[rusEfi] Nissan engine KA24DE #36

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filip5
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Re: Nissan engine KA24DE #36

Post by filip5 »

I connected the TPS but I can not get the TPS to effect the fuel injection no matter what I do. I am on MAF operation under General tab.

TPS does not seem to effect the fuel injection. Do I need to go to some other operation to get it to work ? I need to be on MAF only.
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Re: Nissan engine KA24DE #36

Post by AndreyB »

Do you see TPS gauge working? A few messages ago you've asked and I've provided my tune. Here's a the TPS enrichment table from my tune.
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Re: Nissan engine KA24DE #36

Post by filip5 »

Yes, TPS gauge is working and I used the same exact values that you posted here. I tried this in the car to no sucess. I am trying it now here in my test bench to see if I can get it to effect injection.

I will post a video and the data logs shortly. Before I could not get TPS to do anything but now that I used your exact 2 tables posted, TPS seem just to effect the fuel injection time
only after the threshold of TPS that is 80% and that in a wrong way because it is lowering it.
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Re: Nissan engine KA24DE #36

Post by AndreyB »

Maybe lower your "TPS accel threshold"? Anyway, let's see your tune and logs! :)
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Re: Nissan engine KA24DE #36

Post by filip5 »

Video in:
[video]https://youtu.be/XaZOvi6ig1Q[/video]

data logs is of today : 2017-06-15_21.21.43
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Re: Nissan engine KA24DE #36

Post by AndreyB »

Your simulation unfortunatelly is too far from reality - you are moving TPS pretty slowly, as you see on the logs your "TPS change" is below 10. Your "TPS change" is below 10 it is always below "TPS acceleration enrichment" which is 40.

Please re-calibrate your potentiometer so that you can move TPS much, much faster. Please set your "TPS acceleration enrichment" to zero while testing on a bench.
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Re: Nissan engine KA24DE #36

Post by AndreyB »

Sorry here's the picture.
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Re: Nissan engine KA24DE #36

Post by filip5 »

This seem to have fixed it now. TPS is effecting fuel injection. Video in:
[video]https://youtu.be/vkf9snPOSZs[/video]

attached is the datalog as well.

Thanks for the help. This was my last issue to have this car run properly . I will try tomorrow in the real car and see how it will respond and let you know.

I hope it will solve the problem.
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Re: Nissan engine KA24DE #36

Post by filip5 »

I connected TPs and calibrated it. It does seem to work much better now and the engine is no longer chocking on acceleration as it used to. It is not 100% yet but I would say is very close to it.
It may require some more fine tuning but I can drive this car now.

I just get thie "errors duty" on display but that does not seem to effect the rusefi operation.

Attached is the Mycar9 project with datalogs of the today's test that show how it performed in instant acceleration. It is pretty good.

https://youtu.be/4OvWYw4szpI

I could not open this file on google chrome but it works fine on firefox.
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Re: Nissan engine KA24DE #36

Post by filip5 »

My Nissan Altima is now running on Rusefi. Today i did some more calibration and it seems to run just fine. Attached is Mycar11 project with 2 datalogs that show how well the MAF responded to the TPS sudden acceleration. It still shows as running lean when the sudden acceleration occurs but I guess that is probably an issue maybe for everybody including manufacturers of cars.

Project 11 attached. The problem with *Errors Duty seem to be related to the micro controller board. It did not effect the operation of rusefi it just displayed the error in the display but the rusefi run the engine fine.
I replaced it with another one and now the problem is not there anymore.

Video in:
https://www.youtube.com/watch?v=OyHe1LyXrYg
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Re: Nissan engine KA24DE #36

Post by filip5 »

I am trying to fine tune the ignition table. I am running on MAF and TPS for sudden acceleration. The question is what defines the "engine load" in the ignition table? It does not seem to be MAF, TPS or MAP. Anybody knows how to tie engine load to the ignition table?

I was looking at the ignition table and my starting point was 650rpm and let say 0% load at which point the table had an advance ignition of about 7 degrees,but the advance ignition in gauge on TS was showing 10 degrees just about.

So I was not sure where Rusefi was getting that value and passing it into TS. After tinkering with this a little bit as the video below shows I found out that there is not relation of so called engine load to any of the variables TPS, MAF or MAP at all. It looks like the engine value is just a concept related to the ignition table but has no meaning at all above the bottom line of the ignition table. It applies to the first lower horizontal line only which one can call it anything, 0%, 10% or whatever.

All other values above this bottom horizontal line have no effect or use at all so one should not bother setting them.

I just am not sure why Rusefi would add 3 more degrees to the ignition table arbitrarily though.

https://youtu.be/JoXU3NEmOf8

PS: Maybe Rusefi should look at the Fuel Table when MAF is used and VE table or MAP when MAP is used and describe the load on ignition table same way. It would make sense to have less advance on full load and more advance in less load for the same rpm and the ignition table would be entirely functional.
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Re: Nissan engine KA24DE #36

Post by AndreyB »

Your engine load axle scale needs to be scaled. Your MAF voltage values are between 0 and 5 volts, while your axle currently looks like 0-10-20-30-etc - looks to be set for MAP scale.

As for 3 degrees of additional timing I think it's "ignition intake air temp correction" you can set the whole table to zero if you want,

Looks like you are making some progress on your tune!
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Re: Nissan engine KA24DE #36

Post by kb1gtt »

Very nice method of air cooling your laptop.
Welcome to the friendlier side of internet crazy :)
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Re: Nissan engine KA24DE #36

Post by AndreyB »

Just made a tiny usability improvemen to the TS project definition file - fuel table and ignition table maps both would have label text change depending on your fuel algorith selection while creating project. So instead of "engine load" it would read "MAFValue" if you select "plain maf" while creating project
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Re: Nissan engine KA24DE #36

Post by filip5 »

Question about Idle operation on Rusefi. Is the idle vale controlling the idle operation at a min set RPM. The idle load could change when such condition change: air condition startup, steering wheel movement, lights, radiator fan, shifting from park to drive etc.

I wanted to ask if is there a set value for the idle rpm to be maintained at which setting the idle valve and fuel injection would try to maintain this minimal RPM setting despite the load change and how does it accomplish it?

I am monitoring the idle valve pin but I do not see any change on it when other variables mentioned above change.

PS: After I did some more testing I am able to set the min RPM and have some idle valve adjustment voltage which varies from 1.3 volts to as low as 0.327 volts when rpm increase. The drop is very slow. It takes about 30 sec to have the voltage drop from 1.3 volts to 0.327.

Can someone recommend the basic values for idle P, idle I, idle D and idle Offset Value so I can get faster response?
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Re: Nissan engine KA24DE #36

Post by AndreyB »

filip5 wrote:Can someone recommend the basic values for idle P, idle I, idle D and idle Offset Value so I can get faster response?
I cannot - IDLE pid implementation is pretty much brand new and potentially more code changes are required. Realistically only "manual" idle mode is functional at this point.

Still on vacation for a few more days, will be back soon,
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Re: Nissan engine KA24DE #36

Post by filip5 »

Ok. That would be the last thing to have an engine run on Rusefi completely.
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Re: Nissan engine KA24DE #36

Post by matt »

I wonder what ignition coil you're running. Standard Nissan single coil or individual?
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Re: Nissan engine KA24DE #36

Post by filip5 »

Individual coils. To use nissan original coil you would need to have a high voltage driver for the nissan coil.
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