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IEEE Control Systems

Issue 5 • Oct 1998

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Displaying Results 1 - 7 of 7
  • Observer-based air fuel ratio control

    Publication Year: 1998, Page(s):72 - 83
    Cited by:  Papers (73)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1032 KB)

    This paper discusses the application of linear observer theory to engine control with a specific focus on observers based on exhaust measurements. The motivation for this architecture is that a direct measurement of the relevant quantity (the exhaust chemistry entering the catalyst) will typically lead to the most accurate control. A secondary motivation is the need to reduce costs. If sufficient ... View full abstract»

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  • Using fuzzy logic in control applications: beyond fuzzy PID control

    Publication Year: 1998, Page(s):100 - 104
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1328 KB)

    Fuzzy logic is used mostly to handle high-level control functions that traditional control methods do not address. This article discusses different ways that fuzzy logic can be used in high-level control functions. Specifically, we examine the use of fuzzy logic for supervisory control, for selecting discrete control actions, for identifying the operating environment, and for evaluating controller... View full abstract»

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  • Control of diesel engines

    Publication Year: 1998, Page(s):53 - 71
    Cited by:  Papers (165)  |  Patents (24)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2188 KB)

    This article is intended to give control engineers an overview of models and controls of diesel engines. The main emphasis is on the engine's torque generation, including all necessary ancillary devices (turbocharger, injection-system, etc.), pollutant emission and model-based controls. The paper gives a brief introduction of the basic working principles and the salient features of diesel engines ... View full abstract»

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  • Torque management of engines with variable cam timing

    Publication Year: 1998, Page(s):34 - 42
    Cited by:  Papers (30)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (888 KB)

    This paper describe the variable cam timing (VCT) system which addresses both the drivability and emission performance by utilising an electric hydraulic mechanism to rotate the camshaft relative to the crankshaft in order to retard the cam timing with respect to the intake and exhaust strokes of the engine. By retarding the exhaust valve closing further into the intake stroke, more exhaust gas is... View full abstract»

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  • Automotive engine diagnosis and control via nonlinear estimation

    Publication Year: 1998, Page(s):84 - 99
    Cited by:  Papers (33)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1768 KB)

    The aim of this article is to explore a possible approach to the problem of designing control and diagnostic strategies for future generations of automotive engines. The work described focuses on the use of physical models to estimate unmeasured or unmeasurable variables and parameters, to be used for control and diagnostic purposes. We introduce the mean value engine model used, present a concept... View full abstract»

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  • An ion-sense engine fine-tuner

    Publication Year: 1998, Page(s):43 - 52
    Cited by:  Papers (13)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1344 KB)

    The paper presents a real-time closed loop demonstration of spark advance control by interpretation of ionization current signals. Such control is shown to be able to handle variations in air humidity, which is a major factor influencing burn rates, and consequently pressure buildup and useful work transferred via piston to drive shaft. This leads to a clear improvement in engine efficiency compar... View full abstract»

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  • Dynamic modeling and control of hybrid electric vehicle powertrain systems

    Publication Year: 1998, Page(s):17 - 33
    Cited by:  Papers (125)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2316 KB)

    This paper describes the mathematical modeling, analysis, and simulation of a dynamic automatic manual layshaft transmission and dry clutch combination powertrain model, and corresponding coordinated control laws synthesized using a conventional SI ICE powerplant-alternator combination, a dry clutch and manual transmission/differential, variable field alternator, brakes, and complete vehicle longi... View full abstract»

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As the official means of communication for the IEEE Control Systems Society, the IEEE Control Systems Magazine publishes interesting, useful, and informative material on all aspects of control system technology for the benefit of control educators, practitioners, and researchers.

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Jonathan P. How
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