CES eth content sensor installed, flex fuel patch coming soon
#65
Evolving Member
http://www.patents.com/alcohol-conce...s-5400758.html
*The virtual sensor today--dang- I had a real good link where it discussed Ford's switch over and the methodology--lost now due to old age on the web- cannot find it. Now i get a 404 code- GRRRR
*This ionization method I do not believe made it to market;
http://www.faqs.org/patents/app/20100077834
#66
Yeah, I thought about using the fuel trims quite some time ago. In theory, it can work, but one thing that we could first need to fix is to make E85 AFRs insensitive to air temperature. Probably could be fixed with the global air density table, but would be better to have a separate table to handle it so load is not affected. At any rate, it probably is do-able, but I think we are better off using an ethanol content sensor.
#68
Evolved Member
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When you say, "use fuel trims", I assume that means using the narrow band sensor and the fuel trims to adjust idle and cruz. This I can understand. I'm not sure that would work out of the box. That should work assuming the trims has a broader range.
What I don't understand would be using trims for boosted load. How might that work? I presume it would require a wideband to be read by the ECU, correct? Could the ECU trim fast enough under acceleration?
What I don't understand would be using trims for boosted load. How might that work? I presume it would require a wideband to be read by the ECU, correct? Could the ECU trim fast enough under acceleration?
#69
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I still think the fuel trims probably work fine for factory flex fuel cars but wouldn't have the resolution or speed required for what we are looking for.
- Bryan
#74
Yeah, I'm interested too. Haven't posted anything. Its going to be a rewrite of the v7 boost code with changes to reflect what I think are important. Many of the features will remain. I just need to finish tuning a few people's cars, and then I'll be back to this.