English translation: order (in context of harmonics)
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German to English translations [PRO] Tech/Engineering - Mechanics / Mech Engineering
German term or phrase:Ordnung
In a test report (noise):
"Das Sonogramm des Flüssigkeitsschalls zeigt deutlich die Frequenzen der Pumpe (12. Ordnung der Motordrehzahl).
I don't understand the meaning of "12. Odnung der Motordrehzahl".
Thank you for your help!
Explanation: 12th order harmonic. i.e. twelve times the fundamental frequency
foehnerk Local time: 00:45 Works in field Native speaker of: English PRO pts in category: 38
5 mins confidence:
Explanation: Motordrehzahl is engine speed, rpm (Langenscheidt Technik).
I'm not an automotive specialist, but I found this explanation that might help.
After your road test, park the vehicle and bring the engine speed up to the same speed that it was vibrating at on the road test. If the vibration is present, record the Vibration RPM and Engine RPM on the vibration worksheet. Mark the point on the vibration worksheet where your Vibration RPM and your Engine RPM readings intersect. The point of intersection should be on or near a vibration line on the vibration worksheet. Each line is identified with an abbreviation like E1. E1 represents a first order engine speed related vibration.
Order The number of disturbances or shakes in one revolution of a rotating component.