2019 Ram 1500 with 3.6-liter eTorque powertrain
The eTorque mild-hybrid system replaces the traditional alternator on the engine with a belt-driven motor generator unit that performs several functions. The motor generator unit works with a 48-volt battery pack to enable improved fuel efficiency, drivability, performance and value with quick, seamless stop-start functions and energy recovery with brake regeneration used to support increases in towing capacity and payload.
With the engine running, eTorque’s motor generator unit feeds 48-volt current to a 430 watt-hour lithium-ion nickel manganese cobalt (NMC)-graphite battery. The battery pack includes a 3-kilowatt DC-to-DC converter to maintain the battery’s state of charge and convert 48 volts to 12 volts to power the Ram 1500’s accessories and charge its conventional 12-volt lead-acid battery.
The Pentastar V-6 engine with eTorque retains a conventional 12-volt starter motor, used for cold starts and the first start of the day due to its greater efficiency in extreme temperatures.
eTorque delivers seamless and nearly unnoticeable engine restarts by sending up to 90 lb.-ft. of supplemental torque to the crankshaft during stop-start maneuvers. Torque to the wheels travels within 400 milliseconds, more than twice as fast as many starter-motor engine stop-start systems.
In addition to spinning the engine for restarts to help launch the vehicle, eTorque also recaptures energy during deceleration and braking to charge the battery pack. eTorque also enhances the driving experience by adding torque to the crankshaft during gear changes to minimize noise, vibration and harshness (NVH).
“The versatility of our workhorse Pentastar V-6 engine family is unquestioned, with more than 9 million produced; and this latest Wards milestone represents the sixth time the 3.6-liter engine has been recognized with three different iterations,” Bob Lee, Head of Engine Powertrain and Electrified Propulsion Systems Engineering, FCA-North America, said “With the new eTorque mild-hybrid system, receiving the Wards 10 Best recognition validates our mission to provide customers optimal ownership value without sacrificing performance.”