Stellantis has introduced a new rapid-development concept designed to reduce turbo lag in its Hurricane inline-six engine. Called eBoost Air, the system uses an electric compressor positioned ahead of the engine’s twin turbochargers to help them build boost more quickly, with the goal of delivering a driving experience that more closely resembles a supercharged V8.
How the eBoost Air System Works
Unlike systems that directly spin a turbocharger using an integrated motor-generator unit, the eBoost Air concept takes a different approach. The electric compressor is mounted upstream of the Hurricane engine’s twin turbos and rapidly feeds air into them before exhaust gases are able to generate sufficient boost.
According to Stellantis’ SRT Performance Division, the objective is to improve throttle response and reduce the delay typically associated with turbocharged engines.
Designed to Mimic Supercharged V8 Performance
SRT said the technology is intended to make the Hurricane engine behave more like a supercharged V8. While Stellantis developed the Hurricane engine family as its modern high-performance powertrain, the company noted that eBoost Air could potentially find its place in future high-performance Jeep models.
Once exhaust gas flow reaches the point where it can fully drive the turbochargers, the electric compressor disengages and is bypassed entirely.
The system does not recover spent energy, but it does require a 48-volt electrical system to operate.
Still in the Proof-of-Concept Stage
Stellantis described eBoost Air as a “rapid-development proof of concept.” The company said additional work is required before the technology could be introduced on Hurricane-powered models in the United States.
Currently, only certain non-Hurricane Jeep models and Ram 1500 trucks equipped with the Hemi V8 feature the company’s 48-volt mild-hybrid eTorque system. The article notes that a secondary battery could be one possible solution for future applications, although that remains unconfirmed and undecided.
Engineering Challenges During Development
Integrating the technology into the Jeep Grand Cherokee’s engine bay required significant engineering work. The Hurricane inline-six has not yet appeared in a production version of Jeep’s midsize SUV, meaning the project first had to address basic packaging requirements.
Engineers also needed to create space for what effectively became a third air intake dedicated to the electric compressor. Despite those challenges, the SRT team completed the project in just seven weeks.
Focus Is Faster Power Delivery, Not More Horsepower
SRT emphasized that eBoost Air does not increase the Hurricane engine’s peak output. Instead, it enables the engine to reach its existing power levels more quickly by reducing turbo lag.
The twin-turbocharged 3.0-liter Hurricane inline-six already delivers strong performance, with its high-output version producing 540 horsepower and 510 lb-ft of torque.
By improving boost response rather than adding horsepower, the eBoost Air concept is designed to enhance acceleration while preserving the Hurricane engine’s existing performance figures.
For now, the technology remains an experimental concept as Stellantis continues evaluating its potential for future Hurricane-powered vehicles.
