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Old 06-24-2009, 08:51 AM
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Stupid question...

Why do diesels sounds the way they do (clatter)?

B.
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Old 06-24-2009, 08:54 AM
Rob Rob is offline
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i heard it was from the high compression ratio that creates the knocking sound. but that is just what i heard, maybe a tech will chime in and give a good/correct answer.
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Old 06-24-2009, 08:57 AM
Rob Rob is offline
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here ya go... maybe this will help.

Diesel engine - Wikipedia, the free encyclopedia
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Old 06-24-2009, 09:00 AM
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believe it or not we had to learn this answer to pass the ag mechanics tech school i went to....the state required that you know this.....

what we were told is there is several reasons.....
1.) compression
2.) vlave and piston size
3.) timing of injection to vavles...
4.)
5.)

well i dont remeber 4,or 5 but there was like 10 reasons why they said a diesel knocked....i guess i should have paid more attention...haha i always say just because they do.....or its all the power about ready to blow out the engine....
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Old 06-24-2009, 09:11 AM
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Explosion of the fuel, right?
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Old 06-24-2009, 09:11 AM
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well technically it doesnt explode....we got yelled at in class for sayin that...but yeah thats pretty much the reason...
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Old 06-24-2009, 09:01 PM
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The impact of the injector, the release of the extreme pressure in the oil lines to the in injector's, the function of the HPP.
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Old 06-24-2009, 09:08 PM
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i thought it was atomization of air and the diesel thats not perfectly delivered by the injectors. great for gas not so for diesel, true or not?
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Old 06-24-2009, 09:16 PM
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whether its true or not, when the Common Rail Diesel (CRD) came out at Dodge (04.5 model year), Daihmler-Chrysler training told us that the fuel was heated in the grid heater and not injected cold into the cylinder which cut back on the "knock" sound and made the engine quite a bit quieter.....
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Old 06-24-2009, 09:54 PM
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Dodges are still not quiet lol
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