The performance of a gasoline engine, the high torque and fuel economy of a state-of-the-art diesel together with extremely clean emissions: Mercedes-Benz has combined all the advantages of both engine types in its DiesOtto powertrain. The new technology package, which stands for the future of the gasoline engine, includes features such as direct gasoline injection, turbocharging and a variable compression. At the core of this innovation lies the controlled auto ignition, a highly efficient combustion process similar to that of a diesel. By way of another advantage, and in contrast to comparable developments, the Mercedes system requires no synthetic fuels but can be operated using conventional gasoline.

Optimising the inside combustion engine is one of the milestones on the Mercedes-Benz roadmap for sustainable mobility. BLUETEC has already made it viable for Mercedes engineers to make the mighty and economical diesel as clean as the gasoline engine. In the US this technology has already been offered in the E-hall because 2006, and it will also become offered in Europe from the end of this year. The E 300 BLUETEC will be by far the cleanest diesel in its category, and will sectione the requirements of the EU5 exhaust release values in packed.

"Our next goal will now be to make the gasoline engine as economical as a diesel. All the preconditions for this are provided by our DiesOtto notion, which incorporates the principal strengths of both the gasoline engine and diesel engine," says Prof. Dr. Herbert Kohler, lead of Group study & future Engineering Vehicle and Powertrain; Chief Environmental official of DaimlerChrysler.

The effect of this " nuptials " is a four-cylinder section with a displacement of just 1.8 litres, which mingles the strengths of the low-release gasoline engine with the fuel economy of a diesel. although its considerably cheap displacement C downsizing is one of the foremost factors for achieving a reduce fuel consumption C this compact right section delivers higher performance together with refinement at the point of the luxury category. An crop of 175 kW/238 hp and a highest torque of 400 newton metres are achieved together with the amalgamisation a fuel consumption of minus than six litres of gasoline per 100 kilometres. This cost by no means relates to a small or compact car, but to a vehicle the bulk of the existing S-hall, with the point of comfort and wellbeing that is average of a Mercedes.

Mercedes-Benz DiesOtto C a expand development of the glow-ignition engine

" In line with the worldwide star of nowadays's diesel engine, vehicles equipped with gasoline engines will prolong to have a long-duration attraction for many consumers and in many markets. Accordingly we are generous our mind to both engine varietys C plus a packed amalgam choice for diesel and gasoline vehicles, " says Prof. Kohler. Mercedes-Benz is running on its DiesOtto notion with corresponding stress. Its key technological features are as follows:

Downsizing with less cylinders and a lesser displacement

Turbocharging for higher performance

upfront gasoline injection as a expand fuel economy amount

Controlled auto ignition, a combustion process similar to that of a diesel

wavering valve restrict

A variable compression ratio foremost to even better fuel economy and, depending on consumer desires and the variety of function,

A amalgam module with an integrated starter/generator, which makes the transport section even more economical.

When opening and under packed pack, the fuel/air mixture is ignited by a glow socket, as in a conventional glow-ignition engine (homogeneous combustion). The restrictled auto ignition to which the DiesOtto automatically reverts inside its running sequence occurs under unfair pack conditions, i.e. at low and form engine speeds.

The effect is the very low nitrogen oxide releases of homogeneous combustion at cheap response temperatures. All expand releases restrict in the DiesOtto engine is by means of a model three-way catalytic converter. A highly efficient engine management and restrict system has also been realised to mingle the individual sub-systems into a transport notion.

The existing prospects for the future of the inside combustion engine expose its great latent, and show that the new transport notion is a viable proposition in the mid-duration. Some of the indurationediate mixtures incorporated, e.g. direct gasoline injection, are already in string production at Mercedes-Benz. Others will be slowly integrated into string-production engines pending the generally mixture has been realised.

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