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Diesel power provides two-thirds of the energy for machinery on America's farms. Diesel also powers most of the heavy equipment used in construction.

New Clean Diesel Technology for Farm and Construction Equipment:Tier 4 is Here

A new generation of technology of new clean diesel technologies, known as the Tier 4 Final standards, has near zero emissions and are the cleanest diesel engines ever produced. Meeting these standards is made possible by the clean diesel system which combines ultra-low sulfur diesel fuel, advanced clean burning diesel engines, and emissions control and exhaust aftertreatment systems as an integrated system. Tier 4 is making its debut in a wide range of equipment used in off-road applications like construction, forestry and farming.

Clean diesel technology is now the standard for all new technology, everything from new passenger cars and pick-up trucks to highway commercial trucks. The new generation of technology is another iteration of the clean diesel system: cleaner, ultra-low sulfur diesel fuels; advanced engine controls and combustion improvements coupled with emissions control technology (particulate traps and filters). Now, this new generation of clean diesel technology for off-road engines and equipment known as Tier 4 is making its way onto the construction and industrial jobsites and farm fields around the country. The equipment used in farming, mining and construction is uniquely qualified to do demanding work. No other power source shares diesel's reliability, durability and fuel-efficiency for these off-road applications.

Diesel engines power more than two-thirds of all farm equipment in the United States. Farm tractors, combines, irrigation pumps and other equipment are the workhorses in an industry vital to our national economy and quality of life. In addition, diesel engines are uniquely capable of doing demanding construction work - from lifting steel beams and digging foundations to drilling wells and trenches. Plus, America's mining sector relies heavily on diesel power to harness natural resources such as precious metals, iron, oil, gas and coal.

Implementation of the Tier 4 standards will come in two phases. The first phase begin in January 2011 and will virtually eliminate particulate matter emissions, while the second phase beginning in 2014 will similarly bring the nitrogen oxide emissions to near zero levels. In each case, the standards will be phased in based on engine size. A detailed chart of these emissions levels and their introduction dates is available here.

Leaders in clean diesel technology are using a range of approaches to meet these near zero emissions levels.


Tier 4 - Committed to Customer Success


Meeting the Tier 4 Challenge

 John Deere

Tier 4 Technologies -- Right Technology. Right Now.

Detroit Diesel

Finding the best path to Tier 4i (interim) nonroad emissions compliance: The answer depends on the application

New Tier 4 Clean Diesel Technology for Off-Road Equipment -- FAQs

Download - "Clean Diesel Technology for Off-Road Engines and Equipment: Tier 4 and More"

Five leading off-road equipment industry associations published a "frequently asked questions" (FAQ) report about Tier 4 technology - the next generation of clean diesel emissions standards established by the U.S. Environmental Protection Agency (EPA) under the federal Clean Air Act. These standards apply to new diesel engines used in off-road equipment beginning in 2011.

The associations that collaborated with the Diesel Technology Forum on the Tier 4 report are:
Associated Equipment Distributors (AED)
Association of Equipment Manufacturers (AEM)
American Rental Association (ARA)
Farm Equipment Manufacturers Association (FEMA)
North America Equipment Dealers Association (NAEDA)Chart Tractor

Ag Tractors, Scrapers, and Wheel Loaders
The Workhorse of Farms and Ranches

Diesel-powered equipment is a major part of the supply chain that moves crops from the farm to the dinner table. Nearly 90 percent of all agricultural trucks in the U.S. are diesel powered, and most all Green TractorAmerican railroad cars and marine vessels are powered by diesel.

The use of diesel generators and pumps for agricultural operations is critical in remote locations. This permits ranchers to perform critical tasks, and saves time and effort by increasing productivity.
Building America's Future

Today, roughly 850,000 diesel-powered vehicles nationwide are in use bringing supplies, materials and workers to and from U.S. construction sites. Earthmovers, bulldozers, bucket loaders, backhoes, cranes, pavers, excavators and motorgraders are all essential to building and expanding our economic infrastructure. For most of these machines, there is simply no substitute for diesel power.


The U.S. construction industry employs nearly six million people and contributes some $850 billion annually to the economy. This is due in no small part to the power and efficiency of diesel. Read about diesel's impact on the American economy.

Harnessing Our Natural ResourcesGreen Dump Truck

Mining is critical to extracting and developing the raw materials that produce our nation's energy.

Overall, mining utilizes nearly $7 billion worth of diesel-powered equipment. Diesel-powered shovels and drills excavate and load natural resources into enormous mining trucks or onto conveyer belts that also operate on diesel fuel.

Bulldozers and Mining TrucksBackhoes

Clean Diesel Retrofits

Because diesel engines can last for decades, there are cleaner diesel technologies on the market now that can improve both the performance and the clean air benefits of off-road diesels.

Modernizing and upgrading off-road vehicles and equipment with cleaner engines, cleaner fuels and retrofit technology will significantly improve our nation's air quality. Farmers, mining companies and construction projects can see tremendous improvements with newer, more powerful and more efficient equipment. And communities nationwide are benefiting from improved air quality.

In August 2005, the Diesel Emissions Reduction Act (DERA) was signed into law as part of the Energy Policy Act of 2005. DERA will provide federal funding to retrofit programs nationwide, including off-road vehicles for farming, mining and construction applications.

Other methods of reducing emissions include the use of ultra-low sulfur diesel (ULSD), as well as proper preventive maintenance programs such as training equipment operators in anti-idling practices and educating fleet managers about engine replacement.



DTF Launches Learning Series
August 24, 2015 // Mass Transit

Beginning Sept. 2, the Diesel Technology Forum will host a series of online web-based sessions on a range of topics including personal transportation choices, goods movement, rail and water transportation, emergency preparedness, agricultural productivity. . .  read more

Back to work building better diesels
August 18, 2015 // Country Guide

“Generally speaking, in the U.S. we’ve spent the last decade in the off-road space focusing on virtually eliminating emissions of nitrous oxides and particulates,” says Allen Schaeffer, executive director of the U.S.-based organization Diesel Technology F. . .  read more

Commentary: Clean diesel in the USA – part of the air pollution solution?
August 13, 2015 // Air Quality News (United Kingdom)

Reductions in NOx and particulate emissions from diesel vehicles in the USA shows how the technology can be part of the solution to air quality problems, writes Alan Schaeffer, executive director of the Diesel Technology Forum.  read more

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A growing market for diesel cars, trucks, engines, equipment and fuels is critical to your company's success. A positive media environment and favorable public opinion can reinforce the value of a technology and enable winning public policies. Companies join the Forum because they want to aggressively promote diesel engines, fuels and technology as valuable product and technology solutions for addressing key national priorities.

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