29-06-2012, 02:02 PM
GASOLINE DIRECT INJECTION
GASOLINE DIRECT INJECTION.pptx (Size: 646.12 KB / Downloads: 113)
OPERATING DIFFICULTIES OF A CARBURATOR
ICE FORMATION
VAPOUR LOCK
BACK FIRING
ADVANTAGES OF FUEL INJECTION OVER CARBURATOR
Lower exhaust emissions.
Increased volumetric efficiency.
Increased output power and torque.
Low SFC.
Rapid engine response.
ELECTRONIC FUEL INJECTION
MULTI POINT FUEL INJECTION (MPFI)
GASOLINE DIRECT INJECTION (GDI)
ENGINE MANAGEMENT SYSTEM
INPUTS (sensors)
engine sensors
mass airflow sensor
oxygen sensor
throatle position sensor
coolant temperature sensors
manifold absolute pressure sensor
engine speed sensor
crank angle sensor
EXHAUST EMISSIONS OF GDI ENGINE
Very low CO emission
Increased hydrocarbon emission
NOx emissions at full load
EMISSION CONTROL
Three way catalytic convertor
(CO,HC,NOx)
Storage type catalytic convertor
CURRENT TRENDS AND FUTURE CHALLENGES
GDI with turbocharger.
Lower emission
Piezo electric injectors
Laser induced ignition
Alternate fuel
Cost
CONCLUSION
Advantages
Reduced CO2 production by nearly 20%
Improves torque as well as power
Fulfills emissions requirements
97% NOx reduction
Reduced fuel consumption
Spontanious response behaviour
GASOLINE DIRECT INJECTION.pptx (Size: 646.12 KB / Downloads: 113)
OPERATING DIFFICULTIES OF A CARBURATOR
ICE FORMATION
VAPOUR LOCK
BACK FIRING
ADVANTAGES OF FUEL INJECTION OVER CARBURATOR
Lower exhaust emissions.
Increased volumetric efficiency.
Increased output power and torque.
Low SFC.
Rapid engine response.
ELECTRONIC FUEL INJECTION
MULTI POINT FUEL INJECTION (MPFI)
GASOLINE DIRECT INJECTION (GDI)
ENGINE MANAGEMENT SYSTEM
INPUTS (sensors)
engine sensors
mass airflow sensor
oxygen sensor
throatle position sensor
coolant temperature sensors
manifold absolute pressure sensor
engine speed sensor
crank angle sensor
EXHAUST EMISSIONS OF GDI ENGINE
Very low CO emission
Increased hydrocarbon emission
NOx emissions at full load
EMISSION CONTROL
Three way catalytic convertor
(CO,HC,NOx)
Storage type catalytic convertor
CURRENT TRENDS AND FUTURE CHALLENGES
GDI with turbocharger.
Lower emission
Piezo electric injectors
Laser induced ignition
Alternate fuel
Cost
CONCLUSION
Advantages
Reduced CO2 production by nearly 20%
Improves torque as well as power
Fulfills emissions requirements
97% NOx reduction
Reduced fuel consumption
Spontanious response behaviour