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Anti-lock Braking System Pumps?

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.

4 Answers

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  • G6er
    Lv 6
    1 decade ago
    Favorite Answer

    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/brakes/br...

  • Anonymous
    1 decade ago

    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

  • 5 years ago

    Answer is A. I have had ABS since 1994. I like having them. I have driven a long time before I had a car with ABS. I believe this is a good safety feature. During the winter I mount dedicated snow and ice tires. Bridgestone Blizzaks. Offers tremendous traction on snow and ice. If car is not stopping fast enough when the brakes are applied, I put transmission into neutral. Really helps stop the car. Now if the question is about Traction Control, then I am not so enthused. Sometimes it is handy, other times it is a disadvantage.

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