Download - ICE Presentation
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Internal Combustion Engines
By: Christopher Bader, Shadae Boakye-Yiadom, Jane Modes, Spenser Pawlik, Anna Starodubtseva
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Agenda
ICE Basics
Experimental Setup
Data Analysis
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ICE Basics
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Internal Combustion Engines4-Stroke Operating Cycle
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Gasoline vs. Diesel
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Diesel Gasoline
Ideal Thermodynamic Process Isobaric heat addition Isochoric heat addition
Maximum Cylinder Pressure 200 bar 130 bar
Thermal Efficiency 40 - 45% 35 - 40% [1]
Method of Ignition Compression (self-ignition) Spark (electric)
Load Control Fuel guided Throttle
Fuel Injection Pressure 2000 - 2500 bar 100 - 150 bar
Piston Head
[1] http://large.stanford.edu/courses/2011/ph240/goldenstein2/
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Experimental Setup
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Measurement Devices
● Thermocouples● Pt-100
● Dynamic Fuel Measurement
● Piezo-resistive● Piezo-electric
Air Mass Flow
Hot wire anemometer Flow Meter
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Temperature Fuel Mass Flow Pressure
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Real Engine Test Bed Scheme
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Data Analysis
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Cylinder Pressure
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P-V Diagram for Ideal and Calculated 4-Stroke Diesel Engine
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Ideal Calculated
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P-V Diagram for Ideal and Calculated 4-Stroke Diesel Engine
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Calculated
Mean Effective Pressure
2 bar 10 bar Maximum Load
Indicated Work 175.9 J 568.6 J 1083.4 J
Indicated Efficiency 50.9% 45.4% 44.4%
Effective Efficiency 28.4% 39% 39.7%
Calculated Indicated Work and Engine Efficiency
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P-V Diagram for Ideal and Calculated 4-Stroke Diesel Engine
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Mean Effective Pressure
2 bar 10 bar Maximum Load
Indicated Work 175.9 J 568.6 J 1083.4 J
Indicated Efficiency 50.9% 45.4% 44.4%
Effective Efficiency 28.4% 39% 39.7%
Calculated Indicated Work and Engine Efficiency
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Engine Maps
The limits of the engine map are:
● Surge Line: highest pressure turbocharger can produce before the air begins to flow back
● Max Load: maximum power the engine can produce
● Max Temperature: highest exhaust temperature turbocharger can handle
● Min Speed: lowest RPM engine can operate at
● Max Speed: highest RPM engine can operate at
The contour lines show specific fuel consumption (Kg/KW*h). The lower the number, the more efficient the engine is running.
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Danke schӧn! (Thank you)
Questions?
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