How do cars measure fuel level accurately when the fluid is constantly sloshing around?

Question

How do cars measure fuel level accurately when the fluid is constantly sloshing around?

In: 2855

Answer 1

Low pass filter on the signal. ELY5: average the measurements over time — assuming the sloshing varies randomly it will ‘balance out’ and you’ll get a more accurate number. Unless you’re driving a rocket ship this averaging is still responsive enough, you won’t mistake how much fuel you’re using.