The awesome Mercedes-Benz F 700 Research Car
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Image Gallery ( 29 images )Mercedes-Benz is convinced that in the coming years, internal combustion engines will remain the dominant type of drive in automobiles – albeit appreciably improved in all dimensions. Depending on operating conditions and use profile, supplementing it with a hybrid module can be a sensible step. Mercedes-Benz offers a wide array of gasoline and diesel engines which can be complemented with different hybrid modules in the near future. So depending on field of use and personal preferences, every customer can select the drive which is the optimum for his or her purposes.
Until now gasoline and diesel engines have had clearly distributed roles: the diesel was more economical, but emission control was easier to manage in the gasoline-powered car. “Our strategic objective is to make the gasoline-powered car as economical as the diesel, and the diesel as clean as the gasoline engine,” says Dr. Thomas Weber, Board member of DaimlerChrysler AG responsible for Group Research & Mercedes Car Group Development. One part of this strategy already has been implemented: the BLUETEC technology, which reduces nitrogen oxide emissions, gives the diesel engine the capacity to comply even with the world’s harshest emission standards – including those to come in future. BLUETEC is already on the market in the USA and will be available in Europe from the end of 2007.
“Researchers and developers need challenges and great goals,” says Dr. Thomas Weber. “For this reason we think much farther ahead at Mercedes-Benz: we are going to combine the strengths and advantages of both combustion principles in one innovative engine concept. The DIESOTTO drive is a major step forward.”
Unique system for reducing consumption
The DIESOTTO drive in the new research car is a unique, integrated system for consumption reduction. It involves • downsizing by reducing cylinder size and smaller displacement; • turbocharging; • direct gasoline injection; • variable valve control; • controlled auto ignition (CAI); • hybrid module with integral starter-generator.
DIESOTTO brings the benefits of diesel technology to the gasoline engine: in the CAI mode the air-fuel mixture ignites itself the same as in a diesel engine. And yet DIESOTTO makes no special demands on fuel quality: the engine runs on normal gasoline.
Controlled auto ignition, moreover, not only is more economical than the conventional combustion triggered by a sparkplug, it is also cleaner as regards emissions. In controlled auto ignition, as the Mercedes-Benz engineers term their new process, hardly any nitrogen oxides (NOx) are produced. DIESOTTO thus points to the future of the gasoline engine – a future imagined, researched and developed by Mercedes-Benz.
Two-stage charging and hybrid module
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