Engine control system using a cylinder pressure sensor

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Engine control system using a cylinder pressure sensor

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IEE Proceedings D (Control Theory and Applications) — Recommend this title to your library

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© The Institution of Electrical Engineers
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Individual cylinder combustion control systems using a cylinder pressure sensor have already been introduced to realise highly tolerant system to the variability of engine components, fuel quality and environmental conditions. The paper deals with such an application of a cylinder pressure sensor to air/fuel ratio control, which is to control air/fuel ratio to the lean limit of engine stability. To detect the engine stability limit, some statistical signal processing method was applied to the detected peak pressure crank angle position Θpmax. By using this method, this system needs only relative cylinder pressure value to detect Θpmax, hence a practical piezoelectric type washer transducer was good enough for this application.

Inspec keywords: electric sensing devices; piezoelectric transducers; pressure measurement; pressure transducers; internal combustion engines

Other keywords: piezoelectric type washer transducer; component variability tolerance; cylinder pressure sensor; peak pressure crank angle position; engine stability; internal combustion engine control; lean limit; statistical signal processing method; environmental conditions tolerance; air/fuel ratio control; individual cylinder combustion control systems; fuel quality tolerance

Subjects: Control of heat systems; Pressure and vacuum measurement; Sensing devices and transducers; Piezoelectric and ferroelectric devices; Pressure and vacuum control

References

    1. 1)
      • J.D. Powell . (1983) Close loop control of spark advance using cylinder pressure, Application of control theory in the automotive industry.
    2. 2)
      • Hamai, K., Nakagawa, Y., Nakai, M.: `Analysis of the causes of unstable combustion in a spark ignited engine', 1982 Fall Meeting, October 1982, Western States Section/The Combustion Institute, 82–73.
    3. 3)
      • Ina, T., Obayashi, H., Shigematsu, T.: SAE Paper 860413, Lean limit A/F control system by using engine speed variation.
    4. 4)
      • Hata, Y., Asano, M.: SAE Paper 860592, New trends in electronic engine control.
    5. 5)
      • Sawamoto, K., Nakajima, Y., Hidaka, T., Nemoto, T.: `A newly-developed cylinder pressure sensor as part of an individual cylinder knocking control system', Proceedings of IECON '86, 1986, p. 873–876.
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