Hello:
If one wants to monitor and quantify fuel consumption in a pre-OBD diesel, like many Mercedes and other European and Asian cars and engines, and want an accurate measure, the need of a couple of accurate, robust and cheap fuel flow meters is mandatory. Actually two are needed, on for main flow and the other for the return flow.
There are other ways to estimate fuel consumption, vía electronics, in which some members of the Fórum are experimenting.
This result (lt/h) can be addressed later to a onboard trip computer, together with the VSS signal (km/lt), such as MPGuino and other non OBD computers.
The list of the best fuel flow meters I have found follows. If someone has something else, please contribute to the thread.
LIST OF (diesel) FLOW METERS:
This is probably the most convenient:
Flow Sensor
Price: USD 12.9 a piece
BTFlowmeter:
FCH-m-POM-LC -0,8 LPM 97478617 : B.I.O-TECH Flowmeter
Differential Flow-calculator ARS 261: B.I.O-TECH Flowmeter
Price: not known, quotation asked.
Ada Fruit:
Liquid Flow Meter - Plastic 1/2 NPS Threaded ID: 828 - $9.95 : Adafruit Industries, Unique & fun DIY electronics and kits
(I think this is for water only)
Price: USD 9.95
Technoton DFM:
http://www.jv-technoton.com/fuel_flo...uel_flow_meter
Price: USD 350.
This is heavy duty, very good and expensive too. This is composed of two flow meters that calculates main flow, return flow and the difference, and produce a signal with the result. So no need to build a circuit.
Someone knows other sources?
Oldbeaver