General Category > General Discussion
Fuel Strips (Film type fuel sensor)
sq5rk:
--- Quote from: Shaggy on July 12, 2013, 10:13:57 PM ---
Did you take the bike for a ride?
--- End quote ---
Yes , I did. I thought the same. ~800 km's, but nothing has changed.
Haakon:
How do the fuel level "strip" work?
My guess is (simply explained) its a plastic strip with a low heat element on one side and a series of heat sensitve resistors on the other side.
(the heat sensitive resistors can be PT100`s or some other type.)
(why PT resistors? PT`s is easily "printed" on plastic or whatever none conductive materials)
One drop of (conductive)moisture would result in a faulty reading.
----------------
The float type sensors also use resistance to meassure the fuel level.
The huge difference is its a basic "potentiometer" type device.
The more expensive ones are actully wirewound- meaning self cleaning.
The current used is also much higher = less sensitive to "slight contamination".
------------
I am sure the CANbus will not accept a disconnected fuelstrip as it monitors both the heating and resistor part.
To bypass the heating circuit must be easy- a plain resistor of the same value as the heating element.
How get a float sensor to work and show real values...- I do not know
Sorry to waste your time,
Haakon
deciacco:
Stephan,
I was hoping you could explain the fuel strip values for me:
I've attached an image showing the reading form the gs911. The left shows the fuels strip idling while the right side shows the fuel strip being polled.
It looks like as long as the computer is turned ON there is a very minimal amount of current going to the heater. Usually, about 2.42mA. Can this vary from strip to strip? What is the "normal" value/range here? The strip heater voltage seems to be very minimal as well at 0.07V. The Fuel Sense Voltage is always 0 on my bike, I'm guessing this is for those equipped with a float, but have no idea. I don't understand the Film Sensor Heating percentage. When the fuel strip is being polled this seems to jump to 62.8%. Is this normal? Why wouldn't it hit 100%? Also when the strip is being read, the heater current jumps to 187.76mA and the voltage to 1.05V.
I'm trying to determine what these values are telling me and if they are withing the accepted ranges as I believe my fuel strip is on it's way out again.
Also, is it possible to show the resistance reading from the sensor circuit?
Thanks,
-E
Haakon:
I know you asked for Stephans advice- I am NOT him!
I did reply to this thread earlier and pray THAT reply did not confuse you.
I have no real information on this topic and my reply was based on "industry" use of the same basic technology.
(not used any more- "abandoned" years ago)
--------------
I am again just "guessing":
I do not think the fuel level is constantly monitored. That would steal too much computer usage.
I guess its checked/ monitored maybe every second or MUCH less.
If the engine is not running maybe its NOT checked more than once- done when the ignition is turned on??
The bikes computer is "tiny"- engine managment is more important than fuel level- thus the fuel is checked more seldom.
BUT- I may be all wrong re this!!!- I am just guessing!!!
deciacco:
Haakon,
Thanks for your response. I have somewhat of an understanding of how it works at least based on this threadhttp://advrider.com/forums/showpost.php?p=18095884&postcount=48, I just don't understand the real-time values from the GS-911 as the strip is being polled.
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version