Thread: Electric Hand brake

If Id designed it..

it would be an electric over mechanical setup like trailer brakes but in reverse IE electrically pulled off mechanical spring applied brake.

so in theory if you were sitting with the parkbrake on then thered be no volts at the brake actuator.

But you could also do it with a pulse to change state setup by using an over center solenoid so one pulse of power applies the brakes and the next releases them.

Funny you should ask that.

Discussion being had on disco3:

DISCO3.CO.UK - View topic - STOPPING ON STEEP SLOPE

Looks like there may be a technique for stoppig on a hill.

that thread doesnt appear to be talking about the park brake but the automatic brake lock.

If you brake to a halt its essentially a non return solenoid that stops the brake fluid from returning through the master cylinder. Very Cool for hill starting an auto

Originally Posted by Blknight.aus

that thread doesnt appear to be talking about the park brake but the automatic brake lock.

If you brake to a halt its essentially a non return solenoid that stops the brake fluid from returning through the master cylinder. Very Cool for hill starting an auto

My 1955 Jaguar Mk VIIM had one of those. Called anti-creep or hill-hold.

It electrically operates, via cable, a set of drum brakes at the rear wheels.

If you are doing over a certain speed it then activates the rear disks and operates as an emergency brake.

If you get mud in it it makes an horrendous shrieking noise that causes all heads within about a 500m radius to turn and look! You then need it cleaned out (before it implodes)!

Originally Posted by Jamo

If you are doing over a certain speed it then activates the rear disks and operates as an emergency brake.

The emergency function operates all 4 discs at maximum, but if the hydraulic system has failed then the drum brakes are applied even at high speed.

Just imagine having a rego check done by a mechanic who doesn't know and he/she pulls the switch to test the hand-brake.....

Originally Posted by Jamo

It electrically operates, via cable, a set of drum brakes at the rear wheels.

If you are doing over a certain speed it then activates the rear disks and operates as an emergency brake.

If you get mud in it it makes an horrendous shrieking noise that causes all heads within about a 500m radius to turn and look! You then need it cleaned out (before it implodes)!

Thanks Jamo. Some clarification though!

There's the button/lever, the cable, the drum brake.
What and where exactly is the electrical mechanism?
Does the drum have an electric mechanism in it, triggered mechanically via the level in the cab?

I assume this is the case as the manual method involves unbolting the lever and manually working the mechanism.

What is the "powered" position of the drum actuator, brake engaged or released?
And are there implications for this when the battery is flat?

This drum brake; is it on both rear wheels or only one?

Oh, and I've had that shrieking noise! Picked up a rock or some such on a track but it went away after a few K's.
http://www.youtube.com/watch?v=XDLl6...16-2-08-a.html
Cheers.

Originally Posted by p38arover

My 1955 Jaguar Mk VIIM had one of those. Called anti-creep or hill-hold.

Studebaker and others had a hill holder in 1927