What kind of FE instrumentation for Pre-OBD2 Diesel

[Hilly-Billy-13]

Originally Posted by Hilly-Billy-13

rodeo1314
The Futerlec & most low cost fuel flow sensors use a digital output "Hall Effect" sensor. They're defined as an open collector output, what this means is the 3 wires are hooked up as follows Red goes to the positive side supply, if your using a Arduino or similar, use 5 Volts, the Black goes to the minus side of your supply. The you need a resistor between the positive side of the supply and the white wire which is your output. I've seen values from 10 K on down, some arduino pins have a pullup resistor as an option. I haven't received my sensors yet so I can't say for certain what value of resistor is needed.
Bill

Oh yes back in the mid to late 70's & early 80's I did some work on Dyno instrumentation I wish I'd had access to the sensors we can get now.

I got my sensors, they changed the wiring, the White wire is now Brown, I'm hopping to hook up 1 in the return line with a counter to see how many counts per minute I get when idling. I haven't came up with w good mounting bracket yet for them.
Bill

[AndrzejM]

Originally Posted by Hilly-Billy-13

I got my sensors, they changed the wiring, the White wire is now Brown, I'm hopping to hook up 1 in the return line with a counter to see how many counts per minute I get when idling. I haven't came up with w good mounting bracket yet for them.
Bill

Cool! I'm looking forward to see the numbers. I'm very curious to be honest.

[Hilly-Billy-13]

Well I put together a simple power supply using a 78LM05 & a couple of caps, & wired up one of the flow sensors to it using a 10k pull up on the output line & a .1 micro cap on the supply by the sensor. Then I found out my frequency counters not working, and my main scope a Tek 7504 wouldn't trigger. So it was time to break out the back up a Tek 545 )I bought to keep it from being stripped of it tubes & throw in the trash), I get a good solid pulse each time the magnet passes the sensor, but no way to count the pulses at this time. And the weather in Salem ,OR. has been on the wet side. I can create a Simple schematic if any one wants it, I'll have to email it to someone who has picture posting rights & have them post it.

[AndrzejM]

I can't remember what's the number of posts that allows to post pictures, but I'm sure that you're about that number.

Anyway sorry to hear of your Tek.

[Hilly-Billy-13]

Quick update, the Fuel Flow 30 AKA Savant FS-3400AH runs into it's "max" flow on my VW Rabbit at about 59 mph. Looking around I found the Vision 1000 & Vision 2000 the 1000 with a flow rate of .1 to 2.5 liters per minute looks like the best solution for the smaller engines and the 2000 with a flow rate range of .5 to 35 liters per minute looks like it's well suited for the bigger engines. The down side is they cost more than the Fuel Flow 30.
Bill

[oldbeaver]

Originally Posted by AndrzejM

Let me help you with that:

FLOWFUEL30L0 - 2.0 to 30.0 L/min Diesel and Gasoline Flow Sensor

FCH-m-POM-LC -0,8 LPM 97478617 : B.I.O-TECH Flowmeter

This flow meters may work well and cheap enough for preparaing the Arduino board and software.

Liquid Flow Meter - Plastic 1/2 NPT Threaded ID: 828 - $9.95 : Adafruit Industries, Unique & fun DIY electronics and kits

fuel flow meter | eBay

This last one has attached a small board computer that may be posible to modify to our purpose of measuring real time fuel flow.

Liquid Flow Meter - Brass 1/2 Nominal Threaded ID: 833 - $24.95 : Adafruit Industries, Unique & fun DIY electronics and kits

Flow meters, Lowflow Flowmeters, Low Flow Turbine Flow meter, Fuel Flowmeters, Fuel flow meter, Watermeters, Paddlewheel Flow meter, Oil flow meter, Oilflowmeter, Waterflowmeter, Water meters, Turbineflowmeter, Oilflowmeter, Digitalflowmeter, Chemica

Any comments?

Old Beaver

[Hilly-Billy-13]

The problem I can see with the Ebay flow meters is getting the specs on them, and the counter modules may very well be a "Chip On Board" which means the computer chip is glued to the board then covered with epoxy making it hard to identify, or program.

[Hilly-Billy-13]

I'm going to use my pair of Fuel Flow 30's to debug things, a suitable pump would make things easier than hooking them up to my Rabbit to test things. But that's what I've been doing.

[skyking]

Thanks for the hard work, HB.

[oldbeaver]

Dear fellows diesel mpg hunters:

I found this cheap circuit that triggers a switch and can be activated with any sensor, for default, light.

http://www.autospeed.com/cms/article.html?&A=113008

I am not strong in electronics, but some of our Smart posters may find the way to use this switch to measure fuel dosage in old diesels.

OldBeaver