Originally posted by zakspeed
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Erään tuollaisen linjavalmistajan spekseihin nähden teho on "tontilla"
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Jos ja kun tuollainen lämmityskaapeli vaihdetaan niin päivitetäänkö samalla SCR-ohjaimen softa? Muistan joskus lukeneeni että lämmitystehoa on jouduttu ainakin alkuajoista lisäämään jäätymisongelmien takia softapäivityksessä.
Mitähän tuo aktiivipytyn sulatusvastus vie tehoa? edit näyttää vievän ainakin X5 ja 3-sarjassa jotakuinkin 65W (2,2 Ohm resistanssi), tämä lienee muissakin jotain samaa luokkaa: https://xemodex.com/us/pdf/BMW%20SCR...ow%20Chart.pdf
Todellisuudessa siis tuo pytty ei sula koskaan yli 11 asteen pakkasessa tuollaisilla tehoilla vaan vastus riittää juuri siihen että jääkalikasta saadaan tiristettyä sen verran tavaraa irti että koko järjestelmä pysyy päällä. Näyttää myös että talvella tuo neste on riittoisampaa kun paikat on jäässä... Näyttää nimittäin että tuo lämmittelee jo -15 asteessa pyttyä 20min ennen ensimmäistäkään suihkausta... -25 asteessa jo 45min...
Active tank heater
The active tank heater is integrated in the SCR delivery module. The tank heater is also activated by the SCR control unit through the 6-pin plug connection. AdBlue freezes at -11 °C.
After the following maximum heating periods, enough AdBlue must have been thawed in order to guarantee sustained injection:
-15°C: 20 minutes
-25°C: 45 minutes
The delivery rate is restricted to 150 g/h when the active tank is frozen. A higher delivery rate endangers the sustained withdrawal of liquid AdBlue from the active tank and could cause a malfunction in the SCR system.
Pressure line heating
An additional heating element is located at the start of the pressure line. This heating element is also activated by the SCR control unit. It too contributes to keeping the AdBlue in a liquid state. The SCR control unit also activates the heating for the pressure line.
The active tank heater is integrated in the SCR delivery module. The tank heater is also activated by the SCR control unit through the 6-pin plug connection. AdBlue freezes at -11 °C.
After the following maximum heating periods, enough AdBlue must have been thawed in order to guarantee sustained injection:
-15°C: 20 minutes
-25°C: 45 minutes
The delivery rate is restricted to 150 g/h when the active tank is frozen. A higher delivery rate endangers the sustained withdrawal of liquid AdBlue from the active tank and could cause a malfunction in the SCR system.
Pressure line heating
An additional heating element is located at the start of the pressure line. This heating element is also activated by the SCR control unit. It too contributes to keeping the AdBlue in a liquid state. The SCR control unit also activates the heating for the pressure line.
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edit. eri koppien resistanssit:
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