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Post by ZandraJoi on Jan 29, 2023 8:01:24 GMT -5
www.familyhandyman.com/article/how-do-gas-pumps-know-tank-full "Gas pumps have been around long before "smart" technology. So how are they able to detect when your tank is full?..." My notes: What was your guess? Here's the answer: "Well, it has to do with the way the gas pump works. When you fill your tank with gas, you’re replacing the air that’s in there. “The more gas goes in, the more air must come out,” explains Jake McKenzie, Content Manager at Auto Accessories Garage. “It comes out through a small pipe located just inside the gas nozzle.” And pressure has built up in the tank; that pressure is released as the air escapes. McKenzie compares it to holding your thumb over a garden hose: “Blocking part of the hose [increases] the pressure of the water inside, [causing] the water leaving to spray out at an even greater velocity.” When you start to pump gas, the pipe, which has been “blocked” like the hose, releases the air quickly. “This expelled air brings with it a pressure that’s strong enough to hold the valve in the open position,” McKenzie says...."
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Post by Steve on Jan 29, 2023 15:18:21 GMT -5
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Post by lainee on Jan 29, 2023 16:48:00 GMT -5
Didn't know that..makes sense though
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Post by demonskeith on Jan 31, 2023 1:52:35 GMT -5
Always figured there was some switch, nice to know it's some kind of air pressure at work. Was also warned by my parents to never top off the gas tank, don't get why people do that.
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Post by Bob on Feb 26, 2023 18:51:03 GMT -5
I understand now how it works. Makes sense.
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