Abstract
Deposit mass and thickness was generally lowest at the outlet of the coolers due to a lower temperature gradient hence a lower thermophoretic velocity. Deposit mass and thickness was highest on the downstream side of the sine wave for all of the coolers. EGR Temperature - Low EGR temperature combined with High EGR rate produces the most deposit. - High EGR temperature removes most (all) HC on the metal surface which possibly reduces PM adherence. - High EGR temperature produces thermo-chemical effects that correlates with deposit mudcracking. - Metal surface comes into play with high EGR temperature. EGR Rate - High EGR rate is bad because it increases the total PM and HC flowing into the cooler. - However, high EGR rate may be beneficial when combined with high EGR temp by aiding in deposit removal at the inlet. Smoke- High smoke produces PM agglomerates. HC - High HC deposits have a dense HC layer on the metal and an HC gradient in the PM deposit. - In some cases, high HC may densify the deposit and produce mud-cracks though in a different way than high EGR temp.
| Original language | English |
|---|---|
| Title of host publication | Global Powertrain Congress 2011, GPC 2011 Troy, Held with IABC 2011 Troy - Proceedings |
| Pages | 387-407 |
| Number of pages | 21 |
| State | Published - 2011 |
| Event | Global Powertrain Congress 2011, GPC 2011 Troy, Held with IABC 2011 Troy - Troy, MI, United States Duration: Nov 9 2011 → Nov 10 2011 |
Publication series
| Name | Proceedings of Global Powertrain Congress |
|---|---|
| Volume | 65 |
| ISSN (Print) | 1543-9666 |
Conference
| Conference | Global Powertrain Congress 2011, GPC 2011 Troy, Held with IABC 2011 Troy |
|---|---|
| Country/Territory | United States |
| City | Troy, MI |
| Period | 11/9/11 → 11/10/11 |