ECM’s RDE systems combine emissions gas measurements with GPS, vehicle data stream, and ambient measurements into a portable package suitable for use on vehicles of all sizes. RDE systems are available in two forms: miniPEMS™, a small package for use on scooters, motorcycles, ATVs, and snowmobiles, and miniPEMS 2 for larger vehicles.
Operation of miniPEMS is simple: mount the emissions sensors in the exhaust, the GPS on the roof (for miniPEMS 2), connect to the vehicle’s data stream port, and every time the on/off switch is toggled, data is recorded. After the testing is over, data is then uploaded to a PC where it appears in an Excel™ file. miniPEMS is powered by one or four internal batteries but can alternatively be powered by the vehicle itself or an available AC/DC power supply.
miniPEMS systems are built from ECM’s measurement modules. Base miniPEMS systems have a NOxCANt module (NOx, O2, Lambda), a 4tcCAN module (four K-type thermocouple measurement channels), a WAAS-enabled GPS, and a data logger. From the base system you optionally add functionality as needed with the following options:
miniPEMS holds up to four modules. miniPEMS 2 holds up to seven.
Using miniPEMS as a development tool, ECM has created and demonstrated a low-cost NOx and PM/PN compliance tool called EZ-PEMS. This device was demonstrated at the 2022 PEMS Conference in UC Riverside and is shown in this presentation and this video. EZ-PEMS is available to government agencies researching simplified “field test” compliance devices.