Short Answer
Overview
eTorque is a mild hybrid powertrain technology developed by Ram Trucks (a division of Stellantis, formerly Fiat Chrysler Automobiles). It integrates a 48-volt electrical system with a belt-alternator-starter (BAS) unit and a small lithium-ion battery pack. The system provides electric torque assist during acceleration, enables smooth start-stop engine shutoff at idle, and captures energy through regenerative braking. Unlike full hybrids or plug-in electric vehicles, eTorque cannot drive the wheels solely on electric power and does not require external charging. It was first introduced on the 2019 Ram 1500 pickup truck as an available option on both V6 and V8 engines.
History / Background
The development of eTorque occurred as automakers sought ways to improve fuel economy and reduce emissions while maintaining the capabilities expected from full-size pickup trucks. Ram Trucks announced the eTorque system in early 2018 as part of the redesigned 2019 Ram 1500. The system was designed to meet stricter Corporate Average Fuel Economy (CAFE) standards and to compete with other mild hybrid offerings in the truck segment, such as the Ram 1500’s domestic rivals. The eTorque system evolved from earlier mild hybrid concepts and was adapted from the 48-volt architecture used in some European passenger vehicles. Ram subsequently expanded availability of eTorque to other models, including the Ram 2500 and 3500 heavy-duty trucks.
Importance and Impact
eTorque has had a measurable impact on fuel efficiency and driving characteristics. According to Ram, the system can improve fuel economy by up to 2 miles per gallon in certain driving cycles compared to a non-hybrid V8 engine. The electric boost helps reduce turbo lag in V6 models and provides additional low-end torque for towing and hauling. The seamless start-stop function reduces engine noise and vibration during idling. In the context of the pickup truck market, where fuel consumption and emissions are significant concerns, eTorque represents a low-cost, practical way to reduce environmental impact without sacrificing payload or towing capacity. The system also supports engine-off coasting and extends the life of the conventional starter motor.
Why It Matters
For consumers, eTorque offers a tangible improvement in everyday driving efficiency and comfort without the complexity or cost of a full hybrid system. Owners benefit from reduced fuel expenses, especially in urban driving with frequent stops. The system adds minimal weight and does not require plug-in charging, making it a convenient upgrade. For truck buyers who need towing and cargo capabilities but want better fuel economy, eTorque provides a balanced solution. Understanding what eTorque is helps consumers make informed decisions when comparing powertrain options on Ram trucks.
Common Misconceptions
eTorque is a full hybrid system that can drive the truck on electric power alone.
eTorque is a mild hybrid; it only provides assist to the internal combustion engine and cannot propel the vehicle solely on electricity.
eTorque reduces towing capacity or payload ratings.
The eTorque system does not significantly affect maximum towing or payload; it is designed to maintain or enhance low-end torque for heavy-duty tasks.
eTorque requires special maintenance or battery replacement every few years.
The 48-volt lithium-ion battery is designed to last the life of the vehicle under normal conditions, and maintenance is similar to that of a conventional truck, with no special service intervals for the hybrid components.
FAQ
What is eTorque and how does it work?
eTorque is a mild hybrid system that uses a 48-volt belt-alternator-starter (BAS) and a lithium-ion battery. During acceleration, the BAS provides up to 12-14 horsepower of electric assist to the engine. It also enables smooth engine start-stop at idle and captures energy during braking to recharge the battery.
Does eTorque affect towing or hauling performance?
No. eTorque is designed to enhance low-end torque, which can improve towing and hauling capability. The system adds minimal weight and does not reduce maximum payload or towing capacity compared to the same engine without eTorque.
Is eTorque the same as a plug-in hybrid (PHEV)?
No. eTorque is a mild hybrid; it cannot be plugged in and cannot drive the vehicle on electricity alone. It only assists the gasoline engine and automatically recharges its battery through regenerative braking and engine power.
Leave a Reply