Official Tesla Model 3 thread
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cwerdna
Well-known member
LOL.EVDRIVER said:
I first learned of it via CNBC. I didn't have a CNBC link handy at the time: https://www.cnbc.com/2018/10/26/tesla-faces-criminal-probe-over-allegedly-misstating-production-numbers-and-misleading-investors-wsj.html. However, CNBC points back to WSJ.
cwerdna
Well-known member
Hilarious. Not to me. Would you lump Bloomberg in there, as well?EVDRIVER said:
Seeking Alpha and Zero Hedge are full of anti-Tesla FUD.... On the other end, Electrek is a Tesla fanboy site.
Oils4AsphaultOnly
Well-known member
cwerdna said:
in case you haven't noticed, they all sourced from a wall street journal article that references info that's a few months old. the article was delivered and disseminated in the middle of market trading on friday to stop the SP from rising too far. there has been no new requests for info: https://ktla.com/2018/10/26/fbi-probe-looking-into-whether-tesla-overestimated-production-numbers-to-mislead-investors/
"He said the company cooperated with a “voluntary request” for documents from the Justice Department earlier this year and has received no additional requests on the matter for months."
evnow
Well-known member
There is literally Billions of $ on the line.drees said:
Media is either co-conspiring with big shorts - or they are being useful idiots.
SEC folks, Hedge fund managers and media go around in the same cocktail circuits. SEC and Media won't go after big shorts. Much easier to vilify far off wes coast companies.
jlv
Well-known member
I heard they changed their name.drees said:
scottf200
Well-known member
Changes to regen seem to be for RWD vehicles only as AWD regen was pretty high.
Oils4AsphaultOnly
Well-known member
OMG the new regenerative braking is butter smooth! It's like chill-mode, but with full access to standard acceleration. It's the little things that keep improving that I like about the company.
Oils4AsphaultOnly
Well-known member
GRA said:
I've been meaning to follow-up on this. Now that Tesla has demonstrated that the company can be profitable, is it really so strange to believe that they'll sell the SR at all?
cwerdna
Well-known member
Tesla Model 3 Mid Range Deliveries Pushed Up To Get Full Tax Credit
https://insideevs.com/tesla-model-3-mid-range-deliveries-tax-credit/
https://insideevs.com/tesla-model-3-mid-range-deliveries-tax-credit/
GRA
Well-known member
They've yet to demonstrate that they can be consistently profitable, or that the Model 3SR can be sold at a profit, nor do we know what will happen to sales of their less expensive models once the credits start to reduce. In addition, even if sales don't fall off when the tax credits end, as yet it seems highly unlikely they're in a condition to sell a loss leader in volume and still make a profit, so the answer remains 'we'll see'.Oils4AsphaultOnly said:
scottf200
Well-known member
While this is about the Tesla Model 3 performance it highlights the advantages of electric cars in general and level of controls in the drivetrain.
[youtube]http://www.youtube.com/watch?v=XJu8PJO_Xd4[/youtube]
How Track Mode Works
The Tesla Team 8 November, 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.
https://www.tesla.com/en_AU/blog/how-track-mode-works?redirect=no
https://electrek.co/2018/11/08/tesla-track-mode-model-3-performance-how/
https://www.motorauthority.com/news/1119825_tesla-model-3-performance-adds-track-mode-system-detailed
[youtube]http://www.youtube.com/watch?v=XJu8PJO_Xd4[/youtube]
How Track Mode Works
The Tesla Team 8 November, 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.
https://www.tesla.com/en_AU/blog/how-track-mode-works?redirect=no
https://electrek.co/2018/11/08/tesla-track-mode-model-3-performance-how/
https://www.motorauthority.com/news/1119825_tesla-model-3-performance-adds-track-mode-system-detailed
Oils4AsphaultOnly
Well-known member
to add to scottf200's post.
From Motor Trend's test of the release version of Track Mode: https://www.motortrend.com/cars/tesla/model-3/2019/tesla-model-3-performance-track-mode-release-version-review/
1.29 seconds faster than the alpha romeo giulia they lost to last month!
From Motor Trend's test of the release version of Track Mode: https://www.motortrend.com/cars/tesla/model-3/2019/tesla-model-3-performance-track-mode-release-version-review/
1.29 seconds faster than the alpha romeo giulia they lost to last month!
scottf200
Well-known member
Great find with that article.Oils4AsphaultOnly said:
That video in the MotorTrend article was GREAT. It talked about/showed standard mode vs track mode.
GRA
Well-known member
dgpcolorado
Well-known member
That seems odd since the car can't know what tires are on it. I would guess that it is due to reduced regen because of a cold battery, something that I have been expecting to surprise first time EV drivers in cold weather areas. The power/regen meter on the Model 3 is very subtle compared to the one in the Model S and X. It is a line and limited power or regen is indicated by dots instead of the usual line. You would have to know what those dots represent to realize that regen is limited.GRA said:
GRA
Well-known member
That seems to have been eliminated as the cause, judging by the thread on TMC: https://teslamotorsclub.com/tmc/threads/who-has-lost-regen-with-winter-tires.133003/dgpcolorado said:
From the first post in that thread:
