an internal combustion engine 10, the catalyst 28 generating a combustible gas from a reforming fuel by using the heat of the exhaust gas. In the reforming control, the combustible gas generated by the actoin of the fuel reforming catalyst 28 is refluxed into the intake system. ECU 50 varies the lower limit temperature "To" of the reforming control depending on a mixture ratio of a gasoline and an ethanol in the reforming fuel. If the temperature "T" of the fuel reforming catalyst 28 is lower than the lower limit temperature "To", ECU 50 suspends the injection of the reforming fuel. Therefore, it can enlarge the temperature range to perform the reforming control as much as possible, and always perform the reforming control under the suitable temperature condition. |
