Sunday, February 11, 2007

The Jeep Patriot 2.4L World Engine

The Jeep Patriot comes standard with the 2.4L 4-cylinder world engine. This powerplant was developed by GEMA (Global Engine Manufacturing Alliance), a joint venture between DaimlerChrysler, Hyundai Motor Company and Mitsubishi Motors Corporation. The ambitious objective of the alliance was to develop engines that could meet both aggressive performance and fuel efficiency targets. These goals were met through sophisticated cylinder head port and intake manifold design.

These technologies include dual Variable Valve Timing (VVT) and intake manifold design with flow control valves — technologies currently found only on more expensive performance and luxury engines in the American market. The horsepower and torque targets for the 2.4L world engine are among the best for four-cylinder engines – 170 horsepower and 165 lb-ft of torque.

Because fuel economy is a key factor in the four-cylinder market, the world engines are targeted to raise efficiency 5 percent over the engines they replace. These technologies also enable the engine to meet the ultra-clean ULEV II emissions standards.

GEMA set a high standard for sound quality and minimal noise, vibration and harshness (NVH). To meet these targets, engineers addressed NVH through several unique measures, including an isolated valve cover and a damped oil pan to reduce sound at the top and bottom of the engine.

GEMA has also produced a 1.8L and a 2.0L world engines. The 2.0L is offered as an option with the 2007 Jeep Patriot.


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