Jeep Liberty – Wikipedia, the free encyclopedia

19 Apr 2015 | Author: | Comments Off on Jeep Liberty – Wikipedia, the free encyclopedia

First generation KJ (2002–2007) [ edit ]

3,508-4,312 lb (1,591-1,956 kg)

Inspired by styling from the Dakar [ 4 ] and Jeepster [ 5 ] concept vehicles. the Liberty was intended as a replacement for the discontinued Jeep Cherokee. The Liberty also marked a few firsts for Jeep. It was the first Jeep vehicle to use rack and pinion steering. [ 6 ] It also the first Jeep to use the two then-new PowerTech engines; the 150 horsepower (110#160;kW) 2.4 L straight-4. which was discontinued in 2006, and the 210 horsepower (160#160;kW) 3.7 L V6.

However, the Liberty was not the first Jeep vehicle to use an independent front suspension. as the Jeep Wagoneer first used it in the 1963 model. But, that independent front suspension was limited to four wheel drive versions and, even then, was a short lived option. [ 7 ] In addition, the Liberty was nominated for the North American Truck of the Year award for 2002.

CRD in North America [ edit ]

In 2005, DaimlerChrysler began offering a diesel engine to the North American market to gauge the marketability of diesel engines in North America. The last North American market Jeep product that was offered with a diesel engine was the 1987 Jeep Cherokee and Comanche. Only available for 2005 and 2006 in Sport and Limited trims, the 2.8L VM Motori R 428 I4 common rail turbo diesel or CRD exceeded expectations by selling 10,000 examples in its first calendar year of production.

The diesel utilized a variable geometry turbocharger and generated 160 horsepower (120#160;kW) and 295#160;lb·ft (400#160;N·m) of torque. Offering 60 more foot lbs of torque than the comparable V6 gasoline engine and offered higher fuel efficiency; [ 8 ] but it added nearly 200 pounds (91#160;kg) to the curb weight. a price increase, and offered less peak horsepower.

The CRD was prohibited from being sold in Maine, Vermont, Massachusetts, New York, and California due to their higher emission standards and was discontinued for 2007 due to stricter federal emission standards in the United States. The next year Jeep offered the Jeep Grand Cherokee with a diesel engine option; which was 50-state emission legal.

Four wheel drive systems [ edit ]

The Liberty is available with either a part-time Command-Trac or full-time Selec-Trac transfer case.

The Command-Trac transfer case has four positions: 2-HI, 4-HI, Neutral, and 4-LO. The lever is placed in 2WD HI for regular driving. This allows the two rear tires to receive power.

The second position, 4WD HI, is used for driving on slippery or loose surfaces. This position locks both the front and rear drive shafts together allowing the vehicle to maintain drive as long as at least one axle has traction. The third position, Neutral, disengages both drive shafts from the transfer case allowing the car to roll freely; this is used for towing behind another vehicle, for example.

The last position, 4WD LO is used for situations requiring higher torque or slow speed when traversing rough terrain. A common misconception is that 4WD LO provides more traction. It only changes the gear ratio and does not add any more friction between the tires and the driving surface.

This position, like 4WD HI locks both the front and rear drive shafts together, and by using a lower gear ratio, allows for 2.72 times more torque (however, the speed is limited to around 25 MPH max). It should be noted that turning while in 4WD HI or LO on dry pavement is hazardous to vehicle components, through driveline binding and wheel-hop.

The Selec-Trac transfer case has five positions: 2-HI, 4-HI Part-Time, 4-HI Full-Time, Neutral, and 4-LO. The transfer case is different from the Command-Trac transfer only in the extra 4WD HI Full-Time position. The 4WD HI Full-Time position adds the same traction benefits that the part-time 4WD setting offers, but features an open differential between the front and rear axles to allow the two axles to spin at independent speeds and eliminate drive line binding and wheel-hop.

The down side of 4WD Hi Full-Time is that, due to the open differential between front and rear drive lines, at times the drive train will only deliver power to the front or the rear e.g. when the front of the vehicle has reached a high traction surface such as dry pavement and the rear is in sand, the rear tires will spin with 100% of engine power, the front receiving no traction. Under equal traction conditions (front-rear) this position gives the rear wheels 52% of the engine’s power and the front wheels 48% of the engine’s power. The division of power and open center differential allows the Selec-Trac transfer case to be operated at all times in an All Wheel Drive mode with no adverse effects.

Government/Fleet use [ edit ]

Even though no special Jeep Liberty was introduced in 2002 for police use, police and rental agencies continue to purchase it for fleet use. Most are equipped with the 3.7L Power-Tech V6 Engine that produces 210 horsepower mated to a 5-Speed Automatic Transmission, however, some fleet Liberties used a 2.5L I4 Engine that produced about 150 horsepower with a 4-Speed Automatic Transmission. In 2008, when the Jeep Liberty was fully redesigned, the I4 engine was dropped, and the V6 engine was the only engine choice, as was the 4-Speed Automatic Transmission. Most fleet and government Liberties also use either the Selec-Trac or Selec-Trac II 4WD Systems, but some Liberties used 2WD .

Since it was introduced in late 2001 as a 2002 Model Year vehicle to the time it was discontinued in 2007, the Liberty KJ also found its way into rental car fleets. Most rental Liberty KJ’s were the V6 -powered Sport models with automatic transmissions and 4WD .

International versions [ edit ]

European badged Cherokee Renegade

Numerous versions were available in markets outside the U.S. and Canada.

Early-2002 through mid-2003 model year CRDs were equipped with a 2.5lt VM Motori Diesel producing 105#160;kW (143#160;PS; 141#160;hp) and 343#160;N·m (253#160;lb·ft). An external wastegated turbo was standard and the engine was available only with a manual transmission .

A commercial Cherokee version with 2.5 CRD engine and five-speed transmission rated at 34.4#160;miles per imperial gallon (8.21#160;L/100#160;km; 28.6#160;mpg -US ) has a completely flat cargo area (the rear seat area has a carpeted full-length galvanized metal floor) and the rear quarter glass and rear door glass is replaced with fixed body colored aluminum panels (the front doors have power windows). For additional cargo security a removable floor to ceiling metal and mesh bulkhead is optional. In European markets, VAT registered buyers can claim back the tax paid as this qualifies as a Commercial Vehicle.

Arab American Vehicles Company (a joint venture) assembles the Jeep Cherokee (Liberty) for the Egyptian market.

Carabobo Assembly Plant (DaimlerChrysler de Venezuela) assembles the Jeep Cherokee (Liberty) in Valencia, Carabobo for the Venezuelan market.

Second generation KK (2008–2013) [ edit ]

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