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Moderátori: alfi666, BinKooL, fox1k
Boost Pressure Control DDE 3.0
A turbocharger with variable turbine geometry and without a wastegate is used for boost pressure control. It is operated by means of an adjustment lever on the turbine housing. The adjustment lever is connected by means of a control rod to the vacuum unit on the turbocharger such that the control rod is extended and retracted corresponding to the vacuum applied.
Components
Turbocharger with variable turbine geometry
Vacuum unit with control rod
Pressure converter
Function
The pressure converter links the vacuum unit with the vacuum supply by means of hoses and, depending on the activation status, it switches a variable vacuum to the vacuum unit controlled by the DDE control unit. In this way, the control rod is set in the required position. The pressure converter is activated by a square-wave signal with duty factors (= variable pulse width) between 5 and 95 %.
Checking variable turbine geometry
Maximum stroke of control rod: 10 mm
The control rod must be fully RETRACTED (= maximum boost pressure) at 650 mbar vacuum applied at the vacuum unit.
The control rod must be fully EXTENDED (= minimum boost pressure) at 0 mbar vacuum applied at the vacuum unit.
Troubleshooting
Fault code 65 "turbocharger control" is stored in the event of impermissible control deviation or fault "short/open circuit in pressure converter activation".
Consequences:
Boost pressure control is deactivated
Exhaust gas recirculation is deactivated
The injection volume is limited to 25 mg/stroke in the event of negative control deviation in the boost pressure
Boost pressure control is also deactivated if following faults occur:
Fault code 06: Exhaust gas recirculation (positive control deviation)
Fault code 36: Boost pressure sensor
MGSnake napísal:A teraz ma napadlo kedze bola prasknuta nadobka vakua, tak mozno RJ uviedla motor do nudzoveho rezimu lebo nebolo potrebne vakuum na naklapanie lopatok, teraz ked som to poriesil tak by mozno stacilo fakt vymazat chyby z RJ a mozno by to slo co vy na to???
zhmp napísal:
NO alfi tak to by potom znamenalo,že tých nadstavení lopatiek je viac......ako by potom ta jednotka vedela ako na ako dlho otvorit ten elektroventil,ved nemá na turbe žiadne meracie zariadenie, čo by jej to dalo vediet...potenciometer alebo tak.....mna táto téma dost zaujíma nakolko ešte ja čakám na všetky možné špekulácie aby som mohol ja dať do poriadku svoje auto.....ja som niekedy na kamošovom aute meral to napetie,ale ani za boha si neviem spomenuť aké tam bolo.,...((((((......ja napríklad stále jazdím z odpojeným elektorventilom.....lebo ked ho pripojím auto vobec nejde........ked je odpojený tak auto je lenivejšie do 2300 otačok ale potom šlaha do sedadla......moj pocit je to že budem mat rozhodené to tiahlo na turbe ako som už dávnejšie písal.........
Boost pressure Sensor DDE 3.0
The boost pressure sensor registers the absolute pressure (boost pressure and atmospheric pressure together) in the exhaust system and serves as a measured value generator or boost pressure control.
The boost pressure sensor is mounted directly on the intake air manifold and sealed off with an O-ring. The DDE control unit supplies the sensor with ground (M_LDF) and a supply voltage of 5 V (U_LDF).
The pressure is picked up by a hole in the sensor and a corresponding measurement voltage (A_LDF) is sent to the DDE control unit).
Troubleshooting
If the boost pressure sensor is defective, fault code 36 "boost pressure control" is stored,
exhaust gas recirculation is deactivated and
boost pressure control is deactivated
alfi666 napísal:
Ano pamatam si, ze minule si spominal, ze to ma len 2 polohy - otvorene alebo zatvorene.. ale takto ked som pozrel WDS to tak nevyzera
A meracie zariadenie ma auto - ma pressure senzor a ten sa nachadza v sani.. diel cislo 16
http://bmwfans.info/original/E46/Lim/32 ... l-11_3327/
Este dodam popis z WDS:Kód: Vybrať všetkoBoost pressure Sensor DDE 3.0
The boost pressure sensor registers the absolute pressure (boost pressure and atmospheric pressure together) in the exhaust system and serves as a measured value generator or boost pressure control.
The boost pressure sensor is mounted directly on the intake air manifold and sealed off with an O-ring. The DDE control unit supplies the sensor with ground (M_LDF) and a supply voltage of 5 V (U_LDF).
The pressure is picked up by a hole in the sensor and a corresponding measurement voltage (A_LDF) is sent to the DDE control unit).
Troubleshooting
If the boost pressure sensor is defective, fault code 36 "boost pressure control" is stored,
exhaust gas recirculation is deactivated and
boost pressure control is deactivated
zhmp napísal:To meria tlak z turba v sacom,nie?? Takže to ten senzor by vlastne ovplyvnoval činnost elektorventilu??kolko spalin ma turbo do sacieho pustit???podla teba???![]()
alfi666 napísal:
No pozri.. ja tomu rozumiem tak, ze rozne velky tlak vytvara turbo tym, ze sa naklapaju roznym pomerom lopatky....no a tym je mozne dosiahnut rozneho tlaku pri roznych otackach motora - je mozne znizit tlak keby turbo tlacilo prilis vela vo vyssich, pripadne je mozne zvysit tlak pri nizkych otackach, tym, ze sa viac vyfukovych spalin pusti medzi vyfukove lopatky turba...
No elektroventil urcite nastavuje DDE jednotka... a jednym z udajov je urcite aj tlak turba - a ten ma z tohto senzoru ktory je v sani... ovsem turbo nepusta spaliny do sania - cize turbo ich tam nema pustit ziadne.... tie sa tam dostanu len cez EGR ventil
zhmp napísal:Počkaj takže turbo tlačí iba čistý vzduch??? No mne sa zdá že turbo tlačí časť výfukových plynov a časť čistého vzduchu...veď o tom je turbo....nieeee,?? Preto tam je aj intercooler na ochladzovanie výfukovych plynov..alebo sa mýlim alfi???
zhmp napísal:
Beriem speť alfi......turbo tlači len čistý vzduch!!!!!!!
http://sk.wikipedia.org/wiki/Turbod%C3%BAchadlo
alfi666 napísal:
Nieee :)))) hehehe... tak toto by som od teba necakal.. si robis srandu?![]()
No... ako ti to vysvetlit :).... vyfukove plyny svojim prudenim pohanaju vrtulky ktora je vo vyfukovom slimakovi....... a ta je oskou prepojena na podobnu vrtulku ktora je v sacom slimakovi :)
No.. ale ti jednotlivy slimaci spolu niesu prepojeny.... proste - turbo vyuziva energiu vyfukovych plynov na roztocenie tej vrtulky ktora je v sacom slimakovi
A intercooler je tam nato aby sa ochladil vzduch ktory presiel cez turbo, kedze turbo je pocas cinnosti dost horuca suciastka - preto sa odporuca aj dochladzovanie