Fuel injection timer

[carioux2008]

Hey guys, what are your thoughts on a SIMPLE fuel injection timer based on throttle position and RPM. As RPM and/or throttle position increased, the clock frequency of a 555 timer or similar circuit would increase to increase the amount of fuel being fed into a small engine. Im just not sure that I would be able to model this on the computer before I tried it practically. What programs could I use to do this that is easier to use than Circuit Maker 2000 Pro?

 

[Robin2]

It will also have to be closely linked to crankshaft position, and the relationship to crank position has to vary with RPM - which, I suspect, will remove "simple" from the project.

 

[alec_t]

The width of the pulse used to energise the injector is a main factor determining the amount of fuel per revolution. As Robin2 indicates, the pulse timing is all-important too. There is no simple timer for this.

What programs could I use to do this that is easier to use than Circuit Maker 2000 Pro?

LTSpice is pretty capable for sims, but not having used C M 2000 I couldn't say if it's easier to use.

 

[KeepItSimpleStupid]

Psst!

Look here: https://www.greencarcongress.com/2009/08/freescale-small-20090827.html