Global Engine Manufacturing Alliance

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Global Engine Manufacturing Alliance
GEMA corporate logo
Type of Company Joint venture
Founded May 2002
Headquarters Dundee, Michigan
Key people Bruce Coventry (President)
Industry Automotive engineering
Products Engines
Parent DaimlerChrysler
Hyundai Motor Company
Mitsubishi Motors
Website GEMAengine.com

The Global Engine Manufacturing Alliance, or GEMA, is a manufacturing arm of Global Engine Alliance LLC, which is a joint venture of DaimlerChrysler, Mitsubishi Motors, and Hyundai Motor Company for developing a line of shared engines.

Contents

[edit] GEMA

GEMA has five factories worldwide; two in Dundee, Michigan, United States, two in South Korea and one in Shiga, Japan. Production began in 2005 and will continue at least through 2012 with an annual capacity of approximately two million engines; each plant will be capable of producing 420,000. Twenty different automobile models from the three companies will use the engines. Each manufacturer has configured their variants of the basic GEMA design differently, so consumers will likely experience different power, fuel efficiency, and "feel" from each manufacturer.

The plan to pool resources and share risks was dealt a serious setback when DaimlerChrysler announced in 2004 that it would sell its stake in financially-troubled Mitsubishi. Mitsubishi subsequently announced that it would scale back GEMA engine purchase projections, which may affect the expected economies of scale.

[edit] Chrysler's GEMA engines

GEMA produces a single family of 4-cylinder engines with variable valve timing, marketed by Chrysler as the World Engine. The range starts with a 1.8 L unit which will principally find use throughout the world, and includes 2.0 L and 2.4 L variants which will find use in the United States. Turbocharged and supercharged versions may also be produced, as in Chrysler's similar Tritec engine.

Chrysler expects to use the GEMA family of engines in nine other models and projects that it will buy up to 840,000 GEMA engines annually.

The initial design of the engine block was handled by Hyundai. It features siamesed bores, meaning that there is no coolant flow between cylinders. The aluminum block has cast iron cylinder liners, and different liners can be fitted to alter the engine's bore.

The heads feature electro-hydraulic variable valve timing on both the intake and exhaust side. The system was based on that used by the recent Mercedes-Benz 24-valve V6 and is quite sophisticated and expensive for a low-end engine. A variable tumble control system creates air tumbles in the intake runners at low rpms for better mixture. Valves are directly actuated by solid Bucket tappets.

[edit] 1.8

Applications:

[edit] 2.0

The 2.0 L GEMA engine is used by Chrysler as the middle engine in its new Dodge Caliber, which is a replacement for the Dodge Neon. The GEMA offers an increase in power over the 2.0 L Neon engine, from 132 to 150 hp (98 to 112 kW). For Europe, the 2.0 will be the base engine for the 2007 Chrysler Sebring.

Applications:

[edit] 2.4

The 2.4 L 172 hp (127 kW) variant of the GEMA engine was scheduled by Chrysler for use in the performance-oriented R/T trim line of the Caliber. A 300 hp (224 kW) turbocharged version of this engine will be used in the high-performance SRT-4 version of the Caliber. This engine also became the base engine in the 2007 Chrysler Sebring and 2008 Dodge Avenger, since the previous generation Sebring and the Stratus used the 2.4 L Neon engine as their base engine offering.

Applications:

[edit] See also

[edit] External links

[edit] References

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