Jaguar bringing new turbocharged I-4, supercharged V6 engines to market
Based on the key technology in the Jaguar 5-liter V8, the supercharged 3-liter V6 will come tuned for either 340 or 380 horsepower. The 2-liter turbocharged I-4 engine will develop 240 horsepower from its inline configuration.
The more powerful 380 hp model of the 3-liter V6 will only be available in the forthcoming Jaguar F-TYPE roadster, though both engines are mated to eight-speed automatic transmissions. The V6 engines will also feature Jaguar's new Intelligent Stop-Start system.
The new Jaguar F-TYPE two seat roadster, the first car to feature the 380 hp supercharged V6, is expected in 2013. The Jaguar F-TYPE will deliver unparalleled performance while doing so with a bit more economy and environmental consideration.
"Jaguar currently has its strongest range of products for several decades,” said Adrian Hallmark, Global Brand Director for Jaguar Cars. “Our continued growth is dependent on two things; activating the awareness of the brand, and expanding our range to enable us to access new customers in both existing and emerging markets. The introduction of these two additional forced-induction engines is integral to this ambitious plan."
The engineering design of the new V6 was based on the technology of the proven 5-liter V8, a widely praised all aluminum alloy engine used for everything from luxury sedans to 186-mph exotic sports cars. The supercharged V6 takes advantage of various aspects of the V8 including direct injection and variable valve timing. Offering comparable levels of performance to the naturally aspirated version, the supercharged vehicle does so with greater efficiency and output for its size.
The 2.0-liter turbocharged I-4 engine produces 240hp via three key enhancements, namely low-inertia turbocharging, direct fuel injection and variable timing of both intake and exhaust camshafts.
"Both these new engines make intelligent use of forced-induction technology to produce high-specific output in an efficient way, while delivering the compelling combination of flexibility, refinement and driver reward that are integral attributes in all Jaguar engines," said Ron Lee, Group Chief Powertrain Engineer for Jaguar Cars.
The new quad-cam V6 takes advantage of a lightweight aluminum alloy die-cast block reinforced with cross-bolted main bearing caps to increase rigidity. The positive and negative torques, generated by the movement of the intake and exhaust valves, provide the basic rhythm to the dual independent variable cam timing system. It allows actuation rates over 150 degrees per second across the rev range, optimizing power, torque and economy at all speeds.
Spray-guided direct injection of precisely controlled amounts of fuel are thrust into the exact center of the combustion chambers at pressures of up to 2,176 PSI, ensuring a highly responsive, uninterrupted power supply. Delivering fuel multiple times during the combustion cycle creates a balanced air-fuel mixture resulting in cleaner, more efficient combustion.