Agricultural tractor engine noise prediction and optimization through test and simulation techniques Mahindra and Mahindra Limited

Format:

Book

Conference/Event

Author/Creator:

Hipparge, Vinod, author.

Contributor:

Bhalerao, Sumedh

Chaudhari, Vishal V.

Chavan, Amit

Suresh, Rajendiran

Conference Name:

Symposium on International Automotive Technology (2021-09-29 : Pune, India)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2021

Summary:

Engine radiated noise has complex behavior as engine assemblyconsist different components, varying dynamic forces with widerange of speed. For open station tractor, engine noise is majorcontributor and hence needs to be optimized for regulatory norms aswell customer comfort. The awareness about NVH comfort in domesticmarket and export market is increasing as customer have become moredemanding. This forces OEMS to put serious efforts to ensure theOEL noise / Engine noise is at acceptable levels. Identifying theoptimized countermeasures to reduce the engine noise during theearly design phase has a greater impact in reducing productdevelopment time and cost. This paper describes about a processthat has been established for evaluating engine radiated noise andto improve overall NVH performance. This virtual engine analysishas been carried out with commercially available FE Software andidentified dominant noise contributing components to target noisereduction at engine level. The engine forces are predicted withengine input data in commercially available software. These forcesare applied to the Engine assembly FE model at the strategiclocations to predict the surface vibrations at the component facesand engine 1-m noise. The surface vibration and 1-m noise plots areanalyzed and correlated with test data and modal analysisresults. Top 5 engine components like front cover, crank-pulley,oil-sump et al, were identified towards potential contributors ofengine noise. The modifications are suggested for engine componentsto reduce noise radiated and meet specified noise targets. Theengine development project requirement focused heavily on weightreduction and hence optimization was carried out to improve surfacevibrations and noise. The suggested countermeasures were analyzedand validated to reduce engine noise. It has been observed thatcountermeasures developed with the process described above helpedin improving the noise levels of 3dB(A)

Notes:

Vendor supplied data

Publisher Number:

2021-26-0277

Access Restriction:

Restricted for use by site license