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I compared a 2019 Model 3 to a BMW i3, Chevy Bolt, and a Nissan Leaf (as well as a fair number of ICE cars like subarus, bmw 335, VW Golf R). I did notice that

by sliken 5y ago

I compared a 2019 Model 3 to a BMW i3, Chevy Bolt, and a Nissan Leaf (as well as a fair number of ICE cars like subarus, bmw 335, VW Golf R). I did notice that the entertainment system/nav/music, etc where worlds apart. The Tesla felt like a current smartphone, pinch/zoom, fast UI, easy to use, and pretty good speech recognition. The others felt like 5-10 year old phones, similar in feeling to even my ancient nokia 770 with Maemo mapper. Monroe (on youtube) did a breakdown and said that the only other place he say CPU/ASIC/Sensor integration like on the model 3 was in satellites. Apparently there's a large CPU with a ton of pins that handles quite a bit of cars needs. Even the usually Bosche supplied ABS/Stability management/traction control functionality has been merged into the Tesla chip.

bonestamp2 5y ago
> Even the usually Bosche supplied ABS/Stability management/traction control functionality has been merged into the Tesla chip. That's interesting... that's usually it's own ECU on most cars.
- mywittyname 5y ago
  I can see why they might do it this way. ABS/SC in ICE cars tend to focus mostly on the braking system. Since most ICE cars are two-wheel drive with an open differential, there's not much that can be done from a stability point of view besides cutting power. Even AWD cars with computer-controlled differentials have response times that are too long to really be of much use in an emergency situation. EVs, OTOH, can apply or reduce torque to the wheels much faster than even the brakes can respond. And being able to not only apply stopping force to a wheel, but also apply torque to another wheel makes for a totally different approach to stability management.
  - 11thEarlOfMar 5y ago
    Here's an interesting anecdote: Tesla cars have traction control that monitors the differential in rotation speed among the four tires. If you put new tires on the rear and leave worn tires on the front, the rotation differential between the inside rear and outside front on a tight curve is enough to fool the traction control into thinking the worn front tire is slipping and will pulse the brakes on that wheel only. It's pretty unnerving. Put new tires on the front and the problem is solved.
    - Unklejoe 5y ago
      This happens on my BMW too (2011 3 series). I’ve also had traction/stability control activate when hitting a large bump due to the slight change in wheel speed as each wheel goes over it.
deleted 5y ago
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by sliken 5y ago

bonestamp2 5y ago

> Even the usually Bosche supplied ABS/Stability management/traction control functionality has been merged into the Tesla chip. That's interesting... that's usually it's own ECU on most cars.

mywittyname 5y ago
I can see why they might do it this way. ABS/SC in ICE cars tend to focus mostly on the braking system. Since most ICE cars are two-wheel drive with an open differential, there's not much that can be done from a stability point of view besides cutting power. Even AWD cars with computer-controlled differentials have response times that are too long to really be of much use in an emergency situation. EVs, OTOH, can apply or reduce torque to the wheels much faster than even the brakes can respond. And being able to not only apply stopping force to a wheel, but also apply torque to another wheel makes for a totally different approach to stability management.
- 11thEarlOfMar 5y ago
  Here's an interesting anecdote: Tesla cars have traction control that monitors the differential in rotation speed among the four tires. If you put new tires on the rear and leave worn tires on the front, the rotation differential between the inside rear and outside front on a tight curve is enough to fool the traction control into thinking the worn front tire is slipping and will pulse the brakes on that wheel only. It's pretty unnerving. Put new tires on the front and the problem is solved.
  - Unklejoe 5y ago
    This happens on my BMW too (2011 3 series). I’ve also had traction/stability control activate when hitting a large bump due to the slight change in wheel speed as each wheel goes over it.

deleted 5y ago

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