|
Title: understanding kflbts TT225 apx(512ecu euro2) vs TT225 bam(1mb ecu euro3)/TT240 Post by: dantt on November 12, 2014, 01:44:52 PM hi,
i'm trying to understand how modify my kfbts on my TT tt 225 apx is much rich ! at hight load and hight rpm the values are smaller than 0.78 why? to keep egt low? in TT225 bam with ecological legislation more restrictive (euro3) is often 1; but in TT 240 those values, at hight load and hight rpm, are between 0.78 and 0.75 kflbts of TT240 seems a good configuration why audi don't use this configuration on old TT225 apx? apx is richest than TT240, why? can i use at hight load ,the TT240 kflbts configuration? Title: Re: understanding kflbts TT225 apx(512ecu euro2) vs TT225 bam(1mb ecu euro3)/TT240 Post by: bk56190 on November 13, 2014, 03:24:28 AM Hi,
Why audi don't use this configuration on old TT225 apx? apx is richest than TT240, why? : BAM and TT240 have an EGT sensor to protect the turbo in case of high EGT. EGT enrich There are two types of EGT enrich in ME7 -BTS (open loop) - when modeled EGT (block 034) reaches TABGBTS (500°C for the S4, 750°C for the RS4), the requested AFR tracks lambts if it is richer than lamfa. -ATR (closed loop) - when measured EGT (block 112) reaches TABGSS (980°C), ATR will add fuel via dlatr, which is generated by the ATR PID. => http://s4wiki.com/wiki/EGT So, APX doesn't have ATR module, only works with modeled EGT and fueling is very safe; Title: Re: understanding kflbts TT225 apx(512ecu euro2) vs TT225 bam(1mb ecu euro3)/TT240 Post by: dantt on November 13, 2014, 04:26:03 AM thanks for your replay,
in some forum i have read that on apx lambda sensor works different: 0.6 is lean, 0.7 0.8 is rich i'm lookin for "trust tutorial" Title: Re: understanding kflbts TT225 apx(512ecu euro2) vs TT225 bam(1mb ecu euro3)/TT240 Post by: dantt on November 13, 2014, 05:42:28 AM Hi, Why audi don't use this configuration on old TT225 apx? apx is richest than TT240, why? : BAM and TT240 have an EGT sensor to protect the turbo in case of high EGT. EGT enrich There are two types of EGT enrich in ME7 -BTS (open loop) - when modeled EGT (block 034) reaches TABGBTS (500°C for the S4, 750°C for the RS4), the requested AFR tracks lambts if it is richer than lamfa. -ATR (closed loop) - when measured EGT (block 112) reaches TABGSS (980°C), ATR will add fuel via dlatr, which is generated by the ATR PID. => http://s4wiki.com/wiki/EGT So, APX doesn't have ATR module, only works with modeled EGT and fueling is very safe; thanks for your explanation. I will not use configuration of TT240 kfbts :) Title: Re: understanding kflbts TT225 apx(512ecu euro2) vs TT225 bam(1mb ecu euro3)/TT240 Post by: fknbrkn on November 13, 2014, 06:14:39 AM apx has a narrowband o2 sensor
|