Тема: How to check precision of fuel flow meter. Experiments.

After installation of fuel flow meter you will want to check its precision.

There are several ways to do it

"Refueling" method:
1. Refill fuel tank for max, till visible level of fuel.
2. Leave vehicle to perform its usual operations to consume at least 1/2 of tank.
3. After it make refueling till max and visible level of fuel in tank again and measure volume of refueling.
4. Compare volume of refueling with consumed fuel volume by flow meter.


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2 (2017-01-03 00:01:52 отредактировано Mechatronica)

Re: How to check precision of fuel flow meter. Experiments.

"Measuring tank" method

What do you need for this method:

1. Calibrated standard measuring tank of the 2nd precision class, 10 liters
2. clean capacities, >10 liters
3. 500-1000 ml capacity measuring flask of the 2nd class with a continuous scale
4. Transparent fuel hoses  - 2 pieces.


1. Connect fuel hoses as shown at picture

Flow meter Delta test 0

Supply and return lines will come from tank capacity with some fuel volume inside.

2. Start engine and let it run until both fuel hoses will be fulfilled by fuel. No air bubbles is allowed.

3. Prepare second tank with exactly 10 liters. Attach it to the vehicle tightly.

4. Connect second tank instead of first one. Fuel inside fuel hoses must be saved.

Delta fuel flow meter test

5. Let vehicle perform its usual duties. No pure idling is allowed.
Vehicle must spend some fuel in idle, normal and hard load more (preferably). So you can test flow meter in all operation conditions.  Be sure that supply hose fully immersed in fuel and air can't get into fuel system.

6. Stop engine. Remove fuel hoses from measuring tank. Fuel from the hoses must not drop in measuring tank.

7. Measure rest of fuel from measuring tank and calculate fuel consumption. Compare it with fuel meter data.


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3 (2017-01-03 00:01:42 отредактировано Mechatronica)

Re: How to check precision of fuel flow meter. Experiments.

Measuring tank with simulated fuel comsumption method

Same with previous method.
But you must have much bigger tank capacities - at least 50 liters.

Make extra fuel hose connection between relief valve and connect it with extra fuel capacity with 50 liters.
Install an usual crane in this hose.

Connect PC with configuration software or Eurosens Display to see instant fuel rates during experiment.

See picture

Delta_test_tank_simulated
You can now simulate engine consumption by opening crane. Fuel will pass fuel secondary tank before return chamber of flow meter.

As flow rates in supply/return line is much bigger than fuel consumption - 10 liters is not enough.
Thats why we need least 50 liters for an experiment. Fuel in supply tank will finish fast.

Measure rest of fuel in supply tank and compare with fuel flow meter data.