“Super Cell” Simulates Real-World Conditions

July 3rd, 2006

Southwest Research Institute has developed a “super cell” to evaluate the effects of altitude and other environmental conditions on performance and pollutant emissions of heavy-duty engines, with interactions of fuels, lubricants and catalysts. The Environmental Protection Agency has introduced not-to-exceed (NTE) emission limits that apply to in-use operation over a range of environmental conditions encountered by trucks and other engine applications.

Conditions within not-to-exceed compliance zones are readily available with the super cell, which applies various altitude conditions, in combination with a range of temperatures and humidity levels, to engines of 100–750 horsepower.

Although the super cell is designed to ensure NTE compliance, it also can be used to optimize engines for fuel economy and performance at conditions not easily achieved in the laboratory. Combining this capability with precise instrumentation and engine operation, SwRI helps manufacturers evaluate and optimize how their engines, fuels and lubricants will operate at high altitudes, such as those in Denver and Mexico City, as well as at lower altitudes. Devices that control emissions or improve performance can also be quantified.

The ability to evaluate engines at high and low altitudes using a consistent set of instruments, with the same engine setup and control, at the same location, also relieves concerns about lab-to-lab variability. The super cell uses a full-flow, constant volume sampling, gaseous emissions bench and particulate measurement system to provide emissions data compliant with current and 2007+ highway engine regulations, as well as current and future non-road engine regulations. The system can accommodate steady-state and transient engine operation at altitudes up to 12,000 feet above sea level, along with additional variations in temperature and humidity conditions to investigate emissions levels and engine performance for markets outside the NTE envelope.

For more information about the super cell, engine manufacturers, fuel and lubricant manufacturers, catalyst suppliers and regulatory agencies should contact Terry L. Ullman at (210) 522-2654 or terry.ullman@swri.org.

Entry Filed under: Test Labs