This would be correct. I may try the DLG-1 if I can get someone at Innovate to answer the dang phone.
Last edited by lowkey; 02-20-2017 at 02:18 AM.
One of the first discussion we had in the begining of this post was about the relevance of the EGO correction numbers in the open loop cells of the map. AZ also explained that EGO was still "there", it was just a matter of the ECM discarding it while in open loop.
However, I have just realized that this info is perhaps wrong. At least that is what I just figured while playing back my last fridayīs datalog.
Iīll try to explain you what I saw but itīs quite difficult to me as a non native speaker of english. Iīll do my best.
Check below one screeshot of the datalog, a window that show EGO correction in black, TPS load in blue, RPM in red:
As you can see, TPS is at 212 and climbing...one 1 second later and it goes all the way up to 255 (max). Take a look what happens to EGO from that point on. It "freezes" at 96.900, which was the last correction applied before the WOT condition. And what happens on the History Tables, which we use to apply corrections to the map? Check below:
The 96.900 EGO correction populates the History Table and make us believe the ECM was truly applying this correction at that time, which is not true. It just repeats the 96.900 value because it was the last example of EGO available, but in fact EGO is clearly unavailable at that time.
This made me realize that tuning based on EGO is definetely worth only inside closed loop and absolutely worthless for the open loop. It does not give any idea on what is trully going on there.
And just to give some more subsidies to our discussion regardind the o2 sensor, look what the stock narrow band showed during that exact same time, while EGO freezed at 96.900:
o2 voltage, in red, kept quite steady at around 0.7-0.8v while TPS was full at 255.
And the official answer from innovate is.... NO. No simulated narrow band output at all from the DLG-1 and also, none of their products are weather resistant. Guess I will be looking elsewhere.
Bought another Wego-3 dual wideband today with a remote waterproof display. Pics to follow in a few weeks or so.
Also I found some very good info from this link http://www.buellxb.com/forum/showthr...-tunning/page8 specifically the first post and page 8. I know you have read over the tuning guide but there is some really good info in there as well. http://www.ecmspy.com/tgv2/guide2.shtml#7.%20Methods The theory in the tuning guide states that if 100% fueling is met this is equal to 14.7:1 AFR's which is the target for the narrow band / closed loop. When open loop is triggered the value goes to 105% with an AFR value of 14.0:1 and WOT is a value of 110% which is 13.5:1 AFR. Also interesting is the narrow band voltage graph in the tuning guide is similar to the one I posted a few posts back except the value for stoich is an almost vertical line (also indicating there is no value adjustment to play with target AFR), you will see this in the linked tuning guide. Most of this info is in the appendix portion.
Also Have a look at this info explaining how the ECU uses closed loop learn to calculate open loop fueling as well as open loop looking at AFV value and NOT the EGO value to make adjustments.
184.108.40.206 Closed Loop Learn
The Closed Loop Learn region is a subset of the Closed Loop region and is where the global correction, the AFV, is calculated to account for all other uncertainties not addressed, these may include; ambient pressure and sensor deterioration. The Closed Loop Learn region occurs at about 40 70mph with a steady throttle and is shown in Figure 6.
The fuel is metered the same as in the Closed Loop region, except after 23 iterations of a difference between EGO and AFV, the AFV is reset to equal the EGO correction. Note that the AFV is only calculated in this region when the engine temperature is between [ Calibration Mode Maximum Engine Temperature ] and [ Calibration Mode Minimum Engine Temperature ], see section 18.
Top of Section
220.127.116.11 Open Loop
Open Loop operation occurs outside the Closed Loop and Closed Loop Idle regions, see Figure 6.
Open Loop fuel is metered as in Closed Loop, substituting the AFV instead of EGO correction and applying an open loop factor, [ Open Loop Default Correction ].
The Open Loop region covers the TPS and RPM which are encountered during a transition from Closed Loop to Open Loop WOT and during deceleration. For the former, the AFR needs to provide a smooth transition to WOT and for the latter, the AFR needs to be very lean to ensure the engine returns to idle quickly, to increase the engine braking effect and to reduce the chance of popping and banging in the exhaust.
18.104.22.168 Open Loop Learn Function
A neat little ECM function is the Open Loop Learn.
This uses the O2 sensor to detect rich or lean running conditions and operates in two ways:
If, during a decel, the ECM detects a rich mixture, the AFV is temporarily reduced.
If, at WOT, the ECM detects a lean mixture, the AFV is temporarily increased. This is shown clearly in Figure 7.
For decel operation, the following parameters are applicable:
[ Deceleration Learn Maximum RPM ]
Upper RPM for Open Loop Learn (decel)
[ Deceleration Learn Minimum RPM ]
Lower RPM for Open Loop Learn (decel)
[ Deceleration Learn Minimum Duration ]
Minimum number of cam revs for validity
[ Deceleration Learn Minimum Readings ]
Number of decels where mixture measured as rich before AFV is reduced
For WOT operation, if the mixture is lean, the AFV is increased. The following parameter is applicable:
[ Open Loop Enrichment Delay ]
Time at which mixture is lean before increasing AFV
This function can be enabled/disabled through the [ System Configuration ] Byte, see Figure 8.
Check corresponding figures 6 and 7 for great visual to go along with this data.