SILENCER FOR AUTO VEHICLES

Automobile   silencer   is   an  essential   part   of   any automobile.The  main function of silencer is to reduce  noise  of the vehicle.

An automobile vehicle, while running on a road, produces  an intolerable  noise,  which, is otherwise controlled by  a  proper noise reducing device, will create a hugenoise. The device,  used to minimise this noise is called ‘Silencer’ this device bring the noise  of  an auto engine to much  extract.  Until  comparatively recently,  the  design of silencers for automobiles  &  transport vehicle  engines  has  been largely  empirical  based  unreactive and/or  dissipative  principles. Reactive silencers work  on  the principle  of  reflecting sound energy back towards  the  source. (But  may  also  provide some  energy  dissipation  by  crossflow depending  on  the  design).  Dissipative  Silencers  incorporate chambers  or  sections lined with sound  absorbent  materials  in which sould energy is absorbed. (and turned into heat).

Four  basic type of auto engine silences in  simplified diagrams  are sketched.Each have numbers variants.  The  simplest ones-the  expansion  chamber  &  resonator  are  basically  tuned filters  with  narrow band, attenuation wiliest  still  retaining straight  through geometry (and thus minimum  back  pressurlers). The  reversed  flow (or multipan) is capable of  even  wider  and attenuation (particularly) at law – frequencies), but usually  at the expense of higher back pressure because of the torthnous  gas flowpath  con  which  ,  the  per  furnace  of  silencer  largely depends).

1.   INTRODUCTION
2.   USES & APPLICATIONS
3.   PURPOSE
4.   RAW MATERIAL REQUIREMENTS
5.   PERFORMANCE OF SILENCER
6.   INSPECTION AND QUALITY CONTROL
7.   MARKET SURVEY
8.   PRESENT MANUFACTURERS
9.   MANUFACTURING PROCESS
10.  THE EXHAUST CUT-OUT
11.  DETAILS OF MANUFACTURING PROCEDURES
12.  SIZES SELECTION SHEETS TO BE PURCHASED
13.  PROCESS FLOW SHEET DIAGRAM
14.  NAME AND ADDRESS OF MACHINERY SUPPLIERS
15.  SUPPLIERS OF PLANT MACHINERIES
16.  RAW MATERIALS

APPENDIX – A :

1.      COST OF PLANT ECONOMICS
2.      LAND & BUILDING
3.      PLANT AND MACHINERY
4.      FIXED CAPITAL INVESTMENT
5.      RAW MATERIAL
6.      SALARY AND WAGES
7.      UTILITIES AND OVERHEADS
8.      TOTAL WORKING CAPITAL
9.      COST OF PRODUCTION
10.      PROFITABILITY ANALYSIS
11.      BREAK EVEN POINT
12.      RESOURCES OF FINANCE
13.      INTEREST CHART
14.      DEPRECIATION CHART
15.      CASH FLOW STATEMENT
16.      PROJECTED BALANCE SHEET