volvo technology corporation 06520, em, 2005-11-22 /1 fpec, free piston energy converter principal...
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Volvo Technology Corporation06520, EM, 2005-11-22 /1
FPEC, Free Piston Energy Converter
Principal layout of the prototype
(USFD, INNAS)
Volvo Technology Corporation06520, EM, 2005-11-22 /2
FPEC, Free Piston Energy Converter
The electrical machine
(ABB)
Volvo Technology Corporation06520, EM, 2005-11-22 /3
FPEC, Free Piston Energy Converter
The combustion system
(IFP, INNAS, CTH)
HCCI combustion
Two-stroke
Cyl. vol.: 2x1 litre
Diesel fuel
Simulation results:
Poweroptimal: 23 kW
Efficiencyind: ~51%
Efficiencyeff: ~46%
Volvo Technology Corporation06520, EM, 2005-11-22 /4
FPEC, Free Piston Energy Converter
Cylinder
Volvo Technology Corporation06520, EM, 2005-11-22 /5
FPEC, Free Piston Energy Converter
Cylinder head, complete
Volvo Technology Corporation06520, EM, 2005-11-22 /6
FPEC, Free Piston Energy Converter
Photograph of the prototype
(INNAS)
Volvo Technology Corporation06520, EM, 2005-11-22 /7
FPEC, Free Piston Energy Converter
Prototype in the test cell at Chalmers
Volvo Technology Corporation06520, EM, 2005-11-22 /8
FPEC, Free Piston Energy Converter
• Control Inputs
- Electromagnetic force, Fel
- Fuel input, Qcomb
• Controlled Outputs:
- Output power, P- Ignition time, tign
(VTEC, USFD)
Control layout
Volvo Technology Corporation06520, EM, 2005-11-22 /9
FPEC, Free Piston Energy Converter
1005 1010 1015 1020 1025 1030 1035 1040 1045-15
-10
-5
0
5
10
15
Time [ms]
El-force [kN]Piston displacement [cm]Piston velocity [m/s]
x0 x
1 x
2 x
3
(USFD, VTEC)
Control strategy
Volvo Technology Corporation06520, EM, 2005-11-22 /10
FPEC, Free Piston Energy Converter
Balancing of the free piston engine
Volvo Technology Corporation06520, EM, 2005-11-22 /11
FPEC, Free Piston Energy Converter
Main project results
• Integral prototype, rated power 15-50 kW to confirm efficiency, emissions, control procedures, etc.
• Experimental verification of performance.
• Results from modelling the onboard electricity generation system, especially controllability, performance at part load and transients.
• Results from scaling and packaging studies.
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