Off-highway tail pipe emissions have been regulated since 1997, targeting raw emission species like NOx, HC, PM and CO. Multiple amendments have been introduced, from Stage I till current regulatory norm of Stage V [1
st January 2017]. With Stage V, we already have achieved >95% NOx reduction [engine to tailpipe]. The next regulatory stage [beyond Stage V], is expected to have conversion efficiency of >90% from the Stage V limits of 0.4 g/kWh NOx tailpipe. (EUROPEAN COMMISSION,
2023)
With Stage V and Tier4f experience, the off-highway fraternity has developed the expertise to optimize the powertrain from engine till tailpipe to achieve stringent emission targets. While the technologies are available to meet ultra-Low NOx targets of future, identifying the right combination and to have a system approach is critical to keep the end-product effective, considering performance, robustness, and cost competitiveness.
Donaldson, as an aftertreatment system integrator, focusses on effective thermal management & efficient mixing technology to support meeting the ultra-Low NOx targets of future. This paper explains some of our validated concepts from child part level to support effective thermal management across EAT system. The primary focus is thermal retention, avoid heat losses, address cold start, and effectively support quick light off, of the oxidation catalyst & the SCR system. We will brief about the thermal CAE indications, and bench trials conducted on different technologies and their compounded benefits, supporting early SCR light off. These concepts are part of Donaldson’s “Readiness for Beyond Stage V” demonstrator work package, concentrated to add value to our customers and to support them in identifying the benefits of available technologies in market to achieve the ultra-Low NOx targets.
