New EPA Proposal Could Roll Back Some DEF-System Requirements For Diesel Engines

Just a short time after reducing regulations regarding fuel and exhaust systems around diesel engines, the EPA seems to be ...
Truckinginfo

Engine Technology Forum Launches SCR, DEF Resource Center Amid Emissions Debate

The Engine Technology Forum has launched a new online resource center dedicated to selective catalytic reduction (SCR) systems and diesel exhaust fluid (DEF). The advocacy group said the new resource ...
Overdrive

Legislator proposes 'liberation' for diesels from emissions controls with bill to relax penalties for 'deletes'

Decades of EPA rules for diesel engine emissions are in the crosshairs of new legislation in the Senate. Growing paid truck parking network hits a milestone. Wyoming Sen. Cynthia Lummis (R-Wyoming) ...
Truckinginfo

EPA Wants to Know: Are DEF De-Rates Really Needed for Diesel Emissions Compliance?

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. The move is a ...
Hosted on MSN

SwRI demonstrates path for off-road diesel engines to meet CARB Tier 5 emissions rules

Southwest Research Institute (SwRI) announced on June 10, 2026, that it has successfully demonstrated a diesel engine system that allows off-road vehicles to meet proposed California Air Resources ...
Transport Topics

Reducing Emissions Without Sacrificing Diesel Efficiency

For our industry, the year 2027 means meeting lower NOx standards while using less fuel. Under old diesel design rules, this would be quite problematic because NOx forms at the high cylinder ...