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INTERNAL COMBUSTION ENGINES LECTURER PROF.Dr. DEMIR BAYKA.

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Presentation on theme: "INTERNAL COMBUSTION ENGINES LECTURER PROF.Dr. DEMIR BAYKA."— Presentation transcript:

1 INTERNAL COMBUSTION ENGINES LECTURER PROF.Dr. DEMIR BAYKA

2 ENGINE OPERATING CHARACTERISTICS

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4 NbNb NiNi PiPi PbPb SI ENGINE

5 CI ENGINE

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7 OPERATING POINT

8 IMPORTANT OPERATING VARIABLES 1. SPARK TIMING

9 IMPORTANT OPERATING VARIABLES 2. MIXTURE COMPOSITION 1. SPARK TIMING IN SI ENGINES THE HIGHEST COMBUSTION EFFICIENCY IS ACHIEVED WITH VAPORIZED FUEL HOWEVER THE FUEL IS NEVER FULLY VAPORIZED THEREFORE LEAN MIXTURES ARE DIFFICULT TO BURN

10 IDLE OPERATION : REQUIRES RİCH MIXTURE PART LOAD OPERATION : REQUIRES LEAN MIXTURE FULL LOAD OPERATION : REQUIRES RICH MIXTURE

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12 LOAD AND SPEED

13 IMPORTANT DESIGN VARIABLES 1. COMPRESSION RATIO SURFACE TO VOLUME RATIO INCREASES AS COMP. RATIO INCREASES MORE HEAT TRANSFER : SLOWER COMBUSTION

14 2. COMBUSTION CHAMBER DESIGN MAXIMUM FLAME SPEED IS DESIRED FASTER BURNING CHAMBER IS THE BEST DESIGN 1) HIGHER FLAME FRONT AREA (GEOMETRY) 2) SHORTER FLAME TRAVEL (SPARK PLUG LOCATION) 3) MINIMUM MALDISTRIBUTION (FUEL INJECTION TO THE INLET PORT OR INTO THE COMBUSTION CHAMBER) 4 ) HIGHER TURBULENCE (SWIRL DURING INDUCTION)

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25 TOYOTA AG4 CHAMBER

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28 TOYOTA 20 VALVE 4AGE ENGINE

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40 TOFAŞ motorun İki Döngülü Yanma Odası olan silindirler kapağının fotoğrafı

41 İki Döngülü Yanma Odasında yanma prosesinin anlık fotoğrafları

42 Homojen yanma

43 İki aşamada yanma

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51 SUPERHEATED FUEL VAPORIZATION

52 Plasma reformer

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54 DISPLACEMENT ON DEMAND 5.3 LITER ENGINE ON SAAB SUV

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56 HONDA VARIABLE CYLINDER MANAGEMENT (VCM)

57 HONDA HCCI TEST ENGINE HOMOGENEOUS CHARGE COMPRESSION IGNITION

58 CI ENGINES

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60 AIR- SWIRL AND BOWL IN PISTON DESIGN

61 Bowl and squish chamber Isuzu Perkins M-system

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63 CHEVROLET DIESEL COMBUSTION CHAMBER

64 SUPERCHARGING AND TURBOCHARGING

65 HYDROGEN FUEL CELL HYBRID BUS


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