Development of a Virtual Sensor for Estimation of Gas Temperature in a Diesel Engine Exhaust Manifold


Greater sophistication of control systems is driving an increase in the number of sensors installed in the engine. In response, the authors are working to develop a virtual temperature sensor that can operate on the ECU in order to reduce cost and monitor sensor reliability. This paper reports on a virtual sensor that estimates exhaust manifold gas temperature and the response model for the actual temperature sensor. The model for estimating exhaust manifold gas temperature was prepared based on the equation of energy conservation in the cylinder, and variation in indicated thermal efficiency is expressed by an empirical formula based on the measurement results. In addition, the response delay of the actual temperature sensor is modeled as a second-order transfer function with variable time constants, and variations in the time constants are calculated based on the heat transfer model. Estimated accuracy was checked in simulation of transient test cycle, and the proposed model was confirmed to have adequate accuracy as a virtual sensor.近年,エンジン制御システムの高度化に伴い搭載されるセンサの数は増加している.センサ削減によるコスト低減や他の温度センサの合理性診断を目的として,ECU上での動作が可能な簡易な温度推定モデル(バーチャルセンサ)を開発した.本発表では,エンジンの排気温度および温度センサの応答遅れのモデル化について報告する.


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  • Accession Number: 01666875
  • Record Type: Publication
  • Source Agency: Japan Science and Technology Agency (JST)
  • Files: TRIS, JSTAGE
  • Created Date: Jan 31 2018 3:19PM