4 ms·

The value is not having to put mechanical linkage all the way to the back. I'd think if it would be cheaper to leave it manual they would. But I'm appalled at

The value is not having to put mechanical linkage all the way to the back. I'd think if it would be cheaper to leave it manual they would. But I'm appalled at more and more choices that make cars more error-prone in emergency. I'd never want brake by wire car. Even if the mechanical reliability would be the same, one coding error and brakes are gone

potato3732842 1y ago
They're not worried about a $20+installation cable that they can copy-paste from the last car. An EV "needs" the electric actuator to replicate the park position in a conventional automatic transmission. The motor has no mechanical brake so the parking brake is automatically applied via software. Once you can do that why run the cable? There's som minor addition value in sharing the system with ICE models that don't need it and programming them to cycle the system from time to time so that they don't rust up and stop working like cables are inclined to in automatic equipped cars.
- giantg2 1y ago
  "Once you can do that why run the cable?" In case of electronic/hydraulic failure when driving. If you want to replace the park position of a transmission, then they should do that with something that actually mimics that. You could use a sprocket and pawl on the motor output shaft.
- rootusrootus 1y ago
  Some EVs, not all. My Lightning has a parking pawl.
- userbinator 1y ago
  An EV "needs" the electric actuator to replicate the park position in a conventional automatic transmission. Noteworthy fact: most early automatic transmissions had no park position. Like a manual, you put them in neutral and set the parking brake instead.
giantg2 1y ago
I find it hard to believe that running an electric cable to motor/actuator and programming the computer to use it via a button is cheaper than running a cable attached to a lever.
- Tempest1981 1y ago
  Cables do stretch and rust
  - giantg2 1y ago
    And motors/actuators wear out and can rust too. A cable is still much cheaper.
dzhiurgis 1y ago
> I'd never want brake by wire car. I'm willing to bet in just 5 years fully break-by-wire systems (aka no hydraulics) will be 2x more reliable.

potato3732842 1y ago

They're not worried about a $20+installation cable that they can copy-paste from the last car. An EV "needs" the electric actuator to replicate the park position in a conventional automatic transmission. The motor has no mechanical brake so the parking brake is automatically applied via software. Once you can do that why run the cable? There's som minor addition value in sharing the system with ICE models that don't need it and programming them to cycle the system from time to time so that they don't rust up and stop working like cables are inclined to in automatic equipped cars.

giantg2 1y ago
"Once you can do that why run the cable?" In case of electronic/hydraulic failure when driving. If you want to replace the park position of a transmission, then they should do that with something that actually mimics that. You could use a sprocket and pawl on the motor output shaft.
rootusrootus 1y ago
Some EVs, not all. My Lightning has a parking pawl.
userbinator 1y ago
An EV "needs" the electric actuator to replicate the park position in a conventional automatic transmission. Noteworthy fact: most early automatic transmissions had no park position. Like a manual, you put them in neutral and set the parking brake instead.

giantg2 1y ago

I find it hard to believe that running an electric cable to motor/actuator and programming the computer to use it via a button is cheaper than running a cable attached to a lever.

Tempest1981 1y ago
Cables do stretch and rust
- giantg2 1y ago
  And motors/actuators wear out and can rust too. A cable is still much cheaper.

dzhiurgis 1y ago

> I'd never want brake by wire car. I'm willing to bet in just 5 years fully break-by-wire systems (aka no hydraulics) will be 2x more reliable.