Allen Schaeffer

Allen Schaeffer is an OEM Off-Highway Editorial Advisory Board member and Executive Director of Diesel Technology Forum.

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A Pivot from Clean Air to Efficiency

The Diesel Technology Forum (DTF) has studied and analyzed the perception and impacts of the VW situation on the diesel industry at large.

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A race to the starting line

Part one of the emissions reduction strategy may be completed with system implementation underway, but the reduction expectations of the government are far from over.

The EPA's current Ozone Regulations: Green indicates the county meets standards, red does not meet standards, and gray areas are not currently monitored.

Cleaner than clean

As air monitoring technology becomes more portable and accessible, and clean air requirements continue to get stricter, the industry of clean air continues to be top of mind to equipment manufacturers and contractors alike.

The John Deere 644K Hybrid wheel loader uses a diesel engine running at steady state to turn an electric generator.

Clean Diesel 2.0

A brief look into the world of diesel power in both on- and off-highway vehicle applications, emissions reduction tactics and the future of clean diesel technology solutions.

U.S. EPA's off-road diesel emissions limits are phased in using the eight horsepower groups shown across the top line of this table. Under-75-hp engines had to meet Tier 4 final limits as of the first of 2013, and all engines must comply with Tier 4 final by 2015.

Clean Diesel Emissions and Equipment Update: Tier 4 Standards, Update and Future Considerations

The advances in engine combustion, fuel injection, turbocharging and engine control systems and new emissions control options using reformulated and low-sulfur diesel fuels were the right formula.