Determine Fuel Consumption

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Determine Fuel Consumption

Postby joaocaleira » Thu Sep 28, 2017 9:05 am

Hi,

I´ve been using MLV on my tests with a Honda GX31, and i would like to know a way for me to determine the fuel consumption for a certain RPM value. For example i stabilize it at 3800rpm for like a period of 30 seconds, and i would like to know how much the engine consumes in average during that time. The problem is that the pulse width varies during that time, and i also dont know how to determine the dead time of the injector.

So is there a way to obtain the fuel consumption directly? To obtain a average value for that period? How can i do this?

Thanks
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Re: Determine Fuel Consumption

Postby whittlebeast » Thu Sep 28, 2017 9:07 am

Do you have VVS in the logs?

VSS = Vehicle Speed Sensors

Andy
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Re: Determine Fuel Consumption

Postby LT401Vette » Thu Sep 28, 2017 10:51 am

There is a Fuel Flow field under:

Calculated Fields --> Optional Fields

If you turn that on, you can select the range you are interested in and it will display the average over that range.

As for dead time, if you don't have a sheet, you need to flow test them or just use 1ms and accept there will be some small error.
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Re: Determine Fuel Consumption

Postby joaocaleira » Thu Sep 28, 2017 12:03 pm

whittlebeast wrote:Do you have VVS in the logs?

VSS = Vehicle Speed Sensors

Andy


No i dont have unfortunatly
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Re: Determine Fuel Consumption

Postby joaocaleira » Thu Sep 28, 2017 12:04 pm

LT401Vette wrote:There is a Fuel Flow field under:

Calculated Fields --> Optional Fields

If you turn that on, you can select the range you are interested in and it will display the average over that range.

As for dead time, if you don't have a sheet, you need to flow test them or just use 1ms and accept there will be some small error.



Thank you very much for the reply, it helped me a lot.
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Re: Determine Fuel Consumption

Postby benckj » Fri Sep 29, 2017 12:45 pm

I'm looking at doing something similar except want to display real time economy on Shadowdash display. The Droid HU being used already has GPS speed so it should be able to calculate real time fuel usage. Ideas on how to do?

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Re: Determine Fuel Consumption

Postby whittlebeast » Fri Sep 29, 2017 12:59 pm

MPG = MPH / ( Duty Cycle × constant )
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