All-new 2018 Jeep Wrangler fuel-efficient powertrains revealed

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FCA took the opportunity at the Los Angeles Auto Show to flaunt their latest and all-new 2018 Jeep Wrangler that delivers a combination of off-road capability, authentic Jeep design, open-air freedom, advanced fuel-efficient powertrains, superior on- and off-road dynamics, and a host of innovative safety and advanced technology features.

The advanced fuel-efficient powertrains are the theme of the write-up today. The 3.0-liter EcoDiesel V-6 and all-new 2.0-liter turbocharged inline four-cylinder engines join the Wrangler lineup, while the 3.6-liter Pentastar V-6 engine is upgraded for 2018.

2.0-liter turbocharged I-4 engine
The all-new 2.0-liter turbocharged inline four-cylinder engine with eTorque technology is rated a best-in-class 270 horsepower and 295 lb.-ft. of torque and mated to a new eight-speed automatic transmission. The 2.0-liter turbocharged inline four-cylinder (I-4) engine’s torque output surpasses that of the V-6 engine offered in Wrangler. The all-new eTorque system improves fuel economy, launch performance, and driver comfort during start/stop operations.

The eTorque system’s hybrid functions include auto stop/start, electric power assist, extended fuel shut-off, transmission shift management, intelligent battery charging and regenerative braking. Both the engine and fuel flow may be turned off during stops, coasting or when the engine is decelerating.

The all-new 2.0-liter I-4 engine features a twin-scroll, low-inertia turbocharger with an electronically actuated waste gate for exceptional responsiveness and performance, even while traversing over difficult terrain. The turbo is mounted directly to the cylinder head to improve durability. A dedicated cooling circuit lowers the temperature of the intake air, throttle body and turbocharger.

Direct injection, coupled with turbocharging, enables more efficient combustion and increased performance. The 2.0-liter I-4 engine’s fuel pump supplies the engine’s 2,900-psi high-pressure common-rail injection system. These high pressures produce better fuel atomization and allow for more precise fuel delivery than port fuel-injection systems, which in turn improves both performance and efficiency.

The 2.0-liter turbocharged I-4 engine is part of the Global Medium Engine architecture family and features Double Overhead Camshafts (DOHC), dual independent camshaft timing, and a cooled exhaust gas recirculation (C-EGR) system. This is the first time that the combined use of a twin-scroll turbocharger, C-EGR system, Central Direct Injection and the independent liquid cooling intake of air, throttle body and turbo have been employed together. This combination of technologies enables the high levels of performance and reduces fuel consumption.

3.6-liter Pentastar V-6 engine
The FCA US 3.6-liter Pentastar V-6 engine delivers 285 horsepower and 260 lb.-ft. of torque and now features Engine Stop-Start (ESS) as standard equipment. It is engineered to provide a broad torque band with a focus on low-end torque – an essential trait needed for extreme off-roading.

An all-new six-speed manual transmission is standard on all Wrangler models equipped with the 3.6-liter Pentastar V-6, and a new-to-Wrangler eight-speed automatic transmission is optional.

Known for its refinement, power, efficiency, and adaptability, there are more than five million 3.6-liter V-6 Pentastar engines on the road today. The 2018 Jeep Wrangler benefits from the popular V-6 engine’s low-range torque, which is needed when out on the trails or whenever the conditions call for it.

3.0-liter EcoDiesel V-6 engine
The 3.0-liter EcoDiesel engine will be available starting in 2019. Wrangler 4-door models will offer the 3.0-liter EcoDiesel V-6 engine, rated at 260 horsepower and 442 lb.-ft. of torque, with Engine Stop-Start (ESS) standard. A new eight-speed automatic transmission is standard and is designed to handle the increased torque output.

FCA US engineers adapted the engine – manufactured by FCA-owned V.M. Motori – to meet the NAFTA region’s regulatory requirements.

Starting in 2019, the EcoDiesel V-6 engine implements new turbocharger technology with a low-friction bearing designed for low end and transient performance. The upgraded EcoDiesel V-6 engine now also features low-friction pistons to improve fuel economy, reduce greenhouse gas emissions and provide an enhanced combustion system – new injector nozzle, piston bowl, and glow plug with integrated combustion pressure sensor to optimize combustion.

Class-exclusive eight-speed automatic transmission
The new 2018 Jeep Wrangler offers an eight-speed automatic transmission, enabling the vehicle to optimize engine output while on the trails or enjoying smooth, efficient power delivery at highway speeds. The eight-speed automatic is available on all Jeep Wrangler models.

Wrangler’s eight-speed automatic transmission offers a responsive driving experience. Whether commuting during the week or rock crawling on the weekend, customers will enjoy a smooth, linear power delivery and improved fuel efficiency.

A unique set of two overdrive ratios improve highway fuel economy and reduce overall noise, vibration and harshness (NVH) levels.

Uniquely suited to the requirements of the Wrangler Rubicon model, the eight-speed automatic transmission delivers a 77.2:1 crawl ratio. The improved 4×4 performance benefits from a 4.7:1 first gear ratio coupled with a 4.1:1 final drive delivers unmatched capability.

Six-speed manual transmission
All-new 2018 Jeep Wrangler models are equipped with the new standard six-speed manual transmission. This transmission features a unique design that employs new gear ratios for improved crawl ratio performance, a new gear pattern, and a cable-operated design, which eliminates shifter vibration and improves sound isolation.

The revised shift pattern features improved shift accuracy, a more comfortable shifting position and 50-percent shorter shifter throws than that of the outgoing Wrangler model.

A 4.41 ratio spread offers improved fuel efficiency at faster speeds and delivers quick acceleration with smooth, precise shift quality.

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