The new optional engine emissions system (EES) from Carrier Transicold, capable of reducing diesel particulate mass from trailer refrigeration unit exhaust by more than 98%, has received conditional verification from the California Air Resources Board (CARB).
It’s said to be the first OEM-developed CARB level-3-plus-verified diesel emissions control (VDEC) device for trailer refrigeration units that can be included with initial purchase or added later for users who don’t need it initially. A level 3 plus device reduces particulate emissions in accordance with CARB’s ultra-low emissions requirement for transport refrigeration units, also known as ULETRU, while also reducing nitrogen oxides.
Carrier’s latest reefer engines are already certified for ‘evergreen’ compliance with the 2013 EPA Tier 4 standard for engines less than 25 hp, allowing for indefinite use throughout North America, except in California. In California, CARB uniquely requires that a VDEC strategy be applied to units in this horsepower class for use in the state beyond the initial seven years.
The EES is conditionally verified for use with Carrier Transicold’s new Tier 4-compliant designs, which include the X4 Series single-temperature models 7500 and 7300, and the hybrid Vector 8500 single-temperature and Vector 8600MT multi-temperature units. In the current phase of the verification process, these models can be factory-equipped with the EES and it can be installed on previously purchased units with up to 3000 hours of engine operation.
In accordance with CARB protocols, testing on aged trailer unit engines will continue into 2014 to verify EES performance on engines with far more hours of service, so as to eliminate the 3000-hour provision, Carrier explains.