AUBURN HILLS, Michigan – Stellantis has revealed a three-litre, twin-turbo, six-in-line, engine, named it Hurricane, and declared it will deliver better fuel economy and less emissions than larger engines.
Oh, and it can generate more power/torque than many competitor’s unblown V8 and boosted six-cylinder engines, and offers two versions…
Standard output: For fuel economy and using cooled exhaust-gas circulation while delivering extra power and torque (more than 300kW/610Nm).
High output: More than 372kW/655Nm while maintaining “significant” fuel economy during heavy use, such as towing.
“The Hurricane twin-turbo,” Stellantis told The Corner in a media release, “achieves this V8-like performance while being up to 15% more efficient than larger engines.”
Micky Bly, Stellantis’ head of propulsion systems, told The Corner: “Stellantis wants to be leader in electrification so is aiming for 50/50 battery-electric/combustion – but internal combustion will be in our portfolio for years to come.
“We owe it to customers and the environment to provide the cleanest, most efficient, propulsion. The Hurricane twin-turbo will be no-compromise – better fuel-economy, less greenhouse gases but no performance penalty.”
But back to the now…
The Hurricane twin-turbo is said to have a broad, flat, torque-band that can maintain at least 90% of peak torque from 2350rpm to the red line. Specific power/torque ratings will vary according to vehicle.
“However, the first vehicles for sale in South Africa will be twin-turbo I-6 units.”
Hurricane twin-turbo power involves a deep-skirt, cast-aluminium block, and a structural aluminium-alloy oil pan. Steel cross-bolted main-bearing caps will contain the rotating assembly of forged-steel crankshaft and connecting rods.
ELECTRIC COOLING FOR TURBOS
Each turbocharger will feed three cylinders – two smaller ones with less inertia spin-up faster and deliver boost at fewer rpm than a single large turbo. The compressed air passes through an engine-mounted water-to-air charge air-cooler (chilled air is more dense so delivers more oxygen) to return better performance.
An electric pump will circulate coolant should the turbo units be stopped.
The turbos in the Hurricane SO deliver peak boost of 22psi, those in the Hurricane HO 26psi.