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D E E P A K S H A R M A
M E 0 8 0 1 8
LASER INDUCED IGNITION OF
GASOLINE
DIRECT INJECTIOIN ENGINES
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WHAT IS LASER?
NAMELASER IS AN ACRONYM FORLIGHT AMPLIFICATION BY THE STIMULATED EMISSION OF
RADIATION
INTENSE AND UNIDIRECTIONAL BEAM OF LIGHT .
MONOCHROMATIC , COHERENT .
MAIN THREE PARTS
POWER SUPPLY LASING MEDIUM PAIR OF PRECISELY ALIGNED MIRRORS
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TYPES OF LASERS
SOLID STATE LASERS . * Distributed solid matrix* Non-toxic & Long life* Ex. Ruby, YAG
GAS LASERS . * O/p of visible Red light
* Corrosive & toxic* Ex. He, HeNe, CO2
DYE LASERS * Complex Organic dyes* Tunable Over Broad
range of wavelength
SEMICONDUCTOR LASERS * Called diode laser* Ex. HPDD laser
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Potential Future IgnitionSystem
Homogeneous Charge Compression Ignition(HCCI)
Diesel pilot ignition
Laser ignition
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Laser Ignition
An alternative solution to standard spark plug is the use of
pulsed laser, focused to create plasma, representing the laser
ignition.
Laser ignition, or laser-induced ignition, is the process ofstarting combustion by the stimulus of a laser light source.
Spark creation due to the local deposition of energy
Ignition itself based on a positive balance between the
deposited energy and the losses
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mixture burning
focused laser beam
plasma
I>Ithreshold
flame kernelE>Eignition
laser beam
convex lens
Principle of Laser Ignition
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Advantages of Laser Ignition
Arbitrary positioning of the ignition plasma
Absence of quenching effects
Absence of erosion effects
Precise ignition timing
Simpler regulation of the ignition energy
Easy possibility of multipoint ignition
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NOx Emission Potentials
330
240
70
250
190
0
50
100
150
200
250
300
350
spark ignition
laser ignition
NOX [mg/Nm]
diesel pilot ignition
direct pre chamber direct pre chamber
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Laser Arrangement
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Challenges
Propagation of laser pulse through fiber optics
Develope of a compact, robust and economic lasersource
Durability of windows
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Laser Vs. Primer
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Laser Vs. Primer
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DRAW BACKS OF CONVENTIONAL SPARK
PLUG
LOCATION OF SPARK PLUG IS NOT FLEXIBLE
NOT POSSIBLE TO IGNITE INSIDE FUEL SPRAY
FREQUENT MAINTENANCE REQUIREMENT
LEANER MIXTURES CANNOT BE BURNED
FLAME PROPAGATION IS SLOW
EMISSIONS ARE MORE( DUE TO IMPROPER COMBUSTION)
HENCE A NEW BETTER SYSTEM IS REQUIRED
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Upcoming Project
Mazda RX-9 16X
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CONCLUSION
THE APPLICABILITY OF A LASER-INDUCED IGNITION SYSTEM ONDIRECT INJECTED GASOLINE ENGINE HAS BEEN PROVEN.
AT PRESENT, A LASER IGNITION PLUG IS VERY EXPENSIVE
COMPARATIVELY
BUT POTENTIAL ADVANTAGES WILL SURELY BRING IT INTO MARKET
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Thanks for Your
Attention
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