918 RSR: Hybrid without the most powerful battery in the world!

[Christophe]

... well I think ... but it is especially the absence of battery that intrigues: we are talking about a "rotating" accumulator which stores electricity? Level look, Hollywood would not do better ...

Porsche 918 RSR: Tremble, poor mortals!

(...)

From a technical point of view

Under the hood, this 918 RSR takes the V8 from the 918 Spyder concept. Same digital identification, same mill. At Porsche, logic is essential. The efficiency too: with a displacement of 3.4 l, this engine displays its 563 horsepower at 10.300 rpm! An already colossal power, but embellished by two electric motors housed in the front wheels and which add 150 kW to the total. This gives us 767 horses! A pretty power. No lithium-ion battery pack in the area, but a rotary accumulator which accumulates electrical energy to force it back! Ingenious, efficient, but it boycots the place of the co-pilot!

A little Gulf side?

From a stylistic point of view, the 918 RSR carries the colors of the victorious 917 at Le Mans 1971. Even the number, the legendary "22", refers to it! As for the sensual and sporty lines, they remind us that elegance and aerodynamic efficiency can go hand in hand.

I think the mechanical accumulator is this:



Crazy ... it deserves further study!
Could it be an inertial accumulator?

Source: http://www.vroom.be/fr/actualite-auto/8 ... 8-rsr.html

[Alain G]

This flywheel accumulator is an electric motor whose rotor rotates at up to 36,000 rpm to store rotation energy. Charging occurs when the two electric motors on the front axle reverse their function during braking processes and operate as generators. At the push of a button, the pilot is able to call up the energy stored in the charged flywheel accumulator and use it during acceleration or overtaking maneuvers. The flywheel is braked electromagnetically in this case in order to additionally supply up to 2 x 75 kW, ie a total of 150 kW, from its kinetic energy to the two electric motors on the front axle.

Nothing found on the flywheel, even on the porsche site!

[PITMIX]

Hello
It can be a big dinamo which transmits the juice live and with inertia, like on certain toys. When will the porsche with elastic motor.

[Christophe]

More and more strange!

Pitmix do you think there are EPO-doped hamsters in it?

This flywheel accumulator is an electric motor whose rotor rotates at up to 36,000 rpm to store rotation energy

Well if you found it, this description looks like inertial storage ...

I wonder how many kJ it can store ...

The F1 SRECs stored 400 kJ. It only lasted one season, but that allowed I think to make changes in the field.

According to wiki: http://fr.wikipedia.org/wiki/Srec

The system was used in Formula 1 during the 2009 season. The SREC allows energy recovery during braking, which drivers can reuse later (400 kJ maximum per lap) by pushing a button, triggering an additional influx 80 horsepower for 6,67 seconds (or 40 horsepower for 13 seconds) in the acceleration phases [3].

The 400 kJ that the SREC delivers each round represents the petrol equivalent of 0,021 liters, or 1,47 liters per Grand Prix [4]. Due to its high mass handicapping the general balance of single-seaters, the prohibitive cost of its development and its poor performance on the majority of circuits used in the world championship, most of the teams gave up using it or continuing its development during the season. Only the Ferrari and McLaren teams have used the system for the entire season.

And further, the answer on energy:

The German manufacturer Porsche will present a Porsche 911 GT3 of hybrid competition at the Geneva Motor Show 2010, this on board, in addition to its internal combustion engine, two electric motors of 60 kW each, powered by a flywheel capable of turn at 40 rpm during the braking phases. The system could provide up to 000 additional hp for periods of 164 to 6 seconds[11]. The technology was developed by the British Williams Hybrid Power [12], partner of the Williams F1 Formula 1 team. The car will be entered to compete in the 24 hours of the 2010 Nürburgring [11].

164 hp for 6 to 8 seconds this makes an energy of:

164 * 740 * 7 = 850 kJ

Be careful, it is the energy "at the wheel" it must therefore be corrected by the respective yields, generator + motor or say 70% ...

We would therefore have approximately 850 / 0.7 = 1 kJ or 200 kWh or the equivalent of 0.33 / 0.03 = 0.25 L of gasoline (engine efficiency 0.13%)

[quartz]

Hello everybody

Some info here, and there, but not much, flywheel magnetically drive they do not say electromagnetically.

[dedeleco]

PITMIX doubtful:

When will the porsche with elastic motor.

if modernized, it is as interesting as compressed air, and too despised !!!!!
Otherwise, completely different, unrelated, the flywheel, or energy storage in a flywheel, stands very seriously, limited by the resistance of materials to centrifugal force, and therefore great progress with carbon fibers;
http://en.wikipedia.org/wiki/Flywheel
http://en.wikipedia.org/wiki/Flywheel_energy_storage
http://fr.wikipedia.org/wiki/Volant_d%27inertie
http://de.wikipedia.org/wiki/Schwungrad
http://www.vyconenergy.com/pq/VDCtech.htm
http://www.vyconenergy.com/pq/pages_pq/pqprod.htm
above all, they are aimed at an instantaneous boost power in regenerative braking or in a huge engine, on short time.
In total stored energy, we arrive at 4KWh / 100Kg
http://en.wikipedia.org/wiki/Flywheel

Finally, we live on a beautiful long-time flywheel: the earth that has been rotating for 4 billion years by giving his energy to move the moon away and to stir the tides !!

Finally, we can store the energy in the rotation of electrons in superconducting coils or rings:
http://fr.wikipedia.org/wiki/SMES
http://en.wikipedia.org/wiki/Supercondu ... gy_storage
and we are looking for the miracle of a superconductor at ordinary temperature.

[vinzman]

For those who want to see what it looks like:

http://www.youtube.com/watch?v=AW7lstH1TgY



ps: sorry if this link is already out

[Christophe]

No, we hadn't put it on yet.

Speaking of a Porsche video, tonight on Arte there was:

Porsche against Volkswagen; The fratricidal duel

For more than three years, the twists and turns of the Porsche-Volkswagen saga have held business circles and public opinion in suspense. Started with the thunderous announcement of the takeover of Volkswagen by Porsche, this stormy story also unfolds against the backdrop of a family dispute. Because Wolfgang Porsche, chairman of the supervisory board of Porsche, and Ferdinand Piëch, his counterpart at Volkswagen, are first cousins. Ferry Porsche, the father of the first, and Louise Piëch, the mother of the second, were the two children of Ferdinand Porsche, inventor of the "Beetle" and founder of the Volkswagen company in 1936. After the death of the patriarch, in the years 1960, Louise's son, Ferdinand, joins Porsche. A young engineer full of ambition, he develops ultra-fast but expensive sports cars, and worries his uncle Ferry. Forced to leave the company, he joined Audi, a subsidiary of the Volkswagen group, a few years later. Tensions are at their highest when Porsche, in 2007, launches a takeover bid for Volkswagen, of which it becomes the owner in early 2009. The summer of 2009 will however bring a spectacular turnaround, with the reconciliation of the clans and a merger project. Will the Volkswagen group definitely take back control in 2011 as it hopes?

A review here: http://videos.arte.tv/fr/videos/porsche ... 31858.html

http://www.arte.tv/fr/Comprendre-le-mon ... 68068.html

[quartz]

Hello everybody

here a pdf document which deals with the development aspect of the system for armed vehicles.