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Is the Tesla Model S Pedal Placement A Safety Hazard?
cartechboy (2660665) writes "When things go wrong with the Tesla Model S electric car, its very loyal--and opinionated--owners usually speak up. And that's just what David Noland has done. An incident in which his Model S didn't stop when he pressed the brake pedal scared him--and got him investigating. He measured pedal spacing on 22 different new cars at dealers--and his analysis suggests that the Tesla pedal setup may be causing what aviation analysts call a 'design-induced pilot error'. And pedal design, as Toyota just learned to the tune of $1.2 billion, is very important indeed in preventing accidents."
Size 13 winter boots. Brake pedal and gas aren't "as far" apart as other cars.
User Error != Manufacturer Defect
Hey look, some idiot hit the gas pedal instead of the brake pedal and it's "news" because it was a Tesla.
It needs a big red shiny button on the dash! It'll simultaneously apply the brakes, eject the battery pack, contact your insurance agent to file a claim, call your lawyer to sue Tesla and deploy the fire extinguishers. Not necessarily in that order.
Harrison's Postulate - "For every action there is an equal and opposite criticism"
Guy cannot drive and trashes expensive car, blames manufacturer.
News at 11.
PS: Apparently, "The Model S accelerator pedal is disabled if you press the accelerator pedal and brake pedal simultaneously."
Before posting crap like this for the love of god at least consider the difference in number between the most popular car on the road and a super expensive specialty vehicle that very few people own. Somehow I am not surprised that with only 25,000 cars on the road there are less reports of problems with the tesla than there are with the 3.2 million prius' sold world wide.
Obviously its just a conspiracy and also there is clearly no way that anyone at tesla could ever make a poor design decision.
"In America, first you get the sugar, then you get the power, then you get the women..." -H. Simpson
Toyota's fine was not just about sticking pedals (and initially making deceptive statements about the safety of those pedals). Toyota's fine was in part for claiming that sticking pedals were the sole cause of unintended acceleration when in fact multiple defects in Toyota’s engine software directly caused at least one (decided by a jury) other crash.
An Update on Toyota and Unintended Acceleration Barr Code
U.S. Fines Toyota $1.2 Billion but Defers Criminal Prosecution Over Vehicle Safety Deceit - IEEE Spectrum
This is an important safety (and technology) issue that has flown mostly under the radar. I believe that is in part because journalists and the public believe they got their answer years ago, when in fact new evidence, expert testimony, and court verdicts have come to light. I think the issue is important enough that this misconception should be corrected whenever it's reported.
My opinion, not my employer's.
O agree, and on an unrelated note, O would loke the standard QWERTY keybaord redesogned so that the letters O "eye" and O "Oh" are not placed so close together. Thor current placement causes me far too many typong errors
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Is this the same bullshit that almost made Audi pull out of the US? It looks like it.
The bullshit was Audi blaming the customers for confusing the pedals. The fault was elsewhere. I know - I owned an Audi 5000T that did this.
I was driving on an interstate highway on cruise control - my feet were not touching the pedals. The car suddenly went to full throttle. I could move the throttle pedal up and down with my foot. The brake pedal would not budge. I shut off the cruise control via a dashboard switch, and regained control. After the turbo boost dropped below atmospheric pressure, I regained brakes. I later discovered the check valve on the vacuum assist was worn, causing the loss of brakes when the turbo was on boost. The throttle issue was clearly the cruise control malfunction. It never did it again. I could not duplicate the fault, so I suspect poor RF shielding (trucker using a hopped up CB radio?).
I contacted Audi, and they blew me off.
To their credit, they stopped using the check valve method, so someone at Audi understood the fault condition. I'm less sure about the other issue. I solved the problem by deciding never to buy another Audi.
Place nail here >+
As you may know, if you spin an electric motor by putting a prop on it and letting the wind spin it, you've just made a generator. You may also know that doesn't mean that the spin a motor powers itself, forming a perpetual motion machine. That's because the generated voltage is in the reverse direction from the direction required to make it spin (among other things).
So what happens is that when you apply 12 volts to make a motor turn, that "generator effect" is producing 6 volts the other direction. If you put a multimeter on the motor terminals, it'll read 12V - 6V = 6V. So the spinning motor has 6V at its terminals. If it's not spinning, it doesn't work as a generator, so it has 12V on terminals. Guess which one has more torque, the stalled motor with 12V or the spinning motor with 6V? The motor with the full 12V (because it's not generating -6V) has more torque. Max torque, therefore, is at 0 RPM. Faster spinning means more negative voltage generated and lower torque.
A manufacturer of the control circuit can of course ARTIFICIALLY limit the power to the motor at low RPM. If they set the control circuit to not ALLOW the motor to full torque, the car would see consistent torque. That's not because of the motor, though, that would be an artificial limit configured into the controller.
I thoroughly disagree. As a UX designer, I consider my design "in need of improvement" if it's designed such that it's easy to make specific, known errors. A few hours ago I was on the phone with a customer who uses my Strongbox software. He was making the same error that many other people make. That many people make the error proves to me that the software doesn't make it sufficiently obvious what the correct action is.
about when you've been in sometime else's car at night. Often you have to hunt for the door lever and especially on older cars you have to figure out if the handle should be rotated upward, pulled out and back, out and forward, etc. Doors on buildings often have instructions posted on them - Push or Pull. Other buildings don't need instructions - the door has a flat metal plate that can only be pushed. It can't be pulled or turned, it's a flat plate. Emergency exits get it right - a wide, flat bar is obviously for pushing. Some doors, like one I sawlast week, get it ENTIRELY wrong - that one had a round knob - which needed to be SLID to the side. Round knobs are for turning! Vertical slits or projections are for sliding to the side. Not surprisingly, I saw two different people struggle with that door until someone helped them.
We talked about the handles inside of cars. Contrast that with the handles on the outside of a car door. That's a good design. Noone will ever need help figuring out how to operate an exterior car door handle because the design is such that the user can only do one thing - insert fingers and pull.
I seek to make my designs be like exterior car handles - intuitively obvious. With the right design, not only do users not make errors, they aren't even distracted by looking at the UX, figuring it out. They just do it automatically, intuitively, like opening the door to get into a car.
Credit to The Design of Everyday Things for the door handle example.