| Patent application number | Description | Published |
|---|
| 20100058741 | EXHAUST PURIFICATION DEVICE OF INTERNAL COMBUSTION ENGINE - In an internal combustion engine, an NO | 03-11-2010 |
| 20110047993 | EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE - In an exhaust purification system of an internal combustion, comprising a NO | 03-03-2011 |
| 20110056188 | EXHAUST PURIFICATION APPARATUS FOR INTERNAL COMBUSTION ENGINE - The present invention provides an exhaust purification apparatus for an internal combustion engine which enables a decrease in NOx purification rate and possible ammonia slip to be inhibited. The apparatus includes an NOx catalyst, a urea aqueous solution addition valve serving as reducing agent adding means, and NOx sensors provided an inlet and an outlet of the NOx catalyst, respectively. When the bed temperature of the NOx catalyst is in a predetermined high-temperature region in which the amount of ammonia converted into NOx increases relatively and an NOx purification rate decreases relatively, the apparatus uses outputs from the NOx sensors to perform correction such that the actual addition amount of the urea aqueous solution addition valve reaches a target addition amount. | 03-10-2011 |
| 20110083429 | CATALYST PASSING COMPONENT DETERMINING APPARATUS AND EXHAUST PURIFICATION APPARATUS FOR INTERNAL COMBUSTION ENGINE - The present invention comprises a selective reduction type NOx catalyst located in an exhaust passage and being capable of purifying NOx with ammonia, an oxidation catalyst located downstream of the selective reduction type NOx catalyst, an upstream sensor located between the selective reduction type NOx catalyst and the oxidation catalyst and having ability to detect both ammonia and NOx, a downstream sensor located downstream of the oxidation catalyst and having ability to detect both ammonia and NOx, and determining means for determining a component passing through the selective reduction type NOx catalyst, based upon a relation between output of the upstream sensor and output of the downstream sensor. | 04-14-2011 |
