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I am posting this for general info. MIT has a feature on their site called “Ask an Engineer” I have been in many disputes with them to the point that they won't even answer me anymore. But if you can't trust MIT to know what they are talking about who can you trust? Read this and tell me if you think this guy has any idea of what he is talking about. I think the whole education system is in the toilet compared to what it used to be. One totally book educated fool teachers another and they all lack any real world experience.
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Is this the link you were referring to? Use the “insert/edit link” button (shaped like a chain link) to paste the URL into.
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That is really sad IMHO. The poor chap has successfully described a flow-check valve which has been around since I can't remember when, and it doesn't divert ANYTHING! It merely stops the flow. It's not the same thing. In the brake system model depicted, the flow of brake fluid to the front brake cylinders isn't diverted to the rear at all (this shows what they know about vehicle systems), instead the flow to the front is merely blocked and the remaining pressure and volume go to the rear cylinders. And besides, brake systems aren't plumbed that way anyway. Most of us under-educated folks know that vehicle brake systems have been dual systems since the early 70's? And they are diagonal or “X”'d, in that one circuit of the dual piston master cylinder controls one front brake and the opposite rear brake, and the other circuit controls the other front brake and the opposite rear brake. So, if there is a failure in one circuit you stand a much better chance of not skidding out of control. Since the late 70's with the introduction of anti-lock systems (they were initially called anti-skid but that was a bold faced lie.), I understand that there have been changes in the plumbing logic but I can't be sure what they are.
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You are right on Bob….. and in addition he says ” Construction equipment in particular relies on bypass valves to relieve pressure build-up. “If you’re operating a bucket loader,” Winter explains, “you open a valve that pumps oil into the arm that lifts a piece of concrete. You shut that valve off when you’re through, but the pump is still running and trying to pump fluid into a closed valve.”
If you have closed valve when you release the handle that's a closed center hyd system and the pump simply stops pumping. The poor guy is clueless. There is lots of stuff on this MIT ask and engineer that is way off base.
Like a lot of free advice it's worth every penny
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