Optical engine research - Teknologiateollisuus · 2019-06-18 · Optical engine research ... •...
Transcript of Optical engine research - Teknologiateollisuus · 2019-06-18 · Optical engine research ... •...
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Optical engine research –
Tuomo Hulkkonen (M.Sc.), Doctoral student.
Department of Energy Technology, Aalto University
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Internal Combustion
Engine Research Group
The Optical Engine at Aalto University
• Based on domestic Agco Sisu Power 84
diesel engine
• Single cylinder
• Max speed: 1500 RPM
• Electro-hydraulic valve actuators (EHVA)
• Fully adjustable valve timings and lifts
• External charge air compressor and heater
• Common rail injection
• Optical access through piston top and
cylinder liner Parameter Value Unit
Number of cylinders 1 (6)
Cylinder diameter 111 mm
Stroke 145 mm
Compression ratio 17:1
No. of valves 4
Maximum speed 1500 RPM
Maximum injection pressure 1600 bar
Motored peak pressure 85 bar
Injector holes 8
Nozzle hole diameter 133 µm
Spray cone angle 152°
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Internal Combustion
Engine Research Group
Key components: Piston
Piston top (quartz)
Original piston
Piston extension
(titanium)
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Internal Combustion
Engine Research Group
The Optical Access
Mirror
Piston
Piston
window
Cylinder
windows
Window ring
Camera
Fuel injector
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Combustion diagnostics
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Spray visualization
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Post processing.
2.5 CA° ASOI 3.0 CA° ASOI 3.5 CA° ASOI
4.5 CA° ASOI 5.0 CA° ASOI 5.5 CA° ASOI
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Internal Combustion
Engine Research Group
Liquid spray diagnostics
The area of spray
The spray angle The spray width
The spray tip
penetration A
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OH chemiluminescence
• Chemiluminescence is natural emission of photons
during chemical reactions.
• OH molecule is important intermediate species in
combustion, present in high temperature zones.
• OH radicals are formed during oxidation
(combustion).
• OH radicals emit ultraviolet light around 310 nm and
it is detected with measurement devices.
• OH chemiluminescence is used to determine spatial
and temporal ignition.
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6.2 CA° ASOI 6.4 CA° ASOI 6.6 CA° ASOI
6.8 CA° ASOI 7.0 CA° ASOI 7.2 CA° ASOI
7.4 CA° ASOI 7.6 CA° ASOI 7.8 CA° ASOI
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8.1 CA° ASOI
OH Chemiluminescence diagnostics
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8.1 CA° ASOI
OH Chemiluminescence diagnostics
ll
Lift-off lenght Area
A
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Liquid spray, diffusion flame and
chemical OH-reactions at the same
crank angle 7,0 CAD ASOI
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Internal Combustion
Engine Research Group
Conclusions
• Liquid spray diagnostics and combustion diagnostics
with OH chemiluminescence method are effective
tools to analyze and develop internal engine
combustion processes.
• All important engine parameters are variable with
optical engine of Aalto university.
• The engine will have crucial role while developing
new cleaner combustion processes for future
demands.
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Internal Combustion
Engine Research Group
Thank you!
Questions? Comments?
Tuomo Hulkkonen, DI
Puhelin: +358 50 4085530
Aalto-yliopiston Insinööritieteiden korkeakoulu
Energiatekniikan laitos
PL 14300, 00076 AALTO
Puumiehenkuja 5 A, 02150 Espoo
http://ene.aalto.fi/
Tuomo Hulkkonen, M.Sc.(Tech)
Phone: +358 50 4085530
Aalto University School of Engineering
Department of Energy Technology
P.O.BOX 14300, FI-00076 Aalto, Finland
Puumiehenkuja 5 A, 02150 Espoo
http://ene.aalto.fi/en