fcep wp1 – all the rest… teemu sarjovaara jingzhou yu matteo imperato zaira künsch antti...
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FCEP WP1 – All the rest…
Teemu SarjovaaraJingzhou YuMatteo ImperatoZaira KünschAntti Elonheimo
ÅA 11.12.2012
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WP 1.2 Optical Measurements• Optical engine measurements by Elonheimo and
Hulkkonen• Gas jets with single hole nozzle by Jingzhou Yu
(Currently at Wärtsilä) • Gas jets with pintle nozzle by Zaira Künsch (ETH), on
going.
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Internal Combustion
Engine Research Group
The New Optical Engine at Aalto University
• Based on domestic Agco Sisu Power 84 diesel engine
• Single cylinder• Max speed: 1500 RPM• Electro-hydraulic valve actuators
• Fully adjustable valve timings and lifts• External charge air compressor• Common rail injection• Optical access through piston top and cylinder
liner
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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 (quartz)
Window ring
Camera
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Internal Combustion
Engine Research Group
Experimental set-up at Aalto University
Liner
Piston Extension
45° Mirror
Protection Glass
Cylinder Head
Electro-Hydraulic
ValveActuator
CCD Camera
Mechanical Shutter
Common Rail
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Internal Combustion
Engine Research Group
Miller tests
• Load: 50% (boundary conditions)• Speed: 800 rpm• Injection Timing: 1,2 bTDC• Injection Duration: 1 ms (~5 CAD)• Injection Pressure: 464 bar• Fuel: HVO (NExBTL)• Three intake valve timings: Normal, Miller
50, and Miller 80• CCD Camera: 1376×1040 Pixels• Imaging through glass piston top• Lighting with LEDs• Measurements: Spray penetration and
cone angle, and visible ignition
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Internal Combustion
Engine Research Group
Pictures from the Miller tests (Normal timing)
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Measurements by Yu
• PLIF method• Hoerbiger gas injector
– Single hole (0,5mm)
• Nitrogen acetone mixture
• Result will be presented in SAE WC 2013
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Measurements by Künsch
• PLIF method• Pinttle nozzle
– Siemens pietzo injector for DI gasoline engines
• Nitrogen acetone mixture• Diploma Thesis • Will be finished early
2013
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p_inj = 10 bar
p_inj = 20 bar
p_inj = 30 bar
2.0 ms 2.5 ms 3.5 ms
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WP 1.3Extreme Value Research• Single cylinder turbo charging model development by
Jussi Nurmiranta (Currently at Wärtsilä)• Seizure with EVE engine in January 2012 (not FCEP
tests) suspended the engine running for whole spring 2012
• Engine was back in running condition in July 2012• FCEP test runs continued in November
– 300 bar injection parameter study (finished)– Pilot injection study (on-going)
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Figure 6. The correlation between pulse factor (β) and pulse ratio (PR) with valve timing A
Figure 7. The correlation between pulse factor (β) and pulse ratio (PR) with valve timing B
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Figure 1. Left: Measured exhaust gas pressure pulsation in the exhaust runners of SCE and MCE. Right: Simulated exhaust gas mass flows at the turbine entry position from SCE and MCE.