Tempi in pista di auto elettriche

[linuc]

e che ne so, se lo avessi saputo non avrei chiesto

[arabykola]

Tesla starts rolling out ?Track Mode? for the Model 3 Performance ? here?s how it works

Fred Lambert


Before even launching the Model 3 Performance, Tesla teased an upcoming ?Track Mode? feature that would enable owners to get more out of the cars in a racing/track environment.

Now Tesla is starting to roll out a new update with ?Track Mode? for the Model 3 Performance, and it explains exactly how it works.

Over the last few months, Tesla has been slowly trickling down information to owners through exclusive test drives with some media.

Tesla claims that they have developed their own in-house vehicle dynamic controls (VDC) system for the first time with the Model 3 Performance version, which is allowing them to develop more advanced driving modes.

Track Mode is the first specific product that it enables and after months of teasing, Tesla says that it is starting to roll it out today in a new update.

The new mode involves a bunch of different aspects from optimized cooling to more powerful regen braking, but the headline-grabbing thing is that it enables drivers to drift their Model 3 Performance vehicles:





WIth the release of the update, Tesla posted a bolg post explaining in more details how the new mode works:

The Tesla Team November 8, 2018

Electric powertrains have numerous advantages over internal combustion engines. In addition to low cost of ownership, energy efficiency, and near silence, they also offer unparalleled responsiveness. Since the introduction of Tesla Roadster in 2008, we?ve exploited the immediate availability of motor power and torque to achieve unprecedented straight-line performance, making the car?s forward acceleration a pure extension of the driver. With Track Mode, which is designed specifically for use on closed autocross circuits and racetracks, our goal was simple: use that same motor power and torque to make cornering on the track feel just as natural as forward acceleration.

The fundamentals

How does motor power help you corner? If you?ve ever pulled a car?s handbrake in an icy parking lot, you know that you can make a car turn with more than just the steering wheel. That?s because torque ? whether accelerating or decelerating a vehicle ? reduces a tire?s ability to hold the car in a turn. Apply torque to the rear wheels, and the car will rotate more in the turn (if you see a car drifting, that?s drive torque; or think about pulling that handbrake, that?s brake torque). Conversely, if you apply either kind of torque to the front wheels, this reduces a car?s ability to turn.

By precisely controlling whether torque goes to the front or the rear wheels, Model 3?s dual motors can immediately and silently increase or decrease the car?s rotation in a corner at your request. This requires lightning fast torque control and the ability for the car to precisely regulate traction on each tire ? both of which are standard features in every Tesla, but that we?ve expanded upon with Track Mode to make highly technical driving effortless.

More than just stability

The most exciting aspect of Track Mode is how we can change the balance of the car using just the motors ? a technique that would typically be interrupted by a system known as stability control.

Stability control is an important safety feature found in all modern passenger vehicles that applies brakes to certain tires in order to prevent your car from spinning out of control during dynamic maneuvers. The feature is designed to make a car?s behavior more predictable in emergency situations, but it also constrains a driver to a limited range of capabilities at the expense of driver authority and fast lap times. As a result, many cars have ?sport? modes that reduce or even disable these safety systems in order to allow a professional driver to maximize the capability of what a car can offer.

Instead of taking away features to enhance the experience of professionals, Track Mode adds features to make any track driver, amateur or professional, feel superhuman on a track. This is possible because with Model 3 Performance, we replaced the stability control system with our own in-house Vehicle Dynamics Controller ? software developed specifically for Tesla vehicles that acts both as a stability control system and also as a performance enhancement on the track.

More features, not fewer

Here is a summary of many of the features we employ with Track Mode while you?re on the track:

• Motor Torque for Rotation Our Vehicle Dynamics Controller constantly monitors the state of the vehicle and all of the inputs from the driver to determine the driver?s intention and affect the rotation of the car in a matter of milliseconds. Track Mode relies heavily on the front and rear motors to control the car?s rotation, and we have the ability to command a 100% torque bias. When cornering, if rotation is insufficient to the driver?s request, the system commands a rear biased torque. Conversely, when rotation is excessive, we command a front biased torque.
• Increased Regenerative Braking Heavy regenerative braking may not be comfortable for day-to-day driving, but on a track, it has several key advantages. It gives the driver more authority with a single pedal, improves the endurance of the braking system, and sends more energy back into the battery, maximizing the battery?s ability to deliver large amounts of power. It also gives the Vehicle Dynamics Controller more authority to create or arrest rotation with the motors when your foot is lifted off of the accelerator pedal.
• Track Focused Powertrain Cooling The high output power required for track driving generates a lot of heat, so endurance on the track requires more aggressive cooling of the powertrain. We proactively drop the temperatures of the battery and the drive units in preparation for the track and continue to cool them down in between drive sessions. We can also allow operation of the powertrain beyond typical thermal limits and increase our refrigerant system capacity by overclocking the AC compressor into higher speed ranges.
• Enhanced Cornering Power We typically think of using brakes to slow down a car, but you can actually use them to make the car faster out of a corner. All Model 3s are equipped with open differentials, which send an equal amount of torque from the motors to both the left and right wheels. When cornering, the wheels on the inside of the corner have less load on them, which means they can provide less tractive force than the outside wheels. To prevent excess slip on this inside tire, we have to limit the torque for both wheels, leaving power on the table. In Track Mode, we simultaneously apply brake and motor torque to produce a net increase in tractive force while cornering. This is similar to how a limited slip differential works, except when using the brakes, the differential can be optimized for various driving conditions.

Model 3 Performance with Track Mode integrates active controls with the vehicle?s already planted chassis and nimble, responsive steering by maximizing the driver?s authority under any condition. We do this with the same secret weapon used for 0-60 mph launches: the two motors that sit on each axle. And like most aspects of a Tesla, we?ll continue to improve and enhance Track Mode over time with future over-the-air updates.

[McRae (Lo Straniero)]

https://www.motortrend.com/cars/tesla/model-3/2019/tesla-model-3-performance-track-mode-release-version-review/

Dopo il test dell'altra volta, hanno affittato il circuito e il tester-pilota, han mandato un ingegnere, una model 3 con pasticche brembo e gomme pi? performanti (e pi? large, 245 invece che le solite 235) per fare dei test e mettere a punto il software. Han tolto 2,5 secondi (da 1:23:90 a 1:21:49). E' un tempo da Ferrari 458 su quel circuito, ha dato 1:29 secondi alla Giulia Quadrifoglio (che monta gomme 285 al retrotreno).

Il tutto con gomme street legal, affinamento del software (che a breve avranno tutti) e gomme migliori (le Pilot sport cup 2s, che monta se non erro la M4). Sono confronti da prendere con le pinze, ma da l'idea dell'ottima base dell'auto che non nasce certo per essere supersportiva, ma come berlina.

[arabykola]

Beh se ho capito bene l avere i 2 motori , e relativi freni/generatori, controllati in un determinato modo, o strategia, diventa un controllo stabilit? sconosciuto alle auto tradizionali

[linuc]

Beh se ho capito bene l avere i 2 motori , e relativi freni/generatori, controllati in un determinato modo, o strategia, diventa un controllo stabilit? sconosciuto alle auto tradizionali

mi sa di si

[arabykola]

Tesla Model 3 Performance sets fastest time at Global Attack event on track mode, gets disqualified for ?being electric?

Fred Lambert


A Tesla Model 3 Performance has made the podium in its first race with track mode at a Global Time Attack Super Lap event in Buttonwillow, but the vehicle was somehow disqualified for ?being electric?.

Cameron Rogers is becoming the defacto Model 3 racing expert.

We previously reported on him racing a standard Model 3 RWD with and without mods at Laguna race track and he did a record lap at the track with his new Model 3 Performance in September.

This weekend, he took his car to the Buttonwillow track for the Global Time Attack Super Lap event.

After a suspension performance upgrade from Mountain Pass Performance, they set out to be first in class in the AWD street tire class.

The new track mode, which Tesla released last week, turned out to be really important since the new race-oriented cooling system enabled them to do many runs and get used to the track without going into a low-power mode to cool the powertrain.

Rogers managed a 2:00.78 time, which was good enough for second-in-class, and the car actually got the best time with a 1:59.12 when driven by Sasha Anis from Mountain Pass Performance ? though he wasn?t officially competing with the car.

Nonetheless, Rogers made the podium with the Model 3 Performance, but his time was contested by a defeated competitor because and I quote: ?electricity is not listed as an approved fuel.?

He was actually taken off the podium during the ceremony as you can see at around 16:00 in the video they did for the event:





You can also see one of the laps that Rogers did in the Model 3 Performance here:



Electrek?s Take

Obviously, it?s not that big of a deal and if anything, it?s funnier than anything else. Everyone except the guy who contested knows that he lost and all it did is give Rogers the opportunity to say you can?t stop the future on stage, which was pretty cool.

As for track mode, I find interesting that the improved cooling for racing is actually the track mode feature that they found most useful.

I look forward to bringing my own Model 3 Performance to the race track after receiving the track mode update. If you have any suggestion in or around Quebec, please let me know.

[arabykola]

https://electrek.co/2018/11/11/tesla-model-3-performance-global-attack-on-track-mode-disqualified-electric/?fbclid=IwAR06arJElmt2nzwV4kRSL4SslTD9LpRqNguxpQj6 _jYufac3jc1o9dHBQ3s



Un paio di video

[Lele-R1-Crash]

Prestazionalmente ? abbastanza ovvio che siano superiori le auto elettriche . Su questo non penso ci sia da discutere .

Una tecnologia sviluppata in un secolo (combustione) ? gi? in crisi con una tecnologia nata da qualche anno ... tra un decennio le auto a combustione faranno ridere .

Per? ste Tesla potevano farle un p? pi? accattivanti come design ... minkia son proprio bruttine

[kanaglia]

ancora non mi arrapano

[McRae (Lo Straniero)]

Per? ste Tesla potevano farle un p? pi? accattivanti come design ... minkia son proprio bruttine

Dai non sono male..

[Lele-R1-Crash]

Questa rossa ? carina ma quella bianca ... ma manco un neolaureato disegnerebbe una linea cosi ! Non mi attizza proprio per niente .

[arabykola]

Pazienza

[Carlito27]

Una tecnologia sviluppata in un secolo (combustione) ? gi? in crisi con una tecnologia nata da qualche anno ... tra un decennio le auto a combustione faranno ridere .

oddio non esageriamo e non confondiamo i motori(elettrici vs combustione) con la tecnologia delle batterie che adesso permette di avere auto elettriche da poter utilizzare quasi come un ICE.
Lo sviluppo dei motori elettrici in questi quasi 2 secoli non ? mica stato fermo, poi giustamente negli ultimi 20 anni c'? stata un'accelerata per l'utilizzo sulle auto.
Ma sono le batterie e il loro thermal management che sono in super evoluzione.
Un motore elettrico ? sempre stato e sempre sar? superiore a un ICE.
Nelle piccole distanze non c'? speranza per un ICE gi? adesso, con questa tecnologia delle batterie, in futuro con le batterie alla stato solido e con lo battery swap ci saranno elettriche alla 24h di lemans.
In F1 ? molto pi? lontana la parit?

[arabykola]

Mac cerca 2 tempi

Nissan unveils new LEAF NISMO RC electric race car with dual motors

Fred Lambert


Under its racing brand Nismo, Nissan unveiled in Tokyo this week a new LEAF-based electric race car with dual motors: the LEAF NISMO RC.

Nissan says that the vehicle is equipped with ?advanced battery technology and drivetrain components from the Nissan LEAF.?

They modified the powertrain to work with dual motors, which is not available on the consumer version of the LEAF.

According to the company, the two electric motors produce 240 kilowatts combined (120 kW each) and 640 Nm of instant torque to the wheels. That?s more than double the maximum power and the torque output of the previous LEAF NISMO RC, which was introduced in 2011 and based on the first generation LEAF.

Nissan writes about the car:

?A new all-wheel-drive system gives the LEAF NISMO RC its outstanding cornering prowess. Power is managed independently to each axle, instantly supplying torque to the tire with the most grip to let the car maneuver quickly and efficiently around the track. Similar to the previous model, chassis weight balance has been optimized by the midship location of the battery pack, with the electric motors and inverters ideally placed over the front and rear tires.?

The Japanese automaker made the LEAF NISMO RC with lightweight components and ?a full carbon-fiber racing monocoque structure, allowing it to tip the scales at just 1,220 kilograms.?

Here?s what they did to the body of the LEAF:

?The car?s three-piece bodywork includes removable front and rear sections, fixed windows, LED headlights and tail lights, and an adjustable rear wing for ideal downforce on the tarmac. The model is slightly longer than its predecessor, with an overall length of 4,546 millimeters and a wheelbase that measures 2,750 millimeters. The Nissan LEAF NISMO RC sits wide and low to the ground, with its wind-cutting form measuring only 1,212 millimeters from roof to roa ? more than 300 millimeters less than the production Nissan LEAF.?

Nissan released a bunch of images of the car, which will officially debut on Dec. 2 at the annual NISMO Festival at Fuji International Speedway:
The company says that the power-to-weight ratio results in ?an impressive performance of zero to 100 kph in just 3.4 seconds ? 50% quicker than the previous model.?

Here?s a quick video of the LEAF NISMO RC:





Executive Vice President Daniele Schillaci, Nissan?s global head of marketing, sales and electric vehicles, commented about the unveiling:

?The all-new LEAF NISMO RC shows how we?re setting our sights even higher when it comes to raw power and performance ? making electric vehicles even more exciting for customers. It?s our most thrilling expression yet of the philosophy of Nissan Intelligent Mobility.?

Nissan says that it plans to only build ?six all-new LEAF NISMO RC vehicles to deploy around the world, so that fans can experience the power and excitement firsthand.?