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Re: Questions about AIR BRAKES ???
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Posted by Bob on January 11, 2006 at 19:15:28 from (64.21.249.40):
In Reply to: Questions about AIR BRAKES ??? posted by Way Up Here on January 11, 2006 at 18:47:13:
1.) An engine-driven compressor builds up air pressure in the storage tank(s), typically about 120 PSI. When you step on the treadle valve, air pressure is delivered to the individual wheel brakes, often through a series of relay valves, for quick operation. When you release the valve, air is dumped from the system, often with the aid of "quick release valves", and the brakes release. ABS systems have added a whole layer of complexity, but that describes the basic operation of a simple system. 2.) One reason air brakes may be better, is that they do not suffer from brake "fade" caused under conditions of heavy braking and high temperatures, where brake fluid boils, and gets bubbles in it, and is less effective at aplying the brakes.
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