• Title/Summary/Keyword: CAS (Crank Angle Sensor)

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A Study of the Circuit for CPS Signal Using Magnetic Pickup (마그네틱 픽업 방식의 CPS 신호 해석 회로에 관한 연구)

  • Ju, Yong-Wan;Cho, Bong-Su;Baek, Kwang-Ryul
    • Journal of Institute of Control, Robotics and Systems
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    • v.17 no.1
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    • pp.1-5
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    • 2011
  • The basic signals for electronic engine control are velocity and degree of the engine cam shaft. The CPS sensor used for this signal and magnetic pick-up type CPS sensor is more popular. It is very important thing analyze this signal correctly. If there are some mistakes at the analysis, like a noise, The engine do not working at the best status, it will generate some noise, emit exhaust fumes and waste more gases. In general way to analysis this signal, you use zero-level detector circuit and in order to reduce the error you must use another sensor like a TDC sensor. In this paper, We proposed the analysis method using electronics circuits for magnetic pick-up type CPS sensor. We designed Comparison level detector circuit, Differential circuit and Full-rectifier circuit for detected the Long tooth and Short tooth level correctly without another sensor. We expected it is useful for more reliable engine control.

A Study on the Development of an Electronic Control System for Optimal Start and Idle Speed Control in Gasoline Engines (기솔린 기관에서 최적의 시동 및 공회전 속도제어를 위한 전자 제어장치 개발에 관한 연구)

  • 김태훈
    • Journal of Advanced Marine Engineering and Technology
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    • v.25 no.5
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    • pp.1148-1160
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    • 2001
  • An electronic control system of the automobile engine for optimal start and idle speed control has been developed. This system employs the microcoputer-based electronic control unit and crank angle sensor for precise control on fuel injection, ignition timing, and idle speed more quickly and accurately at the start and idling. Consequently, the number of misfire can be reduced during been affected by air flow rate, idle quality(roughness), spark timing, fuel injection, water temperature, and load, Thus, this electronic control system strivers to reach the optimal idle operating point, defined the lowest idle speed(fuel economy) and idle quality(roughness), under any engine operating conditions.

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