Cadillac CT6 to Debut Next Generation Powertrain
• Industry’s most advanced - 3.0L Twin Turbo - V6
• An Improved 3.6L Atmospheric V6
• A New 8 Speed Automatic Transmission
• An Improved 3.6L Atmospheric V6
• A New 8 Speed Automatic Transmission
Cadillac is due to introduce a new generation of V-6 engines and a new 8 speed transmission which are set to power the flagship CT6 when it makes its world premiere on March 31s at the New York International Auto Show.
Led by an exclusive Twin Turbo V-6 that will be one of the industry’s most advanced six-cylinder gasoline engines. It leverages the latest technology to balance efficiency, performance and refinement in the upcoming, top-of-the-range CT6 luxury performance sedan.
An all-new 3.6L V-6 engine also makes its first appearance in the 2016 Cadillac CT6, setting benchmarks for efficiency, refinement and durability in the brand’s range-topping large luxury performance sedan.
Debuting on the CT6 will be Cadillac’s eight-speed automatic transmission. The 8L45 transmission – matched to the 3.6L V6 - is based on the same acclaimed General Motors-designed eight-speed automatic family introduced on the Corvette Stingray – with the higher-capacity 8L90 version paired with the 3.0L twin-turbo V-6 on the CT6.
Led by an exclusive Twin Turbo V-6 that will be one of the industry’s most advanced six-cylinder gasoline engines. It leverages the latest technology to balance efficiency, performance and refinement in the upcoming, top-of-the-range CT6 luxury performance sedan.
An all-new 3.6L V-6 engine also makes its first appearance in the 2016 Cadillac CT6, setting benchmarks for efficiency, refinement and durability in the brand’s range-topping large luxury performance sedan.
Debuting on the CT6 will be Cadillac’s eight-speed automatic transmission. The 8L45 transmission – matched to the 3.6L V6 - is based on the same acclaimed General Motors-designed eight-speed automatic family introduced on the Corvette Stingray – with the higher-capacity 8L90 version paired with the 3.0L twin-turbo V-6 on the CT6.
New V-6 Engine Family Highlights:
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3.0L Twin-Turbo V-6 Highlights:
3.6L V-6 Highlights:
The clean-sheet engine design is the fourth generation of GM’s acclaimed DOHC V-6 engine family and incorporates new features, including Active Fuel Management (cylinder deactivation) and stop/start technology to enhance fuel economy up to a General Motors’-estimated 9 percent when compared to the previous engine
The 8L45 & 8L90 Eight Speed Automatic Highlights:
The 8L45 eight-speed shares the architecture and design features of the Hydra-Matic 8L90 transmission, but it is scaled and calibrated for the performance envelope of the new 3.6L V-6. It also incorporates components to support the engine’s stop/start technology
- Lower 9.8:1 compression ratio vs. 11.5:1 on the naturally aspirated 3.6L
- Extreme duty 44MnSiV6 steel crankshaft forging
- The pistons incorporate a specific steel insert in the top ring land to support the turbocharged engine’s higher cylinder pressures
- Valve spring pre-load tension is increased to manage the greater exhaust pressure during peak load performance
- Hardened AR20 valve seat material on the exhaust side is used for its temperature robustness, while the heads are sealed to the block with multilayer-steel gaskets designed for the pressure of the turbocharging system
- Tuned air inlet and outlet resonators, aluminum cam covers and other features contribute to exceptional quietness and smoothness.
- Twin, low-inertia turbochargers’ featherweight titanium-aluminide turbines are with vacuum-actuated wastegate control for precise, responsive torque production, which practically eliminates lag, for an immediate feeling of power delivery.
- The advanced, low-inertia turbochargers enable the engine to sustain peak torque from 2,500 rpm to 5,000 rpm.
- Peak output is estimated at 400 horsepower and 400 lb-ft of torque (543 Nm), making it one of the most power-dense, V-6 DOHC engines in the world, developing 133 horsepower per liter.
3.6L V-6 Highlights:
The clean-sheet engine design is the fourth generation of GM’s acclaimed DOHC V-6 engine family and incorporates new features, including Active Fuel Management (cylinder deactivation) and stop/start technology to enhance fuel economy up to a General Motors’-estimated 9 percent when compared to the previous engine
- Noise-reducing features, including an all-new cam drive system, contribute to the new 3.6L being up to 4 dB quieter at idle and under low load driving conditions than the benchmark Infiniti 3.7L V-6.
- Output is SAE certified at 335 horsepower and 284 lb-ft of torque (385 Nm).
- Oil-spray piston cooling; helps reduce noise, lower combustion temperatures and enhance durability by drenching the underside of each piston and the surrounding cylinder wall in an extra layer of cooling, friction-reducing engine oil.
- An all-new cylinder head design builds on the airflow attributes of the current V-6, to ensure excellent low-rpm torque, for strong power at take-off, and excellent airflow at high-rpm, for greater horsepower.
The 8L45 & 8L90 Eight Speed Automatic Highlights:
The 8L45 eight-speed shares the architecture and design features of the Hydra-Matic 8L90 transmission, but it is scaled and calibrated for the performance envelope of the new 3.6L V-6. It also incorporates components to support the engine’s stop/start technology
- The wide 7.0 overall ratio and numerically lower top gear offer an up to a GM estimated 5 percent fuel economy benefit over a comparable six-speed automatic transmission.
- The numerically higher 4.62 first gear ratio aid start off and immediate performance.
- Creative packaging enables GM’s eight-speed automatic to fit the same space as the previous six-speed automatic, with a 15kg weight reduction.
- Smaller steps between gears keep the engine within its optimal rpm range.
- Friction-reducing design features – including synthetic fluid –contribute to efficiency.
- Improved torque converter design enhances refinement, particularly during low-speed gear changes.
- World-class shift time quickness and responsiveness are accomplished with a Gen II controls system, which works with variable force solenoid technology and three internal Hall Effect speed sensors
- The transmission controller is external, and its processor executes hundreds of calculations and commands every 6.25 milliseconds.