Engineered to support the 2027 X10 and the 2027 X15 diesel engines, the twin module aftertreatment is designed for a wide range of vehicle chassis configurations with minimized integration complexity. Its compact, dual-canister design maximizes packaging flexibility, with optimal space claim for the system. Powered by a 48-volt belt-driven alternator, the Twin Module enables Cummins Emission Solutions (CES’s) proprietary electric heating technology, providing precise thermal management and faster light-off for improved emissions control during cold-start and low-load conditions.
Product availability
North America
Product category
On-highway diesel aftertreatment systems
- Rugged and refined design
- Enhanced catalyst, sensor, and packaging design extends useful life by up to 50%
- Advanced catalyst formulation improves conversion efficiency with reduced Platinum Group Metal (PGM) content
- Innovative packaging
- Separate, configurable Diesel Particulate Filter (DPF) and Selective Catalytic Reduction (SCR) assemblies provide unmatched installation flexibility
- Twin SCR configuration minimizes back pressure and reduces thermal losses
- Electric heating system
- Integrated electric heating includes two (2) 5 kW heater modules with power distribution for effective NOx conversion during startup and low-load conditions
- Scalable design meets increased heat demands without expanding system footprint
- Balance of new and proven solutions
- Electric heating accelerates catalyst light-off, enhancing emissions control during cold starts and low temperature operations
- Leverages proven Diesel Oxidation Catalyst (DOC)-DPF-SCR architecture within a new platform to meet stringent emissions and GHG regulations
- Delivers optimal performance for EPA27, balancing reduced NOx limits, GHG targets, extended useful life, and packaging constraints
- Installation flexibility by design
- Supports a wide range of vehicle chassis configurations including under-step and in-rail layouts for on-highway commercial vehicles
- DPF assembly
- DPF meets more stringent PM requirements with same catalyst volumes and same service intervals
- Body mixer integration improves configuration flexibility and Diesel Exhaust Fluid DEF mixing
- Reformulated catalyst wash coat technology reduces PGM costs
- SCR assembly
- Parallel flow design minimizes overall length and backpressure
- Updated catalyst technology improves N₂O conversion and enhances low-temperature performance
- Electric heating system
- Two (2) 5 kW heater modules support effective NOx conversion during startup and low-load operations
- V-band connection between heater and catalyst modules simplifies maintenance and improves serviceability
Cummins’ electric heating system delivers exceptional value to customers as emissions regulations evolve. It ensures consistent and reliable temperature control across all operating conditions to maintain optimal aftertreatment temperatures. By supplementing engine heat with electric energy, the system reduces reliance on diesel fuel for thermal management.
- Emissions compliance
- Accelerates aftertreatment warm-up at startup, without additional DEF dosing
- Enhances NOx conversion during low-load, low-temperature operation—common in real-world duty cycles
- Maximized engine efficiency
- Supports on-demand thermal management by enabling precise application of electric heat when and where needed
- Allows for engine performance optimization without compromising aftertreatment temperature control
- Uptime
- Engineered to withstand the harsh conditions of commercial vehicle applications
- Designed for easy access and serviceability to reduce maintenance downtime
- Builds on the reliable Single Module architecture of DOC-DPF-SCR catalyst with single DEF dosing
- Simplified vehicle integration
- Enables a more compact system by replacing required additional catalyst volume with electric heat
- Eliminates the need for a hydrocarbon doser and associated hardware needed with a dual DEF dosing architecture
- Scalable design delivers increased heating capacity (kW) without expanding system packaging requirements
A deeper dive into the EPA 2027 aftertreatment system
