what is the fuction of EGR valve
Answers were Sorted based on User's Feedback
Answer / kkumar
EGR means Exhaust Gas Recirculation. The main function of
EGR is to control NOx emission from the engine.
At elevated temperature (during long run & full condition)
if due to some reasons engine gets heated up beyond certain
level... it produces NOx emission. In order to avoid this
pollution , we have to control the temperature rise inside
the cylinder. This can be achieved by mixing some amount of
exhaust gas with intake air. By doing this the temperature
inside the combustion chamber is reduced. And NOx is controlled.
| Is This Answer Correct ? | 10 Yes | 1 No |
Answer / gopal
The function of EGR valve is to allow Few percentage the
exhaust gas to the combustion chamber to Reduce NOx. This
valve is non return valve & is controlled ECU( engine
control unit ).
| Is This Answer Correct ? | 6 Yes | 0 No |
Answer / karthick
exhaust gas recirculation-high temperature inside the
combustion chamber emits NOx which combines with
hydrocarbons to form smog.to reduce this,some part of
exhaust gases is mixed with intake air.as the exhaust gases
have already been burned,so it doesn't burn again.this
reduces the temperature to hundred degree and thereby
reduces NOx emissions
| Is This Answer Correct ? | 1 Yes | 1 No |
A simple problem involing in hoops stress. For sphere: M= [3/2]*p*V*[density of pressure vessel material/Maximum working stress it can tolerate] For Thin walled pressure walls: Hoops stress or stress in the radial direction =p*r/2t ?
0 Answers Bhel, JPMorgan Chase,
What happens when too much oil is injected in the working cylinder
how can you measure wt. of G.I.pipes knowing od,id,length.
How does the steam work in a steam turbine?
0 Answers ABC Inc, RRB, Siemens,
What is the difference between air conditioning and refrigeration?
what is difference between main steam to dearator & pegging steam to dearator?
what is threaded joints ,where present usage ?
how can I masurement the circale weight ? like- 312mm i/d x 392mm o/d x 6mm thick.
What is a torque converter?
i want some quiz question on auto mobile can someone suggest any website for this
what is more dangerous longitudinal stress or Hoop stress and why?
1. What are good characteristics of good combustion in a boiler? 2. What do you analyze from boiler water analysis? 3. What do you treat in high alkalinity of boiler water? 4. What is a feed water pump? Dearator feed heater? 5. What is the purpose of the nozzle of impulse turbine? 6. What are the things needed to have an efficient boiler burning? 7. Name Of Parts And Each Purpose 8. What are the causes of emergency stop in a steam engine? 9. What is the normal vacuum pressure in a steam turbine atmospheric condenser? What would cause the press to falls? 10. Steam turbine (function an parts) 11. What is the boiling point of water? 12. What are the safety devices of boiler? 13. What is the effect of high alkaline water to a boiler? 14. Steps In starting boilers. 15. Small gear found in the steam turbine. 16. What is an Economizer? 17. What are the methods of heat transfer? 18. Types of pressure 19. What are the different parts of impulse reaction turbine? 20. What is the color of the flame of the boiler running in good condition? 21. What type of pump is commonly used is feed water system in auxiliary boiler? 22. What is the specific heat of water? 23. What do you do to prevent flare black? 24. What is a brake horsepower? 25. What is the purpose of a de-superheater? 26. What is the purpose of corrugated furnaces? 27. What are the causes of steam turbine failure? 28. What is the purpose of superheater? 29. Given a cutaway isometric view of the steam turbine. Examinee was asked to identify the following Parts: 30. What is thrust bearing? 31. Give five boiler mounting valves. 32. In steam boiler, what are the various test in water boiler? 33. How much calorific value of heat is needed to heat 00c of 34. What will happen if boiler backfires? 35. What is the color of flame if the boiler is running in good condition? How about when it is not in good condition? 36. How does the steam work in a steam turbine? 37. What are the causes of boiler backfire and steps in how to prevent it from happening? 38. What are the causes of high alkalinity in boiler water? 39. What are sensible heat, latent heat, and specific heat of water? 40. What are the causes of turbine vibration 41. Identify the parts of steam turbine 42. What is the normal Ph value of boiler water 43. Causes of dilution of lubricating oil in a steam turbine? 44. Explain briefly- good combustion of auxiliary boiler? 45. Method of testing or checking boiler water? 46. What is mean carry over of Aux. Boiler? 47. What are steam turbine parts usually come into damage? 48. Why must we pay attention when we drain steam in steam turbine. What factors are observed? 49. What type of pump use in boiler F.O. system? 50. What parameters to be reported when we send lubricating oil for shore analysis? 51. In boiler, what does steam and smoke goes out to the funnel. What reason? 52. Where can you find the feed check valve and feed stop valve and give the purpose of it? 53. What are the causes of troubles in boiler during operations? 54. Give the purpose of nozzle in impulse turbine? 55. What s gland sealing steam? 56. How to prevent back fire of boiler? 57. What is the used of economizer in boiler? 58. What is the seal packing gland for turbine? 59. What is the flow of steam in an impulse turbine? 60. What will happen if you blow the soot in the boiler? 61. State the purpose of air heater? 62. How to operate soot blower boiler and economizer? 63. What do you mean by A.CC.? 64. What is the thermal efficiency of a diesel engine? 65. What is a blow down valves?
Civil Engineering (5086)
Mechanical Engineering (4453)
Electrical Engineering (16638)
Electronics Communications (3918)
Chemical Engineering (1095)
Aeronautical Engineering (239)
Bio Engineering (96)
Metallurgy (361)
Industrial Engineering (259)
Instrumentation (3014)
Automobile Engineering (332)
Mechatronics Engineering (97)
Marine Engineering (124)
Power Plant Engineering (172)
Textile Engineering (575)
Production Engineering (25)
Satellite Systems Engineering (106)
Engineering AllOther (1379)