Effects of B20 fuel and catalyst entrance section length on the performance of urea SCR in a light-duty diesel engine.

摘要

The current study focused on the effects B20 fuel (20% soybean-based biodiesel) and SCR entrance shapes on a light-duty, high-speed, 2.8L common-rail 4-cylinder diesel engine, at different exhaust temperatures. The results indicate that B20 has less deNOX efficiency at low temperature than ULSD, and that N2O emission need to be characterized as well as NH 3 slip. If a mixer and enough mixing length are both used, longer SCR entrance section does not improve the deNOX efficiency significantly under the speed ranges tested.