Engine lugging boom
Engine lugging boom
(OP)
Could any one explain about the "Engine lugging boom" and its importance in NVH targets.
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RE: Engine lugging boom
Cheers
Greg Locock
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.
RE: Engine lugging boom
Thanks for your reply. I don’t work for the said dead man and in no way associated with his company. Any how I request you to through some light in generalized words.
Thanks.
RE: Engine lugging boom
There are several causes, and many cures.
Cheers
Greg Locock
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.
RE: Engine lugging boom
Is that associated with any specific mode shape? What are the considerations needed in terms NVH like engine mounting points.. etc.
Thanks.
RE: Engine lugging boom
It would be worse with a 4-cyl engine than with a V-8, for example, because of the lower frequencies at a given RPM.
Considerations?
One is to make sure that your exhaust system doesn't have a primary acoustic mode identical to a cabin acoustic mode.
Then you'd have something like the "Corvette boom" noise.
Another is make sure the powertrain in general and the exhaust in particular is well-isolated from body panels having low-frequency modes.
Another is to assure that items like a transmission support cross-member don't have resonances in undesirable operating frequency ranges. Early Jeep Grand Cherokee, for example.
Good luck