Live Auto Tune!



Understanding Live Auto Tune

Overview:

There are mixed viewpoints of auto tune type functions, but in reality a well designed autotune based on analyzing data with a computer will just do a better job that a human can. There is a big if to this.... The Auto tune needs to consider all the factors a knowledgeable human would. Most auto tunes are overly simplistic and don't consider all the factors a knowledgeable human would. This approach can get you started but will never do a better job. Auto Tune looks at all the key factors that I do after 25 years of tuning with the manual approach. However, My human brain can not hold thousands of data points at once and produce the statistical averages :) This is a huge advantage. Auto Tune successfully implements this tuning knowledge with the capabilities of the computer to produce automated tuning unmatched by any other program available for aftermarket EFI controllers. When Live Auto Tune is configure properly and working right it should do a better job than you can. The places for manual intervention would be to alter cells with no data and perhaps some smoothing. I do have a plan for applying the same logic I do in these cases too.


Primary Controls:

Recommended Table:

This is the primary table being operated on. As the recommended values change from the original value, the numbers color will change to blue if the value is richer, and red if it has been made leaner.
ToolTip - Pay attention to the tooltips, there is a good deal of useful information for the specific cell you hover over: Cell Locking - You can lock cells so they will not be altered by Auto Tune by selecting them, then right click, select Lock Selected Cells. To unlock them, select the locked cells you want to unlock, right click and select Unlock Selected Cells


Heat Maps:


Advanced Settings:


The advanced settings are all defaulted to reasonable values, but give you the opportunity to adjust important operating parameters of Auto Tune Live! There are 3 key sections in the Advanced Settings:
Authority Limits: Filters: Reference Tables:
Lambda Delay:


As with all sensors, the lambda sensor can only read and report a measured variable, in doing this there will be a delay. For a Lambda sensor the primary delay comes from 2 factors: The Lambda Delay table is defines the latency between a change to AFR and the EGO sensor reflecting that change.



Using Auto Tune Live:
Operation of Auto Tune should be relatively straight forward. Within this help manual there are a number of additional settings explained, however for most applications the default values are best for initial tuning and will work very well there after. If you are using multiple fuel tables for dual table or table switching, make sure the secondary table is assigned to the correct EGO sensor. By default VE Table 2 is assigned to O2 Sensor 2 for most firmwares.
Common steps to operating:

1) Start vehicle and bring up to normal operating temperature. While below the temperature set in Advanced Controls, all data will be filtered.

2) For the first usage, it is recommended that you leave "Update Controller" unchecked. This will give you the opportunity to review the changes that Auto Tune made and insure things are set up correctly before applying the recommended settings. Once you know things are operating correctly, you should be able to leave this checked for normal driving. Under heavy throttle or boost conditions, the safer approach is to leave this uncheck always.

3) Click "Start Auto Tune" - This should begin providing updates to the recommended settings at once. If you do no see updates occurring, check Auto Tune Stats - Active Filter field, this displays any active filter so you can better under stand what condition is causing the data to be filtered. Common filters would be during warm up, or if you see O2 out of range check to make sure you O2 sensor is providing active data.

4) Begin driving the vehicle around. The goal is to collect enough data for all parts of the fuel table to give you accurate results. Have someone ride with you to use the "Cell Weighting" Heat map as a guide. Ideally you want to get all sections of the table within driving range to a green state. That means that Auto Tune has gotten significant usable data for that section.

5) When you have driven enough to collect data on the sections of the table you wanted to get tuned, stop. If the results do not give cause for concern click "Send" then Burn or just Burn before powering down the controller by turning off the vehicle. This will insure the corrections are saved to the controller.


You may notice some cycling of values from one session to another. This is normal as there is are going to be some changes to conditions, so unless all corrective factors are set to an ideal state, the perfect fuel table value will be slightly different.

An important consideration is always the AFR target table. By default the same one the controller uses is selected. You can change the targe table or use a custom AFR table that is the same size as the fuel table if you want. If using a wideband EGO, it is recommended that the same table is used as the controller uses during operation. On a narrow band setup, the controllers table would not be used by the controller and may not be setup. In this case the custom table is more desirable. Which ever table you prefer, the important part is to validate that the target AFR table is configured correctly.
Note: Auto Tune was designed to use with controller settings left as you would normally drive the car. Typically it is recommended that Accel Enrichment and and ego correction settings are left on unless you do not use them under normal circumstances.


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