With a plethora of integrated, microprocessor-controlled systems throughout the car, delivering countless calculations per second regarding speed, throttle position, temperature, fuel mixture, the car's attitude to the road — even navigation systems that can pinpoint your location within feet no matter where you are on the planet — the ordinary gas gauge continues to give you, at best, a vague estimate of how much fuel you have in the tank.
Giving The Customer What They Want Have you ever noticed that your gas gauge stays on full for quite a while before the needle even moves and then it moves faster and faster as it approaches empty? And then when it gets to "E" it sort of stays there for a while until the low warning light comes on, which might even be accompanied by a friendly chime, just in case you didn't get the visual memo that it's time to fill up?
It turns out it's partially your fault that gas gauges work that way. The engineers calibrate them to do that. Because you, the customer, have told them that's the way you like it. We spoke with Phil Pierron, an engineer at Ford his title is actually "Technical Expert for Systems Engineering in Core Fuel Systems , who told us, "Our customers really didn't want to run out of fuel when they hit 'E'. Customers do want some amount of fuel when they get to 'E'.
Again, according to Pierron, "[Customers] want it to say on full for an amount of time. And just as you have a 'reserve' that kicks in after you hit 'E', the engineers call this stickiness on the 'F' mark a 'full reserve'.
Whatever Happened To Accuracy? If fans of accuracy were giving out grades, they just might give that attitude the same 'F'. The very idea of calibrating a gas gauge to assuage our feelings toward our car is akin to setting your clock ahead 10 minutes so that even though you know it's 10 minutes fast, it somehow motivates you to get out of bed earlier, when in reality all it does is encourage you to snooze away that extra ten minutes anyway.
The difference with the gas gauge is that those 10 extra minutes are not optional on the driver's part. We are stuck with gas gauges designed to make people feel better, not accurately report the level of fuel in the car. While customers want there to be a reserve of gasoline available when they reach the empty mark, there isn't technically a reserve tank, there's simply a real empty point that is not marked on the gauge.
At the same time customers don't want too much of a reserve. Otherwise, they will complain that their gallon tank only takes 15 gallons when filling up from empty. Fuel Systems. Related Resources. If you are replacing your fuel pump, consider cleaning your fuel tank to protect the longevity of your new fuel pump. We recommended draining and removing the tank from the vehicle and following these steps for the best cleaning method.
Click here to learn more. Technical tip. This wiring kit is to relocate the power and Insufficient pressure and flow are an indication that a fuel pump is under-performing, but do not necessarily mean that it is failing. Low voltage or a bad connection or Replacing a fuel pump can become a costly mistake if it is not the true cause of a fuel related problem. A fuel system should be carefully tested for pressure, volume, and See Product Details.
Delphi Capability Advanced Diesel Diagnostics. Common Rail Injector. Electronic Unit Injector. Common Rail Pump. Engine Management. Distance in kilometers. This means that when the float reaches the halfway point on the tank, there may be more or less than half of the fuel left in the tank, depending on its shape.
You may be surprised at how much fuel you actually have left when the needle is on empty. To find out, check your owner's manual for the exact volume of your fuel tank. Then, the next time your needle shows empty, find the nearest gas station and fill 'er up.
Subtract the number of gallons it takes to fill your tank from the volume stated in the owner's manual, and you'll know just how much farther you can go when the gauge hits empty. Sign up for our Newsletter! Mobile Newsletter banner close. Mobile Newsletter chat close. Mobile Newsletter chat dots.
Mobile Newsletter chat avatar. Because of their simplicity and reliability, the fuel measurement and its display have remained pretty much unchanged over the decades. However, like almost everything in the modern motorcar, some electronic devices have been included, not as a replacement for the proven classical arrangement but to complement it. It provides a clear visual notification that the vehicle can travel only 30km to 60km more with the remaining fuel. In certain cars, digital gauges with LCD or LED readouts have replaced the mechanical instrument and its analogue needle.
The function of such gauges is the same, and the good old float arrangement continues to serve as the measuring device.
0コメント