Minuteman's Emission Solutions

• EGR
• SCR

EGR || International^® Trucks

• EGR - MaxxForce In-cylinder with Advanced EGR

  • Fuel economy
  • EPA compliant
  • Lower operating costs
  • No urea required
  • No payload penalty
  • No new training
  • No impact on TEMs

SCR || Ford^® Commerical Trucks

• F450 & F550:  Ford 6.7-liter Power Stroke V-8 turbocharged diesel SCR Solution

The aftertreatment system works like this:

Step One: Cleaning and Heating – The first step in cleaning the diesel exhaust occurs when the exhaust stream enters the Diesel Oxidation Catalyst (DOC). The role of the DOC is twofold. First, it converts and oxidizes hydrocarbons into water and carbon dioxide. This conversion happens at about 250 degrees Celsius.

Second, the DOC is used to provide and promote heat, using specific engine management strategies, into the exhaust system. Through appropriate thermal management, this heat increases the conversion efficiency of the downstream subsystems in reducing emissions.

Step Two: Knocking Out the NOx – The next step in the process is what's known as Selective Catalytic Reduction (SCR). In this process, the NOx in the exhaust stream is converted into water and inert nitrogen, which is present in the atmosphere and harmless. Before the exhaust gas enters the SCR chamber, it is dosed with DEF, an aqueous solution that is approximately 67.5 percent water and 32.5 percent pure urea.

When heated, the DEF splits into ammonia and carbon dioxide. These molecules are atomized and vaporized, then enter a mixer that resembles a corkscrew. This twist mixer evenly distributes the ammonia within the exhaust flow. The ammonia enters the SCR module, which contains a catalyzed substrate, and through chemical reactions combines and converts the NOx and ammonia into the harmless inert nitrogen and water. Dosing occurs between 200 and 500 degrees Celsius.

Step Three: Scrubbing Away the Soot – The final part of the cleansing system for the diesel exhaust gas involves the Diesel Particulate Filter (DPF). The DPF traps any remaining soot, which is then periodically burned away, known as regenerating, when sensors detect the trap is full. The regeneration process sees temperatures in excess of 600 degrees Celsius to burn away soot.

This industry-proven technology ensures that the new 6.7-liter diesel is the cleanest Power Stroke ever, as well as the most fuel-efficient.

"Having this diesel designed in-house at Ford meant we were able to work on optimizations and refinements right from the start," said Tim Ogilvie, vehicle energy supervisor. "We're able to deliver to customers a more refined, more fuel-efficient Super Duty, with class-leading torque and horsepower and the class-leading capability they demand."

Read More (click here)

• F650 & F750: Cummins^® SCR Solution

Cummins solution for 2010 consists of a highly capable base engine with cooled-EGR, along with the Cummins Aftertreatment System, which reduces oxides of nitrogen (NOx) and Particulate Matter (PM) to achieve near-zero emissions standards.

Read More (click here)