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In many places, gasoline (petrol) nozzles are a much smaller diameter than diesel nozzles. This tends to prevent fueling a petrol vehicle with diesel and is WKTE. |
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An RFID transponder on the vehicle that triggers an alert on the pump if mismatched would be a simple fix. The transponders could be easily retrofitted to existing vehicles. |
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The problem with the difference in nozzle diameter is that
it only keeps diesel out of a gasoline tank. It certainly
didn't keep [The Alterother]'s mother from filling the family
pickup with gas and driving several miles before the
problem became apparent. |
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The costs of recovering and repairing a diesel-
fuelled vehicle that has petrol in its tank is a
very effective de facto tax on stupidity. |
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It provides work for mechanics, garages, and
the whole supply chain; maybe even rental
agencies. |
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So, why should consumers be prevented from
the effects of their own stupidity ? Cui bono ? |
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square nozzle, round hole ? |
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RFID sounds good, but please make it so that if no RFID is detected, it gives a warning, but still allows the user to pump the fuel. If an RFID is detected, and it is a fuel indicator RFID, and the fuel isn't compatible, then yes, it would be good to prevent pumping the fuel and give an appropriate error message on the pump. |
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That way old cars don't have to be retrofitted, but could be retrofitted if the owner needed to protect the vehicle from someone's distracted state. You won't get stuck when the RFID system breaks (or someone installs a jamming device as a prank), and you can fill up your old gas can without buying an RFID tag for it. This could also be used to ensure that vehicles requiring a high octane rating don't get filled with low octane gas. Many stations use a single nozzle for three diffrent octane ratings, so RFID could differenciate without modifying the physical standard. |
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If the nozzles are shaped as a polar triangle
and a spherical square respectively,
constrained to a
planar surface, then they can be of very
similar areas and yet retain exclusivity. |
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Stupidity is not my mother's problem, far from it. It's more
like there are some vital details that just seem to escape
her. A gas/diesel lockout nozzle would have prevented her
loss of truck privileges. |
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I like what Scad mientist posted "if no RFID is detected, it gives a warning, but still allows the user to pump the fuel." |
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One problem with any non-round shape is
accessibility. Right now, I can pull my car into a
pump on the wrong side, and the hose will reach
over the car. This is often useful during extremely
busy travel periods, and the ability to use the next
available pump, regardless of position smooths the
flow through the pumps. |
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However, in order to reach, I often need to orient
the nozzle a little to a lot off axis. Any sort of
square or triangular shape would prevent that. |
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RFID makes sense, is easily retrofitable for cars
where there is a concern (rentals, e.g), and as long
as the lockout only functions for the wrong tag,
and not no tag (as discussed above), it doesn't
require an all or nothing roll out, simplifying
implementation. |
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On the other hand, I do see some advantage to
taking cars of the road if they are otherwise in the
hands of someone so confused as to not be able to
tell the difference between gasoline and diesel. I
don't want those people driving around. |
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This idea could perhaps be combined with another common source of fuel-related amusement. |
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Just make sure that all petrol-fueled vehicles have the filler cap on one side, and all diesel-fueled vehicles have it on the other. |
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Then arrange the pumps so that it's not possible to pull up next to the wrong sort of pump with the filler cap on the correct side. |
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Have we not "been there" with this idea many times in the past? |
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Why not just have the nozzles "keyed"? Diesel has 10
notches and gasoline has 9 notches. These match up to
the tabs in the opening to the fuel tank. It seems it
would be easy to retrofit a simple "collar" onto older
vehicles. |
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An added benefit is that with a slight twist, no chance
of the filler nozzle falling out and spraying fuel. |
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the military thinks that one fuel is enough for
everything. There's a logic to that. |
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