Portable emissions measurement system (PEMS) is the industry standard for emissions testing. It measures CO₂, CO, NO, O₂ and HC (optional). It is typically run in parallel with MVT Solutions’ fuel economy test and is designed for technologies that affect engine, fuel and aftertreatment systems.

These tests identify actual changes in engine characteristics such as torque, engine load, EGR flow as measured by the vehicle’s OEM data system. They also measure aftertreatment (a.k.a. emissions system) behavior with NOx exiting the engine and tailpipe, soot load, ash load and temperatures within the system. The test compares multiple vehicles and accounts for ambient variables with a variety of data collected during the test. These tests provide insight into how the technology is affecting engine behavior and emissions rather than the emissions alone.

Just like our fuel economy testing, our emissions testing provides highly accurate data. We can provide fuel economy testing with emissions testing and/or PEMS data. OEM engine and emissions data combined with fuel economy test data provides great insight into how the engine and aftertreatment systems are reacting to an engine or fuel-related technology. This allows for a better understanding and proof of the efficacy of the tested technology.