11 ms·

The lack of information on how it /feels/ is telling. Feedback is important for safe driving.

jedmeyers 2y ago
It feels like you are pressing on a tennis ball, zero real feedback whatsoever. Acura MDX has had the brake-by-wire system fo a while now in the latest generation.
LeafItAlone 2y ago
Possibly because that’s not the job of that parts being talked about. The brake pedal implementation will have to be separate and each brake pedal manufacturer can implement a different style. One could even see the possibility that different drivers get different response customization, like how many new cars let you save custom seat, mirror, and driving style configurations.
- flyingfences 2y ago
  That is not the point at all; We're not talking about a spring rate that increases as you push on the pedal. In a proper braking system, the driver can feel through his foot what the tires are doing, because there is direct mechanical feedback through the brake lines. This is an important safety consideration, and manufacturers are throwing it out for... what?
  - LeafItAlone 2y ago
    Yes, and those can all be mechanically emulated at the pedal based on sensors on the brakes, with only an electrical connection between them. You can experience that even on modern arcade racing-simulator games.
jauntywundrkind 2y ago
Younger me thought drive-by-wire was awesome. But now I'm aghast at all these systems. Because of feedback. Because yiu no longer have the tactile data to form a understanding & relationship with your 1.5 tons of rolling metal. Digitization strips of affordances that mechanical naturally provides, leaves us adrift in at best simulation of response. The threads here seem dominated by questions like how reliable will this be (probably quite), how much weight will this save (not a lot, but it enables design flexibility). Feedback though... That's really the key thing most users are going to experience as different. And it seems so unlikely that the user will have anywhere near as much accurate timely feedback as the mechanical systems it's designed to replace. Even if initial models may layer in a variety of sensors to simulate feedback, it seems likely to be reduced over time, to be cost-downed.

It feels like you are pressing on a tennis ball, zero real feedback whatsoever. Acura MDX has had the brake-by-wire system fo a while now in the latest generation.

LeafItAlone 2y ago

Possibly because that’s not the job of that parts being talked about. The brake pedal implementation will have to be separate and each brake pedal manufacturer can implement a different style. One could even see the possibility that different drivers get different response customization, like how many new cars let you save custom seat, mirror, and driving style configurations.

flyingfences 2y ago
That is not the point at all; We're not talking about a spring rate that increases as you push on the pedal. In a proper braking system, the driver can feel through his foot what the tires are doing, because there is direct mechanical feedback through the brake lines. This is an important safety consideration, and manufacturers are throwing it out for... what?
- LeafItAlone 2y ago
  Yes, and those can all be mechanically emulated at the pedal based on sensors on the brakes, with only an electrical connection between them. You can experience that even on modern arcade racing-simulator games.

jauntywundrkind 2y ago

Younger me thought drive-by-wire was awesome. But now I'm aghast at all these systems. Because of feedback. Because yiu no longer have the tactile data to form a understanding & relationship with your 1.5 tons of rolling metal. Digitization strips of affordances that mechanical naturally provides, leaves us adrift in at best simulation of response. The threads here seem dominated by questions like how reliable will this be (probably quite), how much weight will this save (not a lot, but it enables design flexibility). Feedback though... That's really the key thing most users are going to experience as different. And it seems so unlikely that the user will have anywhere near as much accurate timely feedback as the mechanical systems it's designed to replace. Even if initial models may layer in a variety of sensors to simulate feedback, it seems likely to be reduced over time, to be cost-downed.