| 摘要 |
An internal combustion engine, wherein a hydrocarbon supply valve (15) and an exhaust gas purification catalyst (13) are disposed inside an engine exhaust gas passage. When an increase in the temperature of the exhaust gas purification catalyst (13) caused by hydrocarbons supplied from the hydrocarbon supply valve (15) is smaller than a predetermined increase amount, and a decrease in the pressure of fuel supplied to the hydrocarbon supply valve (15) when the hydrocarbons have been injected from the hydrocarbon supply valve (15) is larger than a predetermined decrease amount, the present invention determines that a blockage is occurring in a hydrocarbon injection channel (69) when the hydrocarbons have been injected from the hydrocarbon supply valve (15). |
