Printable Version | Subscribe | Add to Favourites
New Topic New Poll New Reply
Author: Subject: ABS
DorsetStrider

posted on 2/4/05 at 02:47 PM Reply With Quote
ABS

Anyone know how ABS systems work? I mean are they electrical or mechanical? what actually controls them?

this is just ideal speculation but you know what they say.... knowledge is...erm...something something.





Who the f**K tightened this up!

View User's Profile View All Posts By User U2U Member
mackie

posted on 2/4/05 at 03:07 PM Reply With Quote
ABS as I know it consists of a bunch of sensors (typically 1 per wheel) which are connected to a controller. Using these sensors the controller can detect when a wheel is locked and then modulate the braking on that wheel. The bit that does that hard work is basically just a pump and a bunch of valves allowing the braking to each wheel to be modulated invidually.
View User's Profile Visit User's Homepage View All Posts By User U2U Member
smart51

posted on 2/4/05 at 05:34 PM Reply With Quote
ABS systems are controlled by computer. There are two electronically operated valves per channel (usually one channel per wheel). One valve isolates the wheel from the brake pedal to stop you adding more pressure, the other dumps the pressure already in the wheel to a reservoir. A pump pumps the excess fluid back into the master cylinder to stop the brake pedal traveling to the floor.

There is a wheel speed sensor in each channel. The computer monitors the speeds of each wheel constantly. if, during braking, it sees one or more wheels slowing down more than it should it releases some of the brake pressure in that wheel and re-applies it slowly. if the wheel starts to lock up again then it releases some pressure again.

modern ABS systems will find the maximum brake force for each wheel and keep them there. they call it electronic brake force distribution.

View User's Profile View All Posts By User U2U Member

New Topic New Poll New Reply


go to top






Website design and SEO by Studio Montage

All content © 2001-16 LocostBuilders. Reproduction prohibited
Opinions expressed in public posts are those of the author and do not necessarily represent
the views of other users or any member of the LocostBuilders team.
Running XMB 1.8 Partagium [© 2002 XMB Group] on Apache under CentOS Linux
Founded, built and operated by ChrisW.