I totally agree.EssEss wrote:Dynamic flow is no way related to this trick (or the knock sensor zip-tie trick). I spent some time on my own injector flowbench to prove it to a co-worker. Check this link for a little more insight: http://www.injectordynamics.com/dynamic ... ation.htmlAbeFM wrote:I have seen people monitor the current to the injector (which I kinda like - you can actually SEE the pintle stop moving).
this guy does it right, and I've independently verified it - most people don't go to this extent, except ford and myself . Every single injector I've characterized exhibits the same behavior around opening which a static straight-line interpolation misses. If you use big injectors and low duty the error turns out to be pretty big - especially if you didn't characterize it wrt battv.
And I wanted to add that the dead time is not only related to the opening but also closing time and that neither are step functions where you have no flow followed by full flow at the exact time the pintle has moved (or the reverse for closing). One more thing to take into consideration is that the driver used for the test also has an impact on the measurements so the best is to use the same driver circuits as those in the ECU or the actually use the ECU for the test.
Jean