• Title/Summary/Keyword: nonlinear engine map

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Nonlinear Control of Torque and Speed of S.I.Engines Using Electric Throttle Control (트로틀 앵글 제어에 의한 내연기관의 토오크 및 속도의 비선형 제어)

  • 원문철;강병배;박문수;김태영
    • Transactions of the Korean Society of Automotive Engineers
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    • v.7 no.6
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    • pp.72-81
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    • 1999
  • A nonlinear engine torque and speed control algorithm using throttle angle control is developed with an engine load torque estimation algorithm. Three 3-dimensional nonlinear engine maps as a part of the nonlinear control algorithm are obtained from steady state engine dynamometer tests. An electric throttle actuator is developed using a stepper motor and a 8 bit micro-processor. The speed control and external load estimation algorithm are tested via engine speed control experiments, and show performance good enough for using various engine torque and speed control applications.

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Design of Optimal Idle Speed Controller by Sliding Mode Observer (슬라이딩 모드 관측기에 의한 최적의 공회전 제어기 설계)

  • Lee, Young-Choon;Lee, Seong-Cheol
    • Journal of the Korean Society for Precision Engineering
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    • v.18 no.10
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    • pp.161-167
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    • 2001
  • This paper presents an approach to nonlinear engine idle controller and intake manifold absolute pressure(MAP) observer based on mean torque production model. A stable engine idle speed is important in that the unstable engine Idle mode can make engine to drooping or stall state. A sliding fuzzy controller has been designed to control engine idle speed under load disturbance. A sliding observer is also developed to estimate the intake manifold absolute pressure and compared with the actual MAP sensor value. The sliding mode observer has shown good robustness and good tracking performance. The inputs of sliding fuzzy controller are the errors of rpm and MAP. The output is a duty cycle(DC) for driving a idle speed control valve(ISCV).

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An Experimental Study upon Modeling and Control of Coupled Engine and Generator System (엔진-발전기 시스템 모델링 및 제어특성에 관한 실험적 연구)

  • 송승호;정세종;오정훈;함윤영;최용각;이광희
    • Transactions of the Korean Society of Automotive Engineers
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    • v.11 no.5
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    • pp.163-169
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    • 2003
  • Modeling of engine-generator system and its control responses are investigated using high performance generator controller. The nonlinear engine is modeled using mean torque production model based on experimental engine map. In case of diesel engine. the amount of injected fief is decided by engine controller depending on the APS(Acceleration Position Sensor) value. An electromechanical generator model contains electrical circuits and moment of inertia. The generator controller maximizes the performance of generator using decoupling and linearized current feedback control. The generator control system consists of 3-phase IGBT inverter and controller board based on 32 bit floating point DSP. Field oriented control algorithm with digital current feedback control at 10kHz sampling enabled high performance torque and speed control of induction machine. Not only the steady state but also the transient state responses can be evaluated through a batch test of the engine generator system. Developed engine and generator modeling and control can be utilized in various applications such as Series Hybrid Electric Vehicle(SHEV), engine-generator for emergency, and other hybrid generation systems.