A control method using an in-cylinder pressure sensor can directly and precisely control engine combustion, lowering harmful emissions and fuel consumption levels. However, this method cannot be applied to a conventional engine management system because of its inaccuracy and the high cost of the pressure sensor, as well as the high computational load. In this study, we propose a real-time IMEP estimation method for a common rail direct injection diesel engine using the difference pressure integral as a cylinder pressure variable. The proposed method requires less computational load, enabling the IMEP to be estimated in real-time. In addition, we validated the estimation algorithm through simulation and engine experiments. The IMEP was accurately estimated with a small root mean square error of below 0.2305 bar.
Real-time IMEP Estimation for Torque-based Engine Control using an In-cylinder Pressure Sensor
Sae Technical Papers
SAE World Congress & Exhibition ; 2009
20.04.2009
Aufsatz (Konferenz)
Englisch
Real-time IMEP estimation for torque-based engine control using an in-cylinder pressure sensor
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