Development of Efficient Urea-SCR Systems for EPA 2010-Compliant Medium Duty Diesel Vehicles

A study of the effect of post injection on combustion and emissions with premixing enhanced fueling strategies

“…Each of these devices require specific temperatures and exhaust gas composition for optimal performance. SCR and LNT systems typically require reactor temperatures in the range of 250-400°C for maximum NOx conversion efficiency [10][11][12]. Temperatures above 500°C may be periodically required by DPFs for regeneration purposes [13].…”

Effects of application of variable valve timing on the exhaust gas temperature improvement in a low-loaded diesel engine

“…Recently, those emission regulations have been increasingly strengthened. For instance, Environmental Protection Agency (EPA) state that automotive engines should not emit higher than 0.013 g/kWh PM and the amount of NO x emission cannot be more than 0.27 g/kWh [1]. Diesel engine producers search for advanced combustion techniques such as reactivity controlled compression ignition (RCCI), homogenous charge compression ignition (HCCI), partially premixed compression ignition (PPCI) [2][3][4][5];…”

Numerical model of variable valve timing distribution for a supercharged diesel engine

“…It emphasizes the significance of DEs in industrial and urban transportation due to their high fuel efficiency but highlights that the inefficient functioning of these engines leads to GHG emissions. Therefore, the environmental protection agency (EPA) set these emissions for the new fabricated engines under 0.013 g/kWh particulate matter (PM) [4]. That is why many scientists have worked to improve performances to lower GHG emissions, and the subject has been thoroughly investigated in the last two decades [5]- [8].…”