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The updated software gives Mack and Volvo truck owners more time to address DEF-related issues before the engine derates or the vehicle goes into reduced-speed inducement, following new EPA guidance.
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The engine maker will gradually introduce its new Model Year 2027 diesel engines while continuing to offer current models during the transition, citing the EPA's proposed emissions rule changes.
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The proposal doesn't change the tougher NOx standard, but it would revise key implementation requirements that manufacturers say have driven up costs and complicated fleet purchasing decisions.
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Updated diesel engine software gives truck operators more time to address emissions-system issues while staying compliant with EPA emissions standards.
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The changes reflect EPA guidance aimed at reducing downtime caused by emissions-system faults while maintaining compliance requirements.
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The Engine Technology Forum’s new online hub aims to provide fleets, policymakers, and equipment owners with fact-based information about selective catalytic reduction technology, diesel exhaust fluid and emissions compliance.
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Volvo says advances in combustion and aftertreatment helped its new EPA 2027 D13 engine avoid the fuel-economy penalties many once expected from tighter NOx emissions limits.
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New guidance allows engine makers to replace problematic DEF sensors with NOx-based systems, aiming to reduce unnecessary derates and downtime caused by failures in the sensors designed to monitor diesel exhaust fluid on trucks.
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A recent EPA reference mixed up NOx and nitrous oxide. It’s an easy mistake. Just not one you expect to see in emissions policy. Let’s look at the difference.
Read More →The Environmental Protection Agency is asking diesel engine makers to provide information about diesel exhaust fluid system failures as it considers changes to emissions regulations.
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