Stellantis’s all-new 3.0-liter twin-turbo inline-six cylinder engine is designed for enhanced fuel efficiency and superior performance. The new engine was designed on the basis of 2.0-liter turbocharged inline-four cylinder engine, currently available in the Jeep Wrangler, Wrangler 4xe, Cherokee and Grand Cherokee 4xe. The new Hurricane engine is designed to account for future integration with electrification for low emission vehicles.
The fuel efficient and powerful Hurricane engine accelerates Stellantis towards its commitment of 50 percent reduction in carbon emissions by 2030 and is an important part of its Dare Forward 2030 strategy. Stellantis aims to become carbon net zero by 2038. Stellantis will offer the Hurricane engine in two distinct variants, depending on the usage. The Standard Output (SO) variant will deliver more than 400 HP and 450 lb-ft of torque.
The more powerful High Output (HO) variant will deliver more than 500 HP and 475 lb-ft of torque, while maintaining reasonable fuel economy. Stelantis claims that the Hurricane engine is about 15 percent more fuel efficient than comparable V8 engines and the first vehicles powered by it will reach dealership showrooms this year. Stellantis intends to use this versatile engine with STLA Large and STLA Frame platforms in the near future along with electrification.
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The Hurricane engine uses two turbochargers, each feeding three cylinders. Using two small turbochargers instead of a single one results in lower inertia, negligible turbo lag and improved throttle responses. The high pressure fuel-injection system runs at 350 bar pressure, using injectors mounted centrally in the cylinder head combustion chamber. The turbochargers on the SO engine variant deliver peak boost of 22 psi, while the HO ones deliver peak boost of 26 psi.
To handle superior power and load, the pistons in the HO engine variant are forged and made of aluminum, coming with diamond-like coating on pins to minimize friction. The cylinder walls are sprayed with microstructure of metallic and oxide components that offer less friction and superior wear resistance. The PTWA coating is super thin and offers better resistance than 3-4 mm of cast iron liners.
The PTWA coating leaves more aluminum between the cylinders for better heat dissipation and cooling, enhancing the overall life of the engine. Better cooling enables engineers to optimize air-fuel ratio and advance the ignition timing (spark advance), over a wide operating range, resulting in reduced carbon-dioxide and other emissions. The 3.0-liter Hurricane twin-turbo inline-six engine is produced at Stellantis’ Saltillo Engine Plant in Mexico.
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