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If you want to learn about the 5.7L V-8 engine with eTorque in the Wagoneer and the 6.4L V-8 in the Grand Wagoneer, here's some information from Jeep.

The information about eTorque is pretty fascinating. I'm interested to see how much of a difference it makes behind the wheel.

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5.7-liter V-8 engine with next-generation eTorque hybrid system

Standard on Wagoneer, the 5.7-liter V-8 combines the muscle of 392 horsepower and 404 lb.-ft. of torque in a smooth, broad power band, enhanced with fuel-saving technologies that include variable camshaft timing and cylinder deactivation.

The Wagoneer is the first vehicle with the next generation eTorque hybrid system, which features enhancements to several fuel-saving features.

The eTorque hybrid system replaces the traditional engine-mounted alternator with a belt-driven motor generator unit. The motor generator unit works with a 48-volt battery pack to provide quick and seamless engine start/stop, torque addition to the engine crankshaft in certain driving situations and brake energy regeneration, which improves responsiveness and efficiency. The system enables up to 130 lb.-ft. of torque to be available on initial throttle tip-in.

The eTorque motor generator feeds energy to a 390 watt-hour lithium-ion 12-cell Nickel Manganese Cobalt (NMC)-Graphite battery. The small-suitcase-sized, air-cooled battery pack mounts to the floor inside the Wagoneer’s cabin.

Enhancements for the next-generation eTorque include:
  • E-motor Assist: The eTorque motor provides electric assist to the engine from launch until the battery pack reaches a minimal state of charge, with the duration determined by throttle input from the driver.
  • Deceleration fuel shutoff: The system completely shuts off fuel delivery to the engine while the Wagoneer coasts down from highway speeds and under braking, enhancing economy.
  • No-delay start/stop: The Wagoneer anticipates rolling stops, shutting down the engine as soon as vehicle speed reaches 0 mph, enhancing fuel savings. Engine restart with the eTorque motor is seamless and instant, even in aggressive driving conditions. Wagoneer accessories are powered by the battery pack while the engine is stopped.
Wagoneer and Grand Wagoneer are the latest vehicles from Stellantis to offer auto start/stop functionality on the highest paved roads in the United States, including Mount Evans (14,100 feet), and extended auto-stop durations of up to 10 minutes in ideal conditions.

The system recaptures energy during deceleration and braking feeds it to the battery pack. eTorque has been further optimized for cabin, battery pack, transmission and engine warming in cold conditions.

With Fuel Saver Technology (cylinder deactivation), the engine control computer turns off fuel and spark, and closes the intake and exhaust valves on four of the engine’s eight cylinders during light load operation, such as highway cruising when full power is not needed.

Variable camshaft timing helps maximize fuel economy by reducing the engine’s pumping work via a delayed closing of the intake valve, which increases the expansion process of the combustion event.

The 5.7-liter V-8 engine with eTorque hybrid assist in the 2022 Wagoneer features an 850-watt electric cooling fan using Pulse Width Modulation to tailor the fan’s energy draw to the cooling demand. Eliminating the traditional fan blade mounted to the front of the engine reduces fan noise and helps improve fuel economy by reducing parasitic losses.

Wagoneer utilizes a 3.21 axle ratio with the 5.7-liter V-8 engine with eTorque hybrid assist.

6.4-liter V-8 engine

The 6.4-liter V-8 engine delivers 471 horsepower and 455 lb.-ft. of torque. It is engineered to provide a broad torque band to deliver the optimal blend of power and comfort regardless of the load and terrain.

Engineered to deliver class-leading V-8 performance and best-in-class towing capability, the 6.4-liter engine receives some unique adjustments to set new benchmarks for both power and performance. These include a unique exhaust manifold, intake manifold and moving the air box to the right side of the engine bay.

The 2022 Grand Wagoneer benefits from the V-8 engine’s plentiful low-end torque, which delivers in demanding conditions such as towing a boat, camper or horse trailer.

The 6.4-liter V-8 enhances fuel economy with Fuel Saver Technology cylinder deactivation and variable camshaft timing.

Combined with a TorqueFlite eight-speed automatic transmission, Grand Wagoneer delivers a new level of performance: 0-60 miles per hour (mph) in 6.0 seconds.

Grand Wagoneer is standard with the 6.4-liter V-8 engine and 3.92 axle ratio allowing customers to optimize fuel economy and vehicle capability.
 
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