Can anybody tell me anything about how the Pumps inside Antilock Braking Systems work? Stuff like the fluid inside them, what pressures they operate at, what it actually does. That kind of thing.|||I don't think anyone will be able to answer this question better than HowStuffWorks.com
Here is a link to their site on how ABS systems work.
http://auto.howstuffworks.com/auto-parts鈥?/a>|||All the ABS pump does is to pressurise an accumulator so that as the dump valve solenoids close fluid under pressure can be fed back into the brake line to reapply the brakes.The judder you feel through the pedal is the shuttle valves opening and closing.The ECU controls the solenoids by sensing the ac signal from the wheel sensors and dumps pressure when it senses to fast a deceleration of a wheel.The pump only runs when the ABS is active and most systems run between 10 to 30 bar.Trucks don't need a pump as the air for braking is under pressure in the axle reservoirs so they only have modulator valves which dump air when the wheels start to lock|||http://search.yahoo.com/search?ei=utf-8%26amp;鈥?/a>
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