What Is Jeep Wrangler eTorque Mild Hybrid Technology?

The 2019 and 2020 Jeep Wrangler sported two engine options featuring their new eTorque Mild Hybrid Technology, which offers better fuel economy and improved towing capacity. This innovative Wrangler eTorque Mild Hybrid system improved fuel economy without sacrificing power, torque, or capability. And, it requires no additional effort from the driver and is part of the current 3.6L Pentastar V6 engine and the Turbocharged 2.0L I4 engine.

The new Jeep eTorque mild hybrid system is a replacement for the traditional alternator. It sports a belt-driven motor generator unit that executes several different functions. With gradual improvements, both engines with the 2024 Jeep eTorque systems really excel in engine restarting capability. The eTorque generator will restart the engine within 400 milliseconds by sending up to 90 lb-ft of torque to the engine crankshaft.

How Does Jeep Wrangler's eTorque Mild Hybrid Technology Work?

As described by MRTRUCK.com, “The Jeep Wrangler 4xe powertrain integrates two electric motors and a 400-volt battery pack with a fuel-efficient, turbocharged, four-cylinder engine and TorqueFlite eight-speed automatic transmission.” The high-voltage, liquid-cooled motor generator replaces the conventional alternator.

A 48-volt battery pack works with the engine-mounted motor generator to create:

• a seamless start/stop function;
• a short-duration torque addition to the engine crankshaft in particular driving conditions; and,
• brake energy regeneration to increase efficiency and responsiveness.

When the engine is running, eTorque's motor generator unit delivers 48-volt current to a 400-volt, 17-kWh lithium-ion Nickel Manganese Cobalt (NMC)-Graphite battery. The battery pack includes a 3-kilowatt DC-to-DC converter. This holds the battery's charge and converts 48 volts to 12 volts to charge its conventional 12-volt lead-acid battery for powering 4xe Hybrid Jeep Wrangler's accessories. The 3.6L Pentastar V6 engine and the Turbocharged 2.0L four-cylinder engine with Jeep eTorque technology does not use a traditional 12-volt starter motor.

About the size of a small suitcase, the air-cooled battery pack is mounted to the interior rear wall of Jeep Wrangler's cabin. The battery pack's case is insulated to hush the noise generate by the dual cooling fans. Cooling air is then drawn from the vehicle interior and released through the built-in cabin exhausters.

The second high-voltage motor generator mounts at the front of the transmission case to replace the conventional torque converter of an automatic transmission. The power and torque between the e-motor and engine are managed with two clutches (on/off binary clutch). “When this clutch is open there is no mechanical linkage between the engine and the e-motor, which enables it to propel the Wrangler 4xe in electric-only mode.” reports MRTRUCK.com

Beyond spinning the engine for restarts, the Jeep eTorque system also recaptures energy during deceleration and braking to recharge the battery pack. Further, eTorque also bolsters the driving experience of the 2019 and 2020 Jeep Wrangler with additional torque to the crankshaft during gear changes, which minimizes noise, vibration, and harshness (NVH).

Both engines sport a liquid-cooled Jeep eTorque unit mounted on the front of the engine, which uses a pair of belt tensioners to ensure that the 8-rib drive belt stays tight when the unit is generating electricity or adding torque to the crankshaft.

With the eTorque Mild Hybrid system, the 3.6L Pentastar V6 engine boasts 285 horsepower and 260 pound-feet of torque. Maximum torque arrives later in the rev range, at 4,800 rpm. The turbocharged 2.0L I4 engine generates best-in-class 270 horsepower and 295 pound-feet of torque.

Jeep Wrangler's eTorque Mild Hybrid Technology Warranty Information

The 2019 and 2020 Jeep Wrangler comes backed by a 5-year/60,000-mile Powertrain Limited Warranty, which covers the cost of all parts and labor needed for repairing a covered powertrain component – engine, transmission and drive system. Additionally, it covers any necessary towing to the nearest Jeep dealer. For users who sell their Wranglers during the warranty period, the coverage is transferable to the new owner.

The standard three-year/50,000-mile Basic Limited Warranty delivers bumper-to-bumper coverage for the 2019

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