4 ms·

And allmof that actuators include ABS, ESP and whatnot.

by hef19898 3y ago

giantg2 3y ago
The parking brake is a completely separate system (required by law to be separate I'm many cases) that is independent of the hydraulics, ABS, etc. It's literally a cable attached to a lever, or to a motor (the actuator) that applies a shoe in a drum (or in some cases a pad to a rotor).
- hef19898 3y ago
  The parking brake can also just use the rear brake calipers so. And those are attached to ESP and ABS among other things on modern cars. Using the same hardware means interfaces with the systems using said hardware. If the rear calipers are too hard to move without hydraulics, the parking brake might be a seperate system on the rear axle of a car. Those seperate systemsnso don't have the power of the main brake system, even just the one on the rear axle.
  - giantg2 3y ago
    I don't think I've ever seen a car that uses the hydraulics as a parking brake. Yes, some do utilize the pads in the caliper, but they activate them via a cable, thus bypassing any ABS etc that are all involved hydraulically.
    - hef19898 3y ago
      Sure, but said calipers are quote often the same the maonABS brakes use. Hence interdependecies between parking brake and normal brake systems. This dependency cannot be ignored by engineers, and if the choosen trade-off is, for reason ranging from cost over weight to reliability and beyond, an electronic parking brake, well, them that is what it is. And there seems to be something to it, as almost all new passanger cars have those today.
      - giantg2 3y ago
        "And there seems to be something to it, as almost all new passanger cars have those today." That's seems to be a pretty weak argument. You're also forgetting the factor that they can charge extra for more automatic features, or that marketing determined that a significant segment may want it. So it could have little to do with better performance and more to do with positioning and money. Again, what is they interdependence you speak of? The vast majority of cars have the brake systems completely separate - hydraulic with disc/caliper for regular brakes and a cable with shoes/drum for the parking brake. There's really no reason for interdependence, and you really don't see it in the vast majority of new cars.

And allmof that actuators include ABS, ESP and whatnot.

The parking brake is a completely separate system (required by law to be separate I'm many cases) that is independent of the hydraulics, ABS, etc. It's literally a cable attached to a lever, or to a motor (the actuator) that applies a shoe in a drum (or in some cases a pad to a rotor).

hef19898 3y ago
The parking brake can also just use the rear brake calipers so. And those are attached to ESP and ABS among other things on modern cars. Using the same hardware means interfaces with the systems using said hardware. If the rear calipers are too hard to move without hydraulics, the parking brake might be a seperate system on the rear axle of a car. Those seperate systemsnso don't have the power of the main brake system, even just the one on the rear axle.
- giantg2 3y ago
  I don't think I've ever seen a car that uses the hydraulics as a parking brake. Yes, some do utilize the pads in the caliper, but they activate them via a cable, thus bypassing any ABS etc that are all involved hydraulically.
  - hef19898 3y ago
    Sure, but said calipers are quote often the same the maonABS brakes use. Hence interdependecies between parking brake and normal brake systems. This dependency cannot be ignored by engineers, and if the choosen trade-off is, for reason ranging from cost over weight to reliability and beyond, an electronic parking brake, well, them that is what it is. And there seems to be something to it, as almost all new passanger cars have those today.
    - giantg2 3y ago
      "And there seems to be something to it, as almost all new passanger cars have those today." That's seems to be a pretty weak argument. You're also forgetting the factor that they can charge extra for more automatic features, or that marketing determined that a significant segment may want it. So it could have little to do with better performance and more to do with positioning and money. Again, what is they interdependence you speak of? The vast majority of cars have the brake systems completely separate - hydraulic with disc/caliper for regular brakes and a cable with shoes/drum for the parking brake. There's really no reason for interdependence, and you really don't see it in the vast majority of new cars.