Engine control

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Engine control KCFP reference group
meeting January 2007
Carl Wilhelmsson, PhD student Per Tunestål, Dr.
Dr. Ass. Prof. Bengt Johansson, Dr. Prof.
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Outline

• Current control path results 2006
• Undergoing work, not yet published
• Outlook
• Questions, comments and suggestions

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Publications 2006

• SAE 2006-01-0205, The Effect of Displacement on
  Air-Diluted Multi-Cylinder HCCI Engine
  Performance
• IFP E-COSM, Model based engine control using
  ASICs A Virtual heat release sensor
• FISITA F2006P039, FPGA Based Engine Feedback
  Control Algorithms

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FPGA Based Engine Control algorithms

• Throughput 50MHz
• Delay 120ns
• Asynchrounous operation
• In cycle HR analysis!

Simulated engine
Oscilloscope
Signal conditioning
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Planned Papers 2007

• JSAE, SAE, Operation strategy of a Dual Fuel HCCI
  Engine with VGT
• IFAC, An Ultra High Bandwidth Automotive Rapid
  Prototype System
• SAE?, FPGAs in Automotive Control Applications, a
  Survey

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Operation strategy of a Dual Fuel HCCI Engine
with VGT
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Conclusions

• Natural gas seems to be a badly suited fuel for
  pure HCCI operation
• A operational strategy for the described engine
  was developed and analyzed
• It was possible to increase the maximum
  achievable load with 2 bar using the described
  strategy and turbocharger
• The limiting factor among the ones regulated by
  the operational strategy are the emissions of
  NOx
• The increased load range comes to an cost in net
  indicated efficiency compared to a not
  supercharged engine

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Rapid prototype system
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Rapid prototype goals

• Simulink provides flexibility for control of
  peripheral equipment (turbo, fuel rail pressure
  etc)
• Simulink provides flexibility for between cycle
  combustion control
• Standard COTS components and open communication
  protocols provides flexibility
• FPGA provides less flexible ultra bandwidth
  control possibilities

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FPGAs in Automotive Control

• Application examples
• Automotive
• Feedback control
• Modelling
• Design methodologies
• Design layouts
• Mixed systems
• Possibilities/drawbacks
• Cost
• Performance
• Design
• Performance outlook

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Technical development plan

• Obtained direct injected Diesel engine with state
  of the art common rail system
• Setup Matlab/simulink rapid prototype environment
  with FPGA as described in IFAC paper

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Goals

• En deepen FPGA knowledge and design skill
• Setup test equipment enabling ultra high
  bandwidth control research
• Increase combustion related, control oriented
  modelling activity
• Increase the work with hardware driven ultra
  bandwidth control oriented models

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Suggestions?

• Timescale
• Technical
• Investigational