Allison's hybrid system paired with Cummins' diesel engine certified by California Air Resources Board  [ USA ]

Allison Transmission Holdings Inc. and Cummins Inc. announced that they have received certification from the California Air Resources Board (ARB) to sell the model year 2015 Allison H 40/50 EP hybrid propulsion system paired with the Cummins ISB6.7 and ISL9 diesel-electric hybrid engines for transit buses and coaches. Allison's H 40/50 EP hybrid propulsion system is used for both straight and a...