MAK493E-09 Mixture preperation in SI engines
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1 Internal Combustion Engines – MAK 493E MIXTURE PREPERATION in SI ENGINES Prof.Dr. Cem Soruşbay Istanbul Technical University Internal Combustion Engines – MAK 493E Mixture Preperation Introduction – engine performance and emissions Carburettors Fuel injection systems for gasoline engines
Transcript of MAK493E-09 Mixture preperation in SI engines
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Internal Combustion Engines – MAK 493E
MIXTURE PREPERATION in SI ENGINES
Prof.Dr. Cem SoruşbayIstanbul Technical University
Internal Combustion Engines – MAK 493E
Mixture PreperationIntroduction – engine performance and emissionsCarburettors Fuel injection systems for gasoline engines
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Spark Ignition Engines
Simple Carburettor
FLOAT CHAMBER
FUEL IN
FLOAT
FLOAT VALVE
THROTTLE VALVE
AIR IN
VENTURITHROAT
VENTURI
MAIN JET ORIFICE
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Simple Carburettor
p
pa
ba m
X
pb
∆pk
Venturi
Bas›nçpressure
venturi throat
Idle Arrangement in a Carburettor
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Zenith System – for fuel economy
Solex System – for fule economy
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Mixture Enrichment – for high power operation
Mixture enrichment with intake manifold pressure control
Mixture Enrichment – for high power operation
Mechanical system Float chamber pressure control
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Start-up Mechanism
Enrichment by increase in fuel flow rate
Acceleration Mechanism
Mixture enrichment mechanisms
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Fuel Injection
Classification of Gasoline Injection Systems
Location of injection :intake manifold – single point injection, multi point injectioninto the cylinder directly (GDI)
Timing of injection :continuous injectiontimed injection
Fuel Injection Systems
Fuel injection into the intake manifold
INTAKE MANIFOLD
INJECTOR
COMBUSTION CHAMBER
INTAKE VALVE
.
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Fuel Injection Systems
Fuel Injection Systems
Cylinder head configuration for spray-guided concept
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Fuel Injection Systems
Fuel Injection Systems
Gasoline Direct Injection
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Gasoline Injection
Bosch D-jetronic system
Gasoline Injection
Bosch KE-jetronic system
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Gasoline Injection
Bosch L-jetronic system
Control Mechanism – ignition, enrichment, EGR
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Control Mechanism – engine r.p.m.
