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RUF eRUF Greenster : 2009

Eexpected to hit the streets in 2010.
Filed under:  Green
 
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The Evolution of the eRUF in Collaboration with their Technology Partner, Siemens Corporate Technology.


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2009 RUF eRUF Greenster.

The research organization of Siemens (Corporate Technology) is working intensively on the topic of electro mobility, which could become part of its environment portfolio, with 19 billion Euros already contributing a mere 25% of total revenue. The demands made on the electric vehicle and the design of the power network infrastructure play a decisive role. Topics being investigated include, among others, energy generation and distribution, traffic and energy management, smart metering, power electronics, software and sensor technology and of course electric drive train systems, and the recovery and storage of energy. Within the scope of this research, Siemens Corporate Technology has developed an integrated system consisting of a motor/generator, power electronics and an interface with a battery connection for electrically powered cars.

The fundamental ideas that led RUF Automobile GmbH to develop an electrically driven vehicle came from Alois Ruf. The head of the automobile manufacturer from the Bavarian town of Pfaffenhausen had a vision of a simple energy transfer concept: his hydroelectric power plants, which feed 35 million kW hours of electricity per annum into the Germany electrical network, could also propel the eRUF. The symbiosis of two leading companies – Siemens as a leader in the electric industry and RUF in the automobile industry - will leverage the best possible synergies for the future of electro mobility.

Siemens Corporate Technology has developed an adapted power train for the eRuf “Greenster”. Thus, a preliminary version of the concept for the innovative eDrive from Siemens will already be on display in Geneva. While the vehicle to be presented in Geneva is still equipped with a central motor with a power output of 270 kW and 950 Nm [Wort gelöscht] torque, the following version will be produced as a small series with Ruf as a double-motor concept with the innovative integral eDrive. As such, the eRUF will be the world's first electric vehicle fitted with a bi-directional network connection, which – without the otherwise necessary additional recharging electronics – is capable to be recharged in less than an hour at a 400-volt power outlet – and can use the same power outlet to feed energy back into the power network if required. The small series planned on the basis of this concept by RUF Automobile is expected to hit the streets in 2010.

(source: RUF)


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2009 RUF eRUF Greenster.

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2009 RUF eRUF Greenster.

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2009 RUF eRUF Greenster.

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2009 RUF eRUF Greenster interior.

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2009 RUF eRUF Greenster interior.

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2009 RUF eRUF Greenster gauge cluster.

Exemplary performance and efficiency: Harman International Automotive Division presents groundbreaking sound technology in the “Greenster” from RUF.
• Infinity® GreenEdge® sound system unites low energy consumption with brilliant sounds to increase safety and enhance the driving experience
• HALOsonicTM- Electronic Sound Synthesis (ESS) uses electronically generated engine

“I swear by the Infinity® loudspeaker system. Ever since the 1980’s, Infinity sound systems have been a permanent fixture in my home and offices,” explains Infinity® fan Alois Ruf, whose renowned car manufacturing business develops and produces the “Greenster”. Thus, the technical components from Harman International were the obvious choice of the specialist for his electric sports car project.

In a project involving close cooperation between engineers and acoustic experts, Harman International has integrated brilliant Infinity® sound in the “Greenster” zero-emissions electric sports car while also achieving maximum energy efficiency. The powerful Infinity® GreenEdge® sound system uses eleven precisely positioned speakers and a powerful amplifier to produce the most intense listening experience possible. Thanks to the electronically generated sounds produced with HALOsonicTM technology, the electric sports car has also been given an acoustic identity of its own. The actively generated sounds are particularly important in increasing safety and also enhance the driving experience.

The “Greenster” sports car from RUF Automobile GmbH really is in a class of its own: instead of a six-cylinder engine, a 270 Kilowatt (367 HP) three-phase motor can be found in the back of the electric sports car, ensuring emissions-free driving. With a top speed of 250 km/h and an acceleration from zero to 100 km/h in around five seconds, the car’s driving performance is sure to please its discerning clientele. An initial small-scale series of the groundbreaking “Greenster” is planned for 2010.

Infinity® GreenEdge® sound system: brilliant sound and energy efficiency Infinity® GreenEdge® elements are characterized by a high degree of energy efficiency. The excellent overall energy balance is achieved through the intelligent linking of reduced weight in all components with a high degree of efficiency in the amplifier and sound transducers. In a move designed to give the sound platform in the “Greenster” a truly unique character, the Infinity® specialists decided on an arrangement of eleven speakers in all. A Kevlar® mid-range speaker is used as the center speaker in the instrument panel. In addition, there are two metal matrix tweeters and two mid-range speakers in the front sections of both door panels, left and right, as well as a powerful carbonfiber woofer in both the driver and front passenger doors. The Infinity® experts installed four more sound transducers in the rear, a tweeter behind both the driver and front passenger seats and two more mid-range speakers connected in parallel. A common feature of the new speaker generation is the Neodymium magnet system, which also helps further reduce the overall weight.

The Infinity® GreenEdge® audio system also has a powerful DSP amplifier under the front passenger seat. The amplifier achieves exemplary efficiency of over 90 percent compared with 35 to 50 percent in conventional models. This efficient use of energy means that almost no waste heat is given off, so that classic cooling can be effectively done away with. Instead, compact lightweight housings are used, which reduce the weight.

Because Harman’s acoustic specialists were entrusted with the development of the audio system at a very early stage of the car’s design, it was possible to calculate the best possible installation position for each speaker and for the amplifier and to adjust these carefully. Every single component of the entire system has been tested over and over again. This has resulted in powerful bass sounds, natural mid tones and crystal-clear top notes.

HALOsonicTM- electronically generated engine sounds increase safety and enhance the driving experience Pioneering HALOsonicTM technology meets many of the key requirements for the future generation of hybrid and electric cars. HALOsonicTM generates synthetic engine sounds, which serve to warn pedestrians and cyclists that the normally almost silent car is approaching. Studies carried out in the University of California have shown that the human ear only perceives hybrid and electric cars within a radius of three meters. Accordingly, critical situations include parking and driving off, as well as emerging from side streets and off-street parking, as people fail to realize that the cars are in motion because there is no engine noise. Older people, people with visual impairment, children and cyclists are the groups at particular risk. A minimum noise level is already being considered in the USA, Japan and Europe, so that the introduction of environmentally friendly, almost silent electric and hybrid cars does not become a new source of danger to other road users.

“Safety is our prime concern, which is why an engine sound must be generated that unmistakably warns other road users that an electric car is approaching and that gives the car a special acoustic identity,” says Alois Ruf. Alois Ruf has purposely chosen a modern engine sound for the exhibition car. The engine noise is transmitted externally by means of two high-efficiency speakers behind the front and back bumpers. The positioning of the speakers required a lot of care and attention because these are continuously exposed to climatic variations, as well as water and dirt.

The sound transducers focus the sound generated by the HALOsonicTM technology in the direction of travel. This means that the noise level remains pleasantly low for other road users who are not located within the direction of travel.

The backward-facing sound transducer also warns passers-by behind the car, who are potentially at risk while “Greenster” is performing reversing or parking maneuvers. HALOsonicTM technology is activated as soon as the driver starts the ignition. This is how the electric sports car signals to other road users that it is about to move off at any moment. For authenticity, the engine sound generated varies with the vehicle speed. This means that pedestrians, cyclists and children can intuitively estimate the direction from which the car is approaching, as well as its speed.

Electronic sound synthesis is also used inside the car, and here too the electronically generated engine sounds ensure safety, while at the same time enhancing the driving experience. The “Greenter’s” specific internal sound is generated by the Infinity® GreenEdge® audio system, offering perfect integration without adding weight or requiring more space.

As well as the modern sound specially generated for the exhibition car, the HALOsonicTM technology can also be used to simulate other electronically generated engine noises. This means, for example, that fans of the six-cylinder Boxer engine can choose a sporty sound that emulates the original.

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2010 RUF eRUF Greenster interior.

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Ruf logo.

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LINKS
Ruf   Official site.
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