Development and commissioning of a small engine test cell

For the purposes of providing the Center for Alternative Fuels, Engines, and Emissions (CAFEE) of West Virginia University (WVU) with the ability to perform engine dynamometer and emissions testing on small engines in the range of 40 horsepower or less, a new test cell was built and commissioned within the CAFEE annex facility in the Morgantown Industrial Park in Westover, WV. The test cell was designed to be used with existing CAFEE emission testing equipment.;Test cell commissioning demonstrated the ability of the system to properly operate full steady state test cycles, as well as capture steady state continuous gaseous emissions data and gravimetric particulate matter data. During steady state tests, which followed the ISO-8178 test cycle, the dynamometer showed the capability of holding engine speed within 2% of the reference set point value, and within 1% on a mean basis. Similarly, setpoint reference torque loads between 10 and 60 ft-lbs, which were based on a full map of the test engine, the dynamometer was able to hold torque within 2% of the reference value, for each point and within 1% on a mean basis.;A series of steady state tests performed on a 4 cylinder Isuzu CP201 Transport Refrigeration Unit (TRU) diesel engine resulted in baseline engine out emissions data (g/bhp-hr) for HC, CO, CO2, NOx, and PM of 4.31, 2.71, 751.98, 7.33, and 0.591 respectively. Controlled emissions results, with an exhaust aftertreatment Diesel Particulate Filter (DPF) containing an internal catalyst layer, resulted in reduction in HC, CO, and PM of 81, 84, and 86% respectively. The reduction in PM of 86% by the DPF was within the requirements of the California Air Resources Board (CARB) Low Emission TRU (LETRU) Level 2 PM reduction requirement for Verified Diesel Emission Control Strategies (VDECS)