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Thrust cut off valve : Techniek

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Thrust cut off valve

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Thrust cut off valve

Berichtdoor Roadie666 » 12 feb 2022, 22:18

Hoi allen,

Op mijn zoektocht naar wat onderstaand vacuüm potje nou precies doet onder dat luchtfilter ban mijn 280SEL uit 83, kwam ik via hey onderdeel nummer bij bovenstaande omschrijving. Maar nu weet ik nog niks.
Feit is, als ik het op het luchtfilter aansluit slaat de motor af wn krijg ik hem niet meer aan. Kapot dus, dat ding. Maar wat doet het nou feitelijk?

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Re: Thrust cut off valve

Berichtdoor Leeflang » 12 feb 2022, 23:14

Zonder het onderdeelnummer en zonder foto is het wat lastig een goed antwoord te geven, temeer omdat de omschrijving niet in het werkplaatshandboek voorkomt.

Er is wel een "decel shutoff valve" (of "Schubabschaltventil" in het Duits), ik neem aan dat die bedoeld is.
Dat ding doet precies wat de omschrijving zegt, het sluit iets af bij het afremmen.
Dat "iets" is de brandstoftoevoer.

Het is een inrichting om brandstof te besparen, om af te remmen is geen benzine nodig.

Het werkt door de klep te openen, die is parallel aan de stuwschijf geplaatst, tussen luchtfilter en inlaatspruitstuk.
Als de klep geopend is, stroomt de lucht die de motor aanzuigt door de klep en niet meer langs de stuwschijf.
De stuwschijf blijft gesloten en daardoor krijgen de injectoren geen brandstof meer.
Om te voorkomen dat de motor af slaat als je (bijna) stil staat, werkt dat alleen boven 30 km/u en 1100 toeren.
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Re: Thrust cut off valve

Berichtdoor Roadie666 » 13 feb 2022, 09:53

Hoi, nou, daar wordt ik al iets wijzer van.
Onderdeelnummer is 0000941536 of 35, dT kan ik niet zo goed lezen.
Het,zou verklaren waarom de motor afslaat, het ding is gewoon kapot [IMG]https://uploads.tapatalk-cdn.com/20220213/c6a2e7cd8b864a5c0534bf5d27fd202f.jpg[/IMG]

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Re: Thrust cut off valve

Berichtdoor Leeflang » 13 feb 2022, 15:49

Het nummer zou 0000941565 moeten zijn.
Helaas lijkt die niet meer nieuw leverbaar bij Mercedes.
Bosch nummer 0 280 142 100 zou hetzelfde moeten zijn, maar ook daarvan lijkt de leverbaarheid problematisch.

Het zou kunnen zijn dat hij wel heel is, maar geopend wordt terwijl dat niet de bedoeling is.
Met het dunne slangetje er af getrokken, zou de klep continu gesloten moeten zijn en de motor moeten blijven lopen, alleen dan wel met een beetje meer verbruik.
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Re: Thrust cut off valve

Berichtdoor Roadie666 » 15 feb 2022, 18:43

Zit er dan een membraam in dat potje?

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Re: Thrust cut off valve

Berichtdoor Leeflang » 15 feb 2022, 22:49

Ja, hier is een kapotte (membraan gescheurd):
20200712145834gzkmu.png
Er is geen vervanger voor het membraan en repareren zal ook niet gaan, de behuizing kan niet zo geopend worden dat die ook weer gesloten kan worden.
Je hebt geen permissies om de bijlage(n)) in dit bericht te zien.
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Re: Thrust cut off valve

Berichtdoor Roadie666 » 16 feb 2022, 10:29

Oh, dan zie ik het al. Bij mij zit dye veer er niet eens meer in.....
Is waarschijnlijk onklaar gemaakt doordat mijn auto op gas gelopen heeft

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