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ТЕМА: Automotive Fuel Gauge Technologies In Use?

Automotive Fuel Gauge Technologies In Use? 5 мес., 2 нед. назад #3184

  • AlexAmery
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Hello,

The typical automotive fuel gauge has a float in the fuel tank turning a pot that's in series with an ammeter that's the gauge. The gauge is a dual coil moving iron type which is a bit unusual compared to a typical meter used in electronics. If you measure the voltage on the wire between the sender and gauge, the system is essentially a voltage divider and you can measure a DC voltage proportional to fuel level. This works most places where it's been tried, but one place it hasn't worked is a 2016 Toyota Corolla. Instead of a swing of 4 - 6 volts across the fuel range, we are seeing readings of less than a volt from an empry tank to a full tank. I'm not quite sure what's going on to account for this small range of voltage swing. I'm wondering if the Toyota uses a different technology for reading the fuel gauge. I have read that ethanol additives in gasoline are wrecking havoc with fuel gauge senders, and some systems are energizing the system only for brief intervals while the gauge is being read. It's the same system but instead of being powered ontinuously, it's powered only when a reading is taken. Can anyone confirm this is the case on the Toyota or how wide-spread the use of this type of system is? Any info about other systems in use?

I didn't find the right solution from the internet.

References:
www.electro-tech-online.com/threads/automotive-fuel-gauge-technologies-in-use.152769/
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Thanks
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