Exhaust purification device of internal combustion engine
X X X X X In an internal combustion engine, an NOselective reducing catalyst is arranged in an engine exhaust passage. Aqueous urea is fed from an aqueous urea feed valve into the NOselective reducing catalyst to selectively reduce the NOcontained in the exhaust gas with the ammonia generated from t...
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| Format | Patent |
| Language | English |
| Published |
28.08.2012
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| Online Access | Get full text |
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| Summary: | X X X X X In an internal combustion engine, an NOselective reducing catalyst is arranged in an engine exhaust passage. Aqueous urea is fed from an aqueous urea feed valve into the NOselective reducing catalyst to selectively reduce the NOcontained in the exhaust gas with the ammonia generated from the aqueous urea. The moisture contained in the exhaust gas is recovered and stored in a water tank. It is provided with a high concentration aqueous urea tank storing high concentration aqueous urea having a higher urea concentration than the urea concentration of the aqueous urea fed to the NOselective reducing catalyst, and the high concentration aqueous urea is diluted with the recovered moisture thereby generating aqueous urea fed to the NOselective reducing catalyst. |
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