December 2, 2022
  • December 2, 2022
  • Home
  • Mechanical power
  • Jeep presents the first PHEV Grand Cherokee: 2022 Grand Cherokee 4xe with 25 AER miles

Jeep presents the first PHEV Grand Cherokee: 2022 Grand Cherokee 4xe with 25 AER miles

By on September 30, 2021 0


The Jeep brand has introduced the fifth-generation Jeep Grand Cherokee, including the first available plug-in hybrid powertrain, the Jeep Grand Cherokee 4xe. The all-new Jeep Grand Cherokee will arrive at Jeep dealerships in North America in the fourth quarter of 2021. The Jeep Grand Cherokee 4xe is expected to arrive in North America in early 2022 and in global markets later that year.

Jeep Grand Cherokee Trailhawk 4xe

Available in the Grand Cherokee Limited, Trailhawk, Overland, Summit and Summit Reserve, the 4xe propulsion system combines two electric motors, a 400-volt battery, a 2.0-liter four-cylinder turbocharged engine and an eight-speed automatic transmission. TorqueFlite. 4xe PHEV technology targets around 25 miles (40 km) of all-electric range and 57 MPGe and delivers:

  • 375 horsepower and 470 lb-ft of torque

  • Quadra Trac II 4×4 system with two-speed transfer case and low-end 2.72: 1 gear ratio

  • Exploration ratio of 47.4: 1

  • 6,000 lb (2,720 kg) 4xe maximum towing capacity

Overall, the 4xe system delivers 375 horsepower (280 kW) and 470 lb-ft (637 N m) of torque. The Grand Cherokee 4xe, targeting around 25 miles (40 km) of all-electric range, returns around 57 MPGe and has an estimated total range of over 440 miles (708 km).

The fuel-efficient 2.0-liter turbocharged I-4 engine is part of Stellantis’ Global Medium Engine family. The high-tech direct injection engine uses a twin-scroll, low-inertia turbocharger mounted directly to the cylinder head. Efficiency is improved through the use of electric power steering and an electrically driven air conditioning compressor, removing these loads from the engine.

The conventional alternator is replaced by a high voltage liquid cooled generator. Connected to the engine crankshaft pulley via a belt, the motor-generator spins the engine for nearly seamless on-off operation, fuel efficient and generates electricity for the battery pack.

A larger high voltage motor-generator is mounted in the transmission, replacing the torque converter. Two clutches manage the power and torque of the electric motor and the motor.

A clutch is mounted between the engine and the engine. When the system operates in electric mode only, this clutch is open, so there is no mechanical connection between the motor and the electric motor. When the clutch is closed, the combined torque of the 2.0-liter engine and electric motor flows through the automatic transmission. A variable clutch mounted behind the electric motor manages engagement with the transmission to improve handling and efficiency.

The Jeep Grand Cherokee 4xe is equipped with a 400 volt, 17 kWh EV battery. Battery units and controls mount under the vehicle, packaged under the floor and protected by a series of skid plates.

The battery system includes a dedicated heating and cooling circuit to keep the battery at its optimum temperature for best performance. The system includes a dedicated heater unit and a chiller that uses the Grand Cherokee’s air conditioning refrigerant to reduce the coolant temperature when needed.

The Grand Cherokee’s 4xe system also includes an Integrated Dual Charge Module (ICDM) that combines a battery charger and DC / DC converter into a single compact unit and a downsized Power Inverter Module (PIM). These are mounted under the body and protected by steel shields.

All high voltage electronic components are sealed and waterproof. The Trail Rated Jeep Grand Cherokee 4xe is capable of fording up to 24 inches (61 cm).

The charging port is located under a snap-open / close cover on the left front fender for convenient parking in the charging slots. The charging port includes LED charge status indicators. An LED battery level indicator sits above the dashboard, making it easy to check the battery charge status at a glance while charging.

With E Selec modes, the driver of the Jeep Grand Cherokee 4xe can tailor the hybrid powertrain to the best of every trip, whether it’s commuting, off-road or long haul.

The driver selects the desired powertrain mode via buttons mounted on the instrument panel, to the left of the steering wheel:

  • Hybrid: Mixes the torque of the electric motor and the gasoline engine. The powertrain will optimize battery and engine power to deliver the best combination of fuel efficiency and performance.

  • Electric: Runs on zero-emission electric power only until the battery reaches minimum charge or the driver calls for more torque (like wide-open throttle), which engages the engine.

  • eSave: Gives priority to the motor, saving battery charge for later use. The driver can also choose between battery saving and charging the battery during eSaving via the hybrid electric pages of the Uconnect 5 monitor.

Regardless of the mode selected, the Grand Cherokee 4xe operates as a hybrid once the battery approaches its minimum state of charge.

The driver information screen and the main touchscreen include Eco Coaching pages. Eco Coaching pages allow owners to monitor power flow and see the impact of regenerative braking, plan charging times to take advantage of lower electric rates, and view their driving history with detailed consumption electricity and gasoline.

Regenerative braking is part of the 4xe system. When the driver presses the brake pedal, the powertrain control engages the maximum available regenerative braking, up to 0.25g, from the electric motors to slow the vehicle, complemented by the traditional friction brakes of the Grand Cherokee. With the 4×4 engaged, all four wheels provide torque for regenerative braking, maximizing energy recovery. Electricity from regenerative braking is fed to the battery pack to maintain or increase the state of charge.

A driver-selectable Max Regen function deploys a more assertive regenerative braking calibration when the vehicle sees zero throttle input from the driver (coasting). Max Regen can slow the Grand Cherokee 4xe faster than standard regenerative braking and generate more electricity for the battery.