DaveInDenver
Rising Sun Ham Guru
I have not really tested that with my wife’s Outback to answer. But I’m assumings it’s just a parking brake not an emergency brake anymore.
The button activates an electric motor on the rear calipers. So if the car is running they should still operate. But if the car looses power I’m assuming they don’t work.
Would be interesting to see the assumed logic the electronics must have to allow you to use it in an emergency.
Example: try pushing your parking brake button on the freeway.
It's not really that far fetched. The assist on steering and regular service brakes are electric, too. In some ways more reliable than hydraulic and vacuum, too. So there's no reason I bet they couldn't build a solenoid that fires with enough force to cam a little shoe into place for emergency stopping.How do you slow down under control if you lose your hydraulic brakes? I’ve used the park brake lever before in that situation.
Was just reading about Boeing aircraft. The 777/787 work on fly by wire so the control surfaces no long have a direct connection, be that with cables or even hydraulic, so the pilots can't even in theory work them together like was the case before. Now whether knowing that along with Boeing's current record of safety is comforting or not, well, yeah.
Be that said, our Forester is old enough that it still has regular parking brakes, although it does have the electric power steering and fancy electronic brake booster for traction control. I do like that part of old tech...