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Why the diesel engine has more vibration compare to petrol engine?

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Question added by Syed Hussaini , Senior Design engineer , private
Date Posted: 2014/03/12
ibrahim bah
by ibrahim bah , Miantenance Engineer , BCMI

diesel engine compress no compression in petrol engine

NITHISH GEORGE NINAN
by NITHISH GEORGE NINAN , CONTRACT EMPLOYEE , HCL TECHNOLOGIES

SHARP POWER PULSES OCCURING DURING COMBUSTION IN DIESEL ENGINES

Deleted user
by Deleted user

It's because diesel fuel ignites under compression, rather than by a spark, so burns rather than ignites, is less controllable which results in diesel 'knock' which accounts for most of the noise you can hear.

The actual combustion noise itself, is not very dissimilar to that of a petrol, a lot of the vibration from a diesel engine comes from the high pressure fuel pump and injection system.