sequential injection

[Elsmoortelg]

I know it is not originally designed for sequential injection and according to the explanation on the home site it is not important.
But never the less is there a version existing that can do this for a 4 cylinder engine ?
Think it is interesting for fuel consumption and injection timing for max efficiency of produced power.
Anybody has some more information ?

[jsmcortina]

I am unaware that anyone has (yet?!) extended Megasquirt to do 4 fuel outputs let alone sequential. There would be significant code changes required to support this.

James

[Elsmoortelg]

Think I saw already a module who could fire 4 individual coils. So I think 4 injectors should be possible to.
I have a bit of experience in programming (normal languages like C++, Delphi etc) but not on assembler level.
Somebody knows some good books or sites to trie and lurn it ?

[bcrx7]

Well the injection is a little bit different than ignition. Ignition is almost an on/off switch (not that simple, but just showing a point) while injection has pulse width and such.

[Keithg]

Well the injection is a little bit different than ignition. Ignition is almost an on/off switch (not that simple, but just showing a point) while injection has pulse width and such.

Actually, I think the ignition and its permutations comprise more lines of code in MSnS-E than injeciton...

KeithG

Posted by email.

[jsmcortina]

Both fuel and ignition are complicated and involve hundreds of lines of code. To support sequential you also need cam and crank signals and some means of determining when to fire the fuel. You probably also want trim tables.

These all add significant code and would consure more flash and ram.
The ram on the MS1 processor is already at bursting point.

James

[aerowerks]

at one point there was an attempt to make sequential system using AS60 or AZ60 variant of the 908 chip, but it died quick