BMW plans lighter and more fuel-efficient engines

Munich. BMW will slowly replace its current generation of engines but will stick with in-line six-cylinder engines.

In September BMW plans to launch a new model family with two 3-liter engines. One is a gasoline engine with a performance of 258hp. The other is a diesel engine with 272hp and variable twin-turbo technology.

The new gasoline engine weighs only 161 kilograms - seven percent less than its predecessor. Performance is increased by 12 percent to 258hp while fuel consumption should drop by 12 percent according to BMW.

Engineers have designed a new magnesium-aluminum composite crankcase, which has reduced the weight of the engines by approximately ten kilos.

The gasoline engine will first be available in the 630i coupe and convertible while the diesel will have its premiere in the 535d.

Further capacity and performance variants are being developed and it is planned to use the engines in other BMW models.

Klaus Borgmann, head of motor engineering at BMW, said the use of Valvetronic is responsible for most of the fuel consumption reduction.

Valvetronic was introduced in 2001 and has since been further developed. It regulates opening and control duration of the valves and is infinitely variable depending on the position of the accelerator.

Burkhard Goeschel, BMW's head of engineering, believes that the new engines are proof that the classic internal combustion engine still has great potential in the future, despite the development of hybrid powertrains and fuel cell-powered vehicles.

Tags: Automakers BMW

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