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> Long Term Fuel Trim, STFT, Double Richness Loop, CAN CLiP record LTFT is fixed at 31.25% STFT wild

gastorro
post 3 Sep 2018, 19:13
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Ce inseamna starea ET056 - 'DOUBLE RICHNESS LOOP' in softul CLiP ?
Stiu ce inseamna 'closed loop' la masini { ECU corecteaza permanent* raportul de oxigen/benzina incercand sa-l tina in jurul a 14,7/1 ,
raport la care senzorul de oxigen (pre-cat) scoate 0.45V }; dar double closed loop? (sa includa oare si senzorul post-cat?)

Nu gasesc ( in CLiP ) factorii LTFT si STFT ; au alte denumiri ?

De ex. cand folosesc un OBD2 simplu (ELM327 Bluetooth), LTFT si STFT apar in lista..
dar imi arata ca 'LONG TERM FUEL TRIM' este foarte mare ( 35.1% ) si cam fix ?(si STFT variaza uneori cu +/-35%)
(am stat cu ochii pe el o ora (prin ELM327) pe auto-band si nu s-a schimbat)

Am inregistrat cu clona mea CAN CLiP 10 pid-uri timp de un minut (vezi poza de mai jos)
Rog sfatul batranilor de aici sa ma ajute sa descoperim daca am vreo problema.... (pompa de benzina sau aer fals sau senzori)
Sandero_OBDII_charts.png
Vezi graficul/poza in toata amploarea lui aici

This post has been edited by gastorro: 3 Sep 2018, 19:22


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RazvanF
post 3 Sep 2018, 20:04
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Daca ai timp vezi aici https://www.youtube.com/watch?v=uboSWAWXeBk
Poti gasi raspunsuri bune cand vine vorba de senzorii lamba, combustibil si altele.


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Renault Clio II Bicorp 2006 Autentique 1.5 dCi 68 cp
Dacia Logan MCV Stepway 2017 Prestige 1.5 dCi 90 cp X52
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einstein1984
post 4 Sep 2018, 07:52
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et056 insemana ca functioneaza cu bucla de feedback pt imbogatire de la sonda labda sau nu.


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gastorro
post 4 Sep 2018, 14:58
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Desi Sandero asta are un ECU Sirius , daca softul lui seamna cu ala din Megane-uri (ECU Sagem S3000)
poate decodam ce intelege Renault prin 'DOUBLE RICHNESS LOOP' , din manualul lor 17B-PETROL INJECTION:
Adaptive richness correction (Megane2):
The 'Richness Correction' value ( PR138 ) is close to 50% (in cazul unui motor bun), with limits of 0 and 100 %.
The 'Self-adapting Richness Gain' ( PR143 ) and 'Self-adapting Richness Offset' ( PR144 ) are used to offset the injection mapping to centre richness regulation to that desired 50%.
Adaptive corrections take 50% as an average value after computer initialisation (clearing the programming)
The 'Upstream O2 Sensor Heating' ( ET052 ) can become ACTIVE only when the engine is running; however, heating is disabled above 140 km/h or when the engine is under load (atunci definiti 'load' !).
The downstream sensor is also used for richness regulation via the double loop program. When in 'double loop', the downstream sensor is used to compensate for the drift of the upstream sensor.
For the 'Double Richness Loop' ( ET056 ) to get ACTIVE, the vehicle must be driven with the engine warm for about 90 seconds, in the absence of load.
The downstream sensor is also heated, but the heating doesn't start immediately after the engine starts... The 'Downstream O2 Sensor Heating' ( ET053 ) gets ACTIVE after a time that depends upon the coolant temperature, with the engine running and in the absence of load. The heating of the downstream sensor is deactivated under 140km/h or when the engine is under load.
Renault uses different ways to power the heaters of these sensors:
● for BOSCH LSH-25 or NTK 6L (6Ω) or DELPHI AFS128 (3 wires) - with a simple DC 12v.
● for BOSCH LSF-4.7 (known as PLANAR) - in the first 20s after start, through 12v pulses with 50% 'duty cycle' at 20Hz ; after that it gets DC 12v
● for BOSCH (???) or NTK 6L (3.3Ω) - in the first 15s after start, with DC 12v ; after that, ECU feeds it with 12v pulses , 50% 'duty cycle' @ 20Hz
Senzorii de pe Dacia mea sunt:
1) UpStream cod_Dialogys: 8200650085 = BOSCH 0258006990 ( Type formula LSF-4.2 | Trade abbrev(HKB) LS 6990 | Universal product 0258986602 | length 492mm | 4 wires )
2) DownStream cod_Dialogys: 8200437489 = BOSCH 0258006791 ( Type formula LSF-4.2 | Trade abbrev(HKB) LS 6791 | Universal product 0258986602 | length 480mm | 4 wires )

This post has been edited by gastorro: 5 Sep 2018, 10:00


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einstein1984
post 5 Sep 2018, 07:48
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load = sarcina


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gastorro
post 6 Sep 2018, 22:54
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Din graficele urmatoare, observam mai intai ca ECU stie ca pedala (PR568 si PR569) poate varia doar intre 14,43% si 81,12% (si nu intre 0 si 100% cum ne-am astepta..); probabil ca cursoarele potentiometrului nu pot ajunge chiar pana la capetele pistelor lor de carbon. Observam ca clapeta de aer ( PR118 si PR119 ) reflecta pedala intr-o plaja un pic mai mare (intre 14% si 83,6% fata de 14,43% si 81,12%) ; rezulta ca corelarea se face printr-un coeficient. Ok, dar de ce pozitia clapetei din peroada 9s...10s nu reflecta realitatea pedalei care era deja la minim ? (masina a stationat la relanti in astea 10 secunde, cu exceptia acelui rev pana la podea de la 8s) Sa fi tras oare vacumul din admisie de ea? Aproape de momentul 3s, PR429 este vizibil intarziat fata de restul; cat de rapid reactioneaza motorasul ala? De ce ECU a simtit un pic de pedala intre 3s si 6s daca eu n-am apasat-o ? Sa fie ceva legat de ventilator? (caci l-am auzit un pic); daca era o corectie de relanti din cauza unui consumator (ca ventilatorul), s-ar fi vazut doar pe clapeta dar asta se vede chiar pe cursoare !? (PR568 si PR569) Sa fi incercat ECU sa corecteze consumul ventilatorului direct din alternator (desi nu are bias extern) iar ala a crescut tensiunea generala atat de mult incat a devenit sesizabil pe potentiometru ? Dar atunci inseamna ca potentiometrul asta (si altele..) n-au parte de tensiuni de referinta stabilizate? (n-au zenere de 5v1 pe ele?). Nu cred ca inginerii n-au luat masuri impotriva variatiilor de tensiune. Si atunci ce este cocoasa aia?
gas_pedal_trottle_synchronized_charts_Dacia_Sandero_Hi_Flex_2009_1_6_L_8v_K7_M_C
AN_CLi_P.png


This post has been edited by gastorro: 6 Sep 2018, 23:58


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einstein1984
post 7 Sep 2018, 07:04
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dvs aveti clapeta actionata de o sarma, sarm care mai agata sau de la uzura parghiilor de actionare mai ramane putin in WOT dupa eliberarea pedalei


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gastorro
post 8 Sep 2018, 20:40
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Dacia asta nu-i 'pe cablu' .., are VDO brazilian ! (aspectul asta reiese si din grafic)
VDO_Renault_H8200687288_8200647826_Made_in_Brazil_b.jpg VDO_Renault_H8200687288_8200647826_Made_in_Brazil_a.jpg VDO_Renault_H8200687288_8200647826_Made_in_Brazil_c.jpg

This post has been edited by gastorro: 8 Sep 2018, 20:49


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