sheltonfilms
New Member
So over the holidays, I'm going to try to install a Ford Explorer Message Center into my Ford Ranger. Shown below.
**broken link removed**
This computer takes signals from your Engines computer (fuel flow rate and speed) and from your fuel pump (fuel level), and it can output your MPG and Range.
Now here is the problem I face. The gas tank that comes on the Explore is 18.4 gallons and my tank is 16.5 gallons, which doesn't mess with the MPG reading but it can mess with the amount of miles left till empty (range). Here is some Matlab graphs showing what the real range is vs the output shown on the computer (assuming a MPG of 23):
**broken link removed**
**broken link removed**.
As you can see the difference is pretty significant at a full tank (around 44 miles), but the differences becomes smaller with the decrease of the fuel of the tank.
Both vehicles are set up to show the resistance range 22 ohms-145 ohms. 145 being full, 22 being an empty tank.
Is there a way to have the output resistance of the fuel pump be modified before it gets to the computer? In other words instead of 145 ohms when it is full, the computer reads 132.3 (the resistance the computer would see as having 16.5 gallons), but still show 22 ohms when empty.
Pretty much create a mathmatical function with the input variable being the resistance from the fuel pump and the output being the modified resistance for the computer to calculate the range correctly. Then take this function and make a physical application.
**broken link removed**
This computer takes signals from your Engines computer (fuel flow rate and speed) and from your fuel pump (fuel level), and it can output your MPG and Range.
Now here is the problem I face. The gas tank that comes on the Explore is 18.4 gallons and my tank is 16.5 gallons, which doesn't mess with the MPG reading but it can mess with the amount of miles left till empty (range). Here is some Matlab graphs showing what the real range is vs the output shown on the computer (assuming a MPG of 23):
**broken link removed**
**broken link removed**.
As you can see the difference is pretty significant at a full tank (around 44 miles), but the differences becomes smaller with the decrease of the fuel of the tank.
Both vehicles are set up to show the resistance range 22 ohms-145 ohms. 145 being full, 22 being an empty tank.
Is there a way to have the output resistance of the fuel pump be modified before it gets to the computer? In other words instead of 145 ohms when it is full, the computer reads 132.3 (the resistance the computer would see as having 16.5 gallons), but still show 22 ohms when empty.
Pretty much create a mathmatical function with the input variable being the resistance from the fuel pump and the output being the modified resistance for the computer to calculate the range correctly. Then take this function and make a physical application.