Fuel Consumption from Dyno Test

G,day

The use of fuel flow meters (usually) allow the calculation of fuel consumption when using a dyno. Variations in fuel consumption can be due to many factors when using a dyno.

Regards

Paul

not really sure how the litres per km could be measured, but a simple test would be a fuel flow metre and measure the ratio of fuel to kW hours

Hi Chump Boy,

Calculating fuel economy is typical calculation for a chassis dynamometer. Ratio of roller size and rotational speed gives distance and a gravimetric fuel flow meter (additional test equipment) will give fuel flow. Combining the two provides for calculation of fuel economy.

Regards,
Hugh

Hello chump_boy

The fuel consumption calculated would be highly accurate in relative terms but not in absolute terms . That is , between the two runs , percentage consumption gained or lost would be accurate , but road consumption accuracy would depend on the drag configuration of the vehicle .

Hi Chump Boy,

As others say the fuel economy can be measured easily by the use of a fuel flow meter, strickly not part of the dyno but often used in conjunction with one.
What is probably not realised , specially if you are looking for particular result, is that there are many variables in such an exercise as this and eliminating them is vital to getting accurate and meaningful results. eg. was the dyno load applied exactly the same in each case ?
In my view the difference is small and most likely within the limits of variability [and possibly also accuracy] of the test method and equipment.

Ken

He may have been using the figures from a "trip computer", as most vehicles tend to come equipped with these nowadays???

Dunno??

But!!!
I'm weary of wild claims, even if I saw it with my own eyes!

If he want's to prove that this fletch fuel filter really works, he could hand them out(with a bond, of course) and not charge the customer, until that customer has realised a fuel saving!!

The customer would therefore only "lose" the amount of money it cost to install(and subsequent removal) of the flitch! ;)

Thanks everyone for your responses.

I now know a bit more about dynos!...lol

Cheers,

Chump