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!