Exhaust emission control devices
Cummins develops industry-leading aftertreatment technology designed to meet our customers’ needs for performance and reliability while optimizing fuel efficiency and cost savings. Cummings Emissions Solutions (CES) helps customers worldwide to meet the emission standards for today, tomorrow, and beyond with innovative, flexible, and integrated technology for light, medium, heavy-duty, and high-horsepower commercial off-highway markets.
On-highway aftertreatment systems are used to reduce or control the emissions of pollutants from internal combustion engines. These systems are typically employed in vehicles that operate on highways, such as cars, trucks, and buses. The goal is to comply with increasingly stringent emission standards and regulations set by environmental authorities to minimize the impact of vehicle emissions on air quality and public health.
Key components of on-highway aftertreatment systems
Diesel Particulate Filters (DPF)
DPFs are designed to capture and remove particulate matter (soot) from the exhaust gases of diesel engines. They work by trapping the particulates and periodically regenerating (burning off) them to prevent clogging.
Diesel Oxidation Catalysts
These catalysts facilitate the oxidation of pollutants like carbon monoxide and unburned hydrocarbons into less harmful substances.
Selective Catalytic Reduction (SCR)
SCR reduces nitrogen oxide (NOx) emissions by injecting a urea-based solution into the exhaust stream, where it reacts with NOx over a catalyst to form harmless nitrogen and water vapor.
Explore the latest EPA 2027 Twin Module Aftertreatment System
Explore the latest innovations in aftertreatment systems for on-highway applications.
Other key components
Combination systems
Natural gas and hydrogen engine aftertreatment systems
Diesel exhaust fluid (DEF) dosing
Thermal management technologies
Emission regulations supported
The emission regulations for vehicles and other equipment are designed to limit the emissions of pollutants. Compliance involves the use of advanced technologies to meet emission limits.
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