1 / 45

M-COMBUSTION CHAMBER AND COLD STARTING OF C.I ENGIINES

M-COMBUSTION CHAMBER AND COLD STARTING OF C.I ENGIINES. M- COMBUSTION CHAMBER. ABSTRACT:-. In this paper, a combustion simulation model for a 4-stroke, direct injection diesel engine is described.

Download Presentation

M-COMBUSTION CHAMBER AND COLD STARTING OF C.I ENGIINES

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. M-COMBUSTION CHAMBER AND COLD STARTING OF C.I ENGIINES

  2. M- COMBUSTION CHAMBER

  3. ABSTRACT:- • In this paper, a combustion simulation model for a 4-stroke, direct injection diesel engine is described. • The combustion modeling was based on the assumption that the combustion process was taken to be only a heat addition process and the in-cylinder conditions are spatially uniform. as the heat release model, the well known wiebe’s combustion function and the white house-way’s heat release model were studied and successfully employed to the combustion simulation • A comparison has been made between the predicted results of the cylinder pressure and rate of heat release and the measured data , and showed that the predictions agreed well with the measured data.

  4. INTRODUCTION:- • The thermodynamic cycle analysis and the performance prediction of diesel engines using the engine cycle simulation programs has become an established part of the diesel engine research and development. • Particularly ,the engine simulation programs based on the single-zone combustion model are widely used by most engine manufacturers because of simplicity and low operating cost in spite of their short comings in accuracy. • These programs can readily utilized for the prediction of cylinder firing pressure for the stress analysis of main engine parts, investigation of engine design via parameter studies

  5. EXPERIMENTATIONS:- • This was a 4-stroke ,water-cooled , in-line 6-cylinder , direct injection and turbocharged diesel engine having ‘M’ type combustion chamber.

  6. The cylinder pressure was measured by a piezo-quartz pressure transducer (AVL-8QP3000) and AVL indicating system equipped with amplifier (AVL type 3059),control unit(AVL type 3059), control unit (AVL type 4004)and 4-channel oscilloscope (Tektronix type 5103N).

  7. ‘M’ COMBUSTION SYSTEM • The ‘M’ system is a kind of direct injection combustion system . However , the ‘M’ system does not distribute the fuel in the air initially, but sprays it with a single-hole nozzle onto the oil cooled wall of the spherical combustion chamber, where it spreads to form a thin film. • The fuel is injected in the direction of a high speed air swirl which is produced during the suction stroke of the engine by the helical inlet ports. • The orientation of the fuel jet parallel with the air swirl reduces the relative velocity between the air and fuel jet which, coupled to a short distance between nozzle combustion chamber wall, helps to prevent the fuel jet being broken up to any great extent.

  8. This means that during injection only a relatively small portion of the fuel is mixed with the air and prepared for ignition. • Therefore, independent of the temperature and stress level of the engine, there is only a very small amount of air/fuel mixtures ready for the reactions that precede combustion. • As a result, the initial rate of heat released is slowed down considerably and quiet, controlled combustion cycle achieved.

  9. THERMODYNAMICS OF COMBUSTION PROCESSES

  10. COMBUSTION MODEL

  11. CALCULATION RESULTS

  12. EFFECT OF PARAMETERS ON THE CYLINDER PRESSURE AND THE RATE OF HEAT RELEASE IN THE TWO WIBE FUNCTIONAL MODEL

  13. EFFECT OF PARAMETERS ON THE CYLINDER PRSSURE AND THE RATE OF HEAT RELEASE IN THE WHITE HOUSE WAY’S MODEL

  14. COMPARISION OF EXPERIMENTAL AND PREDICTED RESULTS FOR TEST ENGINE AT RATED SPEED AND PEAK TORQUE SPEED

  15. COLD STARTING OF I.C ENGINES

  16. ASTRACT:-

  17. INTRODUCTION:-

  18. S.I ENGINES:-

  19. C.I ENGINES:-

  20. ENGINE DESIGN:-

  21. LUBRICATING OIL:-

  22. EFFECT OF OIL VISCOSITY ON CRANKING SPEED

  23. FUELS:-

  24. COOLANT AND BATTERY CONDITION:-

  25. FREEZING POINT OF THE MIXTURE OF WATER AND GLYCOL

  26. STARTING MOTORS:-

  27. HEATERS:-

  28. TYPES OF FLUID STARTER USED IN IIP

  29. CONCLUSION:-

More Related