Carrier Transicold has introduced four new trailer refrigeration units (TRUs) it says offer double-digit fuel efficiency improvements and lifetime compliance with California Air Resource Board (CARB) requirements.

The new systems include two single-temperature units – the Vector 8700 and X 7700 – and two multi-temperature units, the Vector 8800MT and Vector 8811MT. All reduce particulate emissions by 96% compared to current offerings and, depending on the application, improve fuel efficiency from 5-20%, according to the company.

A 24-hp Kubota engine offers clean engine technologies such as common rail fuel injection, an enhanced fuel filtration system and diesel oxidation catalyst that reduces hydrocarbon and NOx emissions. They comply with CARB’s stricter rules for TRUs that take effect May 31, 2023 and will provide lifetime regulatory compliance, Carrier says.

And fuel economy is improved thanks to the new common rail fuel injection system and introduction of a third engine speed dubbed “eco speed,” which automatically drops engine rpm below low speed when conditions allow.