The Cattrap is a passively regenerating diesel particulate filter designed by Engine Control Systems specifically for mining and other heavy industrial applications. The Cattrap's advanced base metal soot ignition catalyst system eliminates diesel particulate emissions in excess of 85% while reducing toxic NO2 emissions. Listed on the United States Mine Safety Health Administration (MSHA) Table 2 List of Diesel Particulate Matter Control Technologies, the ECS Cattrap can be employed in mining environments, while most other DPFs don't provide a diesel retrofit solution suitable for mining.

How does the Cattrap work? A cordierite filter substrate is formed in a honeycomb design; alternating inlet cells are open on one end and plugged at the outlet end. As the exhaust flow enters the open inlet cells, it is forced to pass through the micro-porous walls to the outlet cells, filtering the diesel particulate from the exhaust.

The filter substrate is coated with a proprietary catalytic layer to reduce soot combustion temperatures to a level within the normal temperature range. The Cattrap displays regeneration balance points between 380°C and 425°C, varying with both vehicle engine and application. Continuous passive filter regeneration occurs during a vehicle duty cycle when the exhaust temperatures are above 400°C for more than 25% of the time.