1. INTERNAL COMBUSTION ENGINES
LECTURER
PROF.Dr. DEMIR BAYKA

2. ENGINE OPERATING CHARACTERISTICS

4. Ni Pi Pb Nb
SI ENGINE

5. CI ENGINE
CI ENGINE

7. OPERATING POINT

8. IMPORTANT OPERATING VARIABLES
1. SPARK TIMING

9. IMPORTANT OPERATING VARIABLES
1. SPARK TIMING
2. MIXTURE COMPOSITION
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

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)

25. TOYOTA AG4 CHAMBER

28. TOYOTA
20 VALVE
4AGE
ENGINE

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

51. SUPERHEATED FUEL VAPORIZATION

52. Plasma reformer

54. DISPLACEMENT
ON DEMAND
5.3 LITER ENGINE
ON SAAB SUV

56. HONDA VARIABLE CYLINDER MANAGEMENT (VCM)

57. HONDA HCCI
TEST ENGINE
HOMOGENEOUS
CHARGE
COMPRESSION
IGNITION

58. CI ENGINES

60. AIR-SWIRL
AND
BOWL IN PISTON DESIGN

61. Isuzu
Bowl and squish chamber
Perkins
M-system

62. M-system

63. CHEVROLET DIESEL COMBUSTION CHAMBER

64. SUPERCHARGING AND TURBOCHARGING

65. HYDROGEN FUEL CELL HYBRID BUS