Diesel exhaust fluid is a non-toxic liquid mixture sprayed into the exhaust stream of diesel engines to chemically reduce nitrogen oxide air pollutants produced during combustion. Like adding a cleaning agent to a dirty pipe, it lets modern diesel vehicles meet emissions rules; for investors it affects operating costs, aftermarket demand, regulatory compliance risks, and the market for fuel, fleet services and emission-control equipment.
selective catalytic reductiontechnical
Selective catalytic reduction is an emissions control system fitted to diesel engines that injects a harmless liquid reagent and passes exhaust through a catalyst to convert nitrogen oxides into nitrogen and water. Think of it as a chemical “cleaning step” added to an engine’s exhaust pipe. Investors care because regulations and enforcement drive demand for these systems and their consumables, affect manufacturing costs, create aftermarket service needs, and can influence fines or compliance expenditures for vehicle makers and fleet operators.
u.s. environmental protection agencyregulatory
The U.S. Environmental Protection Agency (EPA) is the federal agency that creates and enforces rules to protect air, water and land from pollution. Investors watch its actions because those rules can raise or lower costs, limit or enable products and operations, and create legal or cleanup liabilities for companies—like a referee whose calls can change a team’s strategy and prospects in the market.
deratetechnical
A derate is a reduction in how the market values a company, usually shown by a falling valuation multiple (like price-to-earnings) or by analysts lowering earnings forecasts and target prices. It matters to investors because it can shrink a stock’s market price even if underlying sales or profits are steady; think of it like a haircut to a car’s appraised value when buyers become less willing to pay the same premium.
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COLUMBUS, Ind.--(BUSINESS WIRE)-- Cummins Inc. has begun updating certain engine calibrations to give operators more time to complete needed repairs and help minimize unnecessary downtime related to diesel exhaust fluid (DEF) inducements. The updates continue to support emissions compliance and the performance of selective catalytic reduction technology, with a focus on the people and businesses that depend on this equipment to do their jobs every day.
Following updated guidance from the U.S. Environmental Protection Agency (EPA), the revised calibrations increase the amount of time before certain DEF-related inducements occur and increase final inducement speeds in certain circumstances. Emissions compliance remains mandatory.
“We appreciate EPA’s engagement with industry stakeholders and view the revised guidance as an important step toward addressing customer concerns in a practical, compliance-focused way,” said Brett Merritt, vice president and president, Engine Business. “Cummins has acted to support reliable implementation of these updates, help customers and operators reduce unnecessary downtime, and continue to meet emissions requirements.”
For heavy-duty truck and tractor engines, the updates extend the time to initial and subsequent derate events for certain tampering and DEF quality conditions and increase final derate speed from 5 mph to 25 mph.For eligible motorcoach applications, the updates provide additional flexibility, including more time before initial inducement, removal of the secondary derate step in certain conditions and an increase in final derate speed from 5 mph to 50 mph.
DEF remains required for the emissions system to operate properly, and DEF-level inducement steps based on remaining tank level remain in place. These updates are intended to provide additional operational flexibility while maintaining emissions system requirements.
Cummins has already begun offering revised calibrations for over 1.5 million engines in medium and heavy-duty trucks, including certain truck applications dating back to model year 2017 and certain motorcoach applications dating back to model year 2018, with timing varying by engine platform and model year.
Customers may contact their local Cummins distributor or dealer to schedule available updates.
