WABCO says regenerative braking eTrailer can save GCC fleet operators 20% on fuel
WABCO presented the prototype of its first electric trailer at IAA Commercial Vehicle 2018 in Hanover, Germany, an eTrailer system that it says can save up to 20% on fuel costs on short-haul routes.
Dr. Christian Brenneke, chief technology officer at WABCO.
“WABCO’s eTrailer prototype uses an intelligent electric motor control to recuperate electric energy during braking, which can then be reutilized to power the vehicle’s traction or to operate on-board electric auxiliaries,” says Dr. Christian Brenneke, chief technology officer at WABCO.
The main advantage of this solution towards existing concepts is the integration of the eDrive capabilities into the trailer and truck brake and stability control system.
To achieve a maximum of energy recuperation with regenerative braking, it is mandatory to minimize the use of friction brakes of the overall vehicle (truck and trailer) and the endurance brakes of the truck.
Commercial fleet operators that connect eTrailer to a truck equipped with WABCO’s intelligent braking and stability control systems will further enhance the operating efficiency of the truck-trailer combination.
“WABCO estimates the eTrailer to deliver fuel savings up to 20 percent on short haul routes and up to 10 percent for long hauls in a truck-trailer combination,” Brenneke adds.
The eTrailer is equipped with a 300 kW (peak) induction machine connected without a clutch directly via cardan shaft to the last trailer axle.
The recuperated electric energy is stored in a 28 kWh battery. The storage combines a huge charge power with a relatively small energy store capacity, a typical design approach for hybrid vehicles and electric traction purposes.