[oldbeaver]

Originally Posted by oldbeaver

Hello old diesel fellows,

There is guy in India who sells a complete system consisting of two diesel fuel flow meters (one for supply and one for return fuel) and a LCD digital display that shows a several consumption values, including the difference between the two if I am not wrong. Fuel consumption in liters/hour.

Fuel Consumption Meter - Diesel Generator Fuel Consumption Meter, Automobile Fuel Consumption Meter, Vehicle Fuel Consumption Meter and Fuel Consumption Calculator Manufacturer & Exporter from Mehsana, India

To calculate accurate fuel efficiency (mpg or km/liter), the only thing missing is to take the speed signal existing in our cars (or generate it if not), which is in miles/hour or km/hour, and divide by consumption.

The system looks robust. It should allow to get fuel efficiency in km/liter (or miles per gallon) with very little programming. Maybe it can be done using the elabtronics kits:

AutoSpeed - eLabtronics EZ System, Part 1

The result should be shown in the very same display of the indian system.

Someone will take this project? It looks very attractive and possible.

Oldbeaver

Last minute: I got the price: USD 650. Too expensive I think.

I found a much cheaper set for diesel flow metering in a IDI diesel:

Flow Sensor

Look for "gasflowmeter", just arrived, they say.

It has a digital display and one flow meter. We need to buy the second flow meter, and a processor to calculate difference between supply and return fuel, and combine with speed signal. Not easy for my digital electronics knowledge.

I cannot guarantee duration of this flow meters, but if the system works, one can replace them later if they fail.

Oldbeaver