| Autor: |
Broyer, Valery, Schreurs, Bart |
| Zdroj: |
Research Disclosure; Aug2004, Issue 484, p1078-1083, 6p, 7 Diagrams, 2 Graphs |
| Abstrakt: |
The emissions from a diesel engine include gases and particulate matter. Gaseous emissions typically include gaseous hydrocarbons and oxides of carbon, sulfur and nitrogen. Particulate matter typically includes combustible particles such as carbon soot and non-combustible materials such as metals from engine wear and ash from lubricating oils. As a particulate filter collects soot, the passage of exhaust gas through the filter is progressively blocked and the backpressure in the filter increases. In order to prevent the filter from becoming completely blocked by soot deposits, it is necessary to periodically clean the filter of its particulate matter, in a process known as regeneration. In order to trigger the regeneration process, it is necessary to determine the mass of the soot deposited in the particulate filter. One method of estimating the deposited soot mass is to measure the pressure drop across the filter. However, the present invention provides a method of estimating the mass of soot deposited in a particulate filter without the requirement for a differential pressure sensor. The invention estimates the mass of soot deposited in a particulate filter by means of two models namely an engine out soot model and a soot oxidation model. Both of these models will be described in more detail. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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