SCRT + TM

Highly efficient aftertreatment system with
active thermal management strategies

Many commercial vehicle applications, mobile machines and stationary applications
have load profiles that, owing to the low exhaust-gas temperatures,
necessitate the use of active thermal management in order to guarantee full
functional reliability of the exhaust aftertreatment system. This is important
for regeneration of the particulate filter and the DeNOx system, which need a
certain temperature for proper functionality, especially in the light of Euro VI
or stage V emission standards and their emission requirements over life time.
Established methods include burner-based systems, systems for hydrocarbon
(HC, i.e. fuel) dosing downstream of the engine, downstream HC conversion in
a catalytic converter or a combination of the latter two. However, the high requirements
of today’s and future emission standards can only be partially met
by engine based thermal management. HJS adapts this concept as a self-sufficient
system architecture to exhaust aftertreatment. The HJS exhaust gas system
with active thermal management (SCRT®TM) uses two interlinked
actuators to ensure that the systems can be operated even with low loads
under all environmental conditions. This ensures best possible reduction performance
without influencing the engine. Our latest technical approach also
includes an electrically heated oxidation catalyst.
Maximum efficiency and robustness – HJS systems make sure that even the
most stringent emission standards cause no risk of non-compliance or machine
downtime!