MembersPage/MattiasSandgren (2005-04-29 05:23:28)

Question

There are a few pages in Wiki that describe fuel injector properties:

How would one go about to determine what the correct values are, for the most important parameters?

My plan would be to get an engine already running with a Genboard where I have simply copied these values from other configs - so I manage to get the engine to start, run and idle reasonably well.

Also, it depends on flyback besides injectors (but low voltage 2x0.7V flyback is standard anyway).

Emil used simple lowvoltage 2x0.7V diode flyback for 1600cc (!!!!) injectors (cyl displacement=2250cc/4), and could get the engine idle OK (not perfectly though) with just guessing, without sophisticated measurements ?

What would be a method to find these values, just by playing around with VE values and observing lambda and injector opening times?

The absolute nice way is to

and measure the fuel flowrate (amount of flown fuel in known time) in function of pulsewidth.

Suggested measurements:

Document it in a table in wiki, and we'll help make config from it.

Fire extinguishers at hand. No smoking, etc...

Q: Should injopen, injocfuel and other related parameters be set to specific values or does it suffice if they are given as additional information to the flow table created?

I don't understand teh question. I try to answer it, but please clarify.


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About me

I am the main site administrator of [Sävar Turbo Site] and I have in recent years become more and more interested in combustion engines and cars in general. I have a computer geek background but mechanics always intrigued me - not only electronic gadgets.

I have several cars but my two main projects are :

The Volvo is long term, my focus is currently on the BMW. I plan to replace the Motronic ECU of the 325iX completely.