A high-accuracy and low-cost cylinder pressure sensor reported in this paper compensates for all major temperature errors encountered in internal combustion engines. The auto-referencing technique maintains sensor calibration compensating for temperature effects on the sensor signal conditioner over the range of -40 to +135°C. In an inexpensive design sensor head materials and dimensions are optimized to compensate for the mid-term thermal errors associated with engine load changes over a temperature range of -40 and 300°C, resulting in the thermal coefficient of sensitivity as low as 0.005%/°C. A miniature, specially shaped diaphragm results in less than 0.5% error associated with rapidly changing combustion gas temperatures. Under non-combustion conditions the sensor offers +/-0.25 - 0.5% accuracy while under combustion conditions the accuracy is typically in the 1- 2% range.


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    Title :

    High-Accuracy Low-Cost Cylinder Pressure Sensor for Advanced Engine Controls


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE 2001 World Congress ; 2001



    Publication date :

    2001-03-05




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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