Agreed, that's easily understandable (though that's always a subjective thing... )
Buying an EV is one thing, being able to drive it beyond city limits another...
Tesla's letter to NHSTA, the car should immediately start slowing.
I assume when they say "brake pedal is pressed after the accelerator," that covers your test of holding the accelerator down while subsequently and simultaneously pressing the brake with your other foot. Seems like it is not working the way the said it would. Is it possible you let up on the accelerator, pressed the brake, and then re-pressed down on the accelerator?[T]he Model S is equipped with brake override where the controller gives priority to brake pedal input over accelerator input. If the brake pedal is pressed after the accelerator, the controller will ignore the accelerator inputs and respond only to the brake signal.
I'm guessing the following
Tesla's letter goes on to give two other options to deal with a runaway vehicle. Might be interesting to see if these work as advertised on a test drive. Check with your Tesla minder first, though.
I presume that in the latter case (park brake pressed), it also removes torque from the motor.In addition, the Model S transmission is designed to allow shifting from drive or reverse into neutral while the vehicle is in motion. Shifting from drive or reverse into neutral will remove torque from the motor. Finally, all Model S vehicles will be equipped with a park brake capable of dynamic application. When the park brake button on the center screen is depressed, regardless of vehicle speed, the brake is applied slowing the vehicle.
Mods: maybe this should get its own thread, since it's a pretty serious safety issue.
Last edited by favo; 08-01-2012 at 05:19 PM.
Curious if you already own a Volt, or are simply considering it as an alternative to the Model S? We brought my wife's Volt to my test drive of Model S on Saturday, and see the 2 cars as very much complementary of one another for our needs. Will be nice to have 2 cars capable of short range electric driving, Model S for mid-range electric, and the Volt's ICE generator for very long trips. My wife tends to drive more conservatively, and does not require the added performance of Model S. Still, both of us were wowed (even giddy) from test driving Model S in comparison to the Volt--and by things you noticed--differences in acceleration, smoothness with the air suspension, the lower center of gravity on curves all lead to a far superior driving experience when compared against what is an already a superior experience in the Volt. I commented that Model S was like the Volt on steroids. My wife also found the roller-coaster-like experience of Model S to be far superior. Running the course in both the Volt and the Model S only helped to cement those views. On top of the performance differences, the opportunity to have a pure electric car, with the huge screen, panoramic roof, and much greater electric range easily make the value proposition of Model S understandable in my eyes. The ability of Model S to use the HD backup camera when moving forward helps address concerns with rear visibility. Many of the minor flaws that people see in Model S are far too small to keep me from wanting the car when the total package is considered. Tesla could still address many of those issues before we take ownership (or later via firmware updates, upgrades at annual service, etc.). My main remaining concern is the potential cost of service rangers for annual mantenance living in a smaller market and/or the logistics of making the long drive to the nearest service location. If you prefer a smaller car and really like the Volt, then perhaps the Volt is right for you, or perhaps a Volt lease followed by a Tesla Gen III purchase. It's great to see US automakers providing us with these superior models at this time.
I haven't had the pleasure of a test drive. I very much look forward to getting the chance to compare the two, as those will be our two cars.
I agree with the previous poster that mentions they compliment each other very nicely.
Truly Electric Spaceship-Like Adventure ~ Signature Model Spaceship
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Yep, tested that while in D. Any movement of the stalk makes it go to N, and it will not go to R while moving forward.Shifting from drive or reverse into neutral will remove torque from the motor.
I am not excited about using the parking brake as mitigation. If you are going 125 mph, are you really going to take your eyes off the road to search through the menus to find the parking brake touchon on the centre screen? And, if 4 large sets of brakes could not slow the car significantly, how will 2 small sets do any better? Unless, as you say, it also cuts motor torque.I presume that in the latter case (park brake pressed), it also removes torque from the motor.
I don't think we should make too much of it until after I hear back from Tesla Engineering. The way I see it, the behaviour can be changed easily through an OTA software update - it is not a difficult to fix, recall inducing design flaw.Mods: maybe this should get its own thread, since it's a pretty serious safety issue.
I absolutely agree. The Model S is intended to replace a Prius, and eventually a Bluestar/Gen III will replace the Volt. If family came to visit more often (they think the Twin Cities are too boring), or if we had children (unfortunately we don't), or if either of us had to make frequent trips longer than 50 miles, the Model S would've been a no-brainer. Absent that, I was hoping for something more spectacular about the driving experience to convince me to part with my money.We … see the 2 cars as very much complementary of one another for our needs. ...and much greater electric range easily make the value proposition of Model S understandable in my eyes.
Model S, P8244 - waiting for v2.0
Yeah, clearly not a first option, but redundancy is good.I am not excited about using the parking brake as mitigation. If you are going 125 mph, are you really going to take your eyes off the road to search through the menus to find the parking brake touchon on the centre screen? And, if 4 large sets of brakes could not slow the car significantly, how will 2 small sets do any better? Unless, as you say, it also cuts motor torque.
I'll be interested to hear the response. Thanks for following up.I don't think we should make too much of it until after I hear back from Tesla Engineering. The way I see it, the behaviour can be changed easily through an OTA software update - it is not a difficult to fix, recall inducing design flaw.
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