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Cherokee diesel details

by David Zatz on

A new but credible source wrote that the 2014 Jeep Cherokee will indeed use the Fiat two-liter diesel engine, the first time this powerplant has been used by Jeep. Certified by EU5+ emission standards, it will be sold only in countries that have low-sulfur diesel fuel (this includes some regions of India).

The Cherokee’s version of the Fiat 2.0 MultiJet will have peak power of 170 hp (125 kW) at 4,000 rpm, with a hefty 258 lb-ft of torque (350 Nm) available at 1,750 rpm — when paired with the nine-speed automatic. In countries with power-based taxation, and when paired with the six-speed manual, a lower output diesel (140 hp) will be available. The Fiat diesels are highly respected, despite some issues with carbon/soot buildup with the EGR system.

2014 jeep cherokee

The engine has a cast iron block with aluminum heads with dual overhead camshafts, roller cam followers, and four valves per cylinder. The common rail system has up to 1,600 bar fuel pressure, and can handle multiple injection events with post-injection and combustion-rate shaping for particulate filter control. A variable geometry turbocharger (pioneered by Chrysler decades ago, under the name “Turbo IV”) cuts turbo lag, while cooled EGR cuts emissions and fuel usage. A fully balanced, forged crankshaft cuts deflection and vibration.

The diesel, sold only in export markets, will be available with either front wheel drive or 4×4, and includes stop-start technology (at least with the automatic).  Balance shafts will cut vibration, while a right-side engine mount brace will stiffen the mounting. The oil change interval is, as with domestic Chrysler gasoline engines, determined by internal software, but the target is to be able to reach up to 35,000 km (nearly 22,000 miles) between oil changes in the best case.  It will be B7 (7% biofuel) certified.

This engine is also used in the Fiat Freemont, which does 0-62 mph (0-100 km/h) in 11.0 seconds with the higher-power engine and in 12.3 seconds with the lower-power engine. By comparison, the European gasoline version, with 283 hp and similar torque, is rated at 0-60 in 8.4 seconds. The Cherokee will almost certainly accelerate much faster, with its nine-speed automatic providing better launches.

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