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INTERNAL COMBUSTION ENGINES
LECTURER
PROF.Dr. DEMIR BAYKA
ENGINE OPERATING CHARACTERISTICS
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SI ENGINE
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CI ENGINE
CI ENGINE
OPERATING POINT
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IMPORTANT OPERATING VARIABLES
1. SPARK TIMING
IMPORTANT OPERATING VARIABLES
2. MIXTURE COMPOSITION
1. SPARK TIMING
IN SI ENGINES THE HIGHESTCOMBUSTION EFFICIENCY ISACHIEVED WITH VAPORIZED FUEL
HOWEVER THE FUEL IS NEVER FULLYVAPORIZED
THEREFORE LEAN MIXTURES ARE DIFFICULT TO BURN
IDLE OPERATION : REQUIRES RİCH MIXTURE
PART LOAD OPERATION : REQUIRES LEAN MIXTURE
FULL LOAD OPERATION : REQUIRES RICH MIXTURE
LOAD AND SPEED
IMPORTANT DESIGN VARIABLES
1. COMPRESSION RATIO
SURFACE TO VOLUME RATIOINCREASES AS COMP. RATIO INCREASES
MORE HEAT TRANSFER :SLOWER COMBUSTION
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)
TOYOTA AG4 CHAMBER
TOYOTA20 VALVE4AGE ENGINE
TOFAŞ motorun İki Döngülü Yanma Odası olan silindirler kapağının fotoğrafı
İki Döngülü Yanma Odasında yanma prosesinin anlık fotoğrafları
Homojen yanma
İki aşamada yanma
SUPERHEATED FUEL VAPORIZATION
Plasma reformer
DISPLACEMENTON DEMAND
5.3 LITER ENGINEON SAAB SUV
HONDA VARIABLE CYLINDER MANAGEMENT (VCM)
HONDA HCCITEST ENGINE
HOMOGENEOUSCHARGECOMPRESSIONIGNITION
CI ENGINES
AIR-SWIRLAND
BOWL IN PISTON DESIGN
Bowl and squish chamber Isuzu
Perkins M-system
M-system
CHEVROLET DIESEL COMBUSTION CHAMBER
SUPERCHARGING AND TURBOCHARGING
HYDROGEN FUEL CELL HYBRID BUS