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Drallkanal

English translation: swirl duct

GLOSSARY ENTRY (DERIVED FROM QUESTION BELOW)
German term or phrase:Drallkanal
English translation:swirl duct
Entered by: Kim Metzger

15:56 Mar 27, 2003
German to English translations [PRO]
Tech/Engineering
German term or phrase: Drallkanal
Ein neuer Einlasskrümmer verfügt über 2 unterschiedliche, voneinander getrennte Einlasskanäle je Zylinder, den Füllkanal mit Drallklappe und den Drallkanal.
shewid
Sweden
Local time: 23:14
swirl duct
Explanation:
Introducing the new common rail system, BMW is also launching other new developments such as micro-blind hole injection jets with optimised nozzles for enhanced combustion and, as a result, even cleaner emissions. On the six-cylinder power unit the modified geometry of the two intake ducts - the swirl duct and the tangential duct - provides a greater swirl effect at low engine speeds and loads and higher air throughput in the tangential duct at higher engine speeds. The tangential duct is disconnected under low load and at low engine speeds by way of a throttle butterfly in the intake manifold. Reducing the effective intake cross-section accordingly, this slows down air velocity in the swirl duct and helps to further reduce emissions. Together with the new combustion chamber geometry with a very wide and flat piston crown as well as the lower compression ratio, this provides an even better air/fuel mixture and a smoother combustion process.
Selected response from:

Kim Metzger
Mexico
Local time: 15:14
Grading comment
Thanks for the help
4 KudoZ points were awarded for this answer



Summary of answers provided
3 +1swirl duct
Kim Metzger


Discussion entries: 2





  

Answers


3 mins   confidence: Answerer confidence 3/5Answerer confidence 3/5 peer agreement (net): +1
swirl duct


Explanation:
Introducing the new common rail system, BMW is also launching other new developments such as micro-blind hole injection jets with optimised nozzles for enhanced combustion and, as a result, even cleaner emissions. On the six-cylinder power unit the modified geometry of the two intake ducts - the swirl duct and the tangential duct - provides a greater swirl effect at low engine speeds and loads and higher air throughput in the tangential duct at higher engine speeds. The tangential duct is disconnected under low load and at low engine speeds by way of a throttle butterfly in the intake manifold. Reducing the effective intake cross-section accordingly, this slows down air velocity in the swirl duct and helps to further reduce emissions. Together with the new combustion chamber geometry with a very wide and flat piston crown as well as the lower compression ratio, this provides an even better air/fuel mixture and a smoother combustion process.



    Reference: http://www.bmwnation.com/articles/e65_new7_diesel_01.html
Kim Metzger
Mexico
Local time: 15:14
Native speaker of: Native in EnglishEnglish
PRO pts in pair: 22192
Grading comment
Thanks for the help

Peer comments on this answer (and responses from the answerer)
agree  Johanna Timm, PhD: confirmed by Wyhlidal who also gives turbulence duct and whirl duct
36 mins
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