New vehicle control algorithms are needed to meet future emissions and fuel economy mandates that are quite likely to require a measurement of ambient specific humidity (SH). Current practice is to obtain the SH by measurement of relative humidity (RH), temperature and barometric pressure with physical sensors, and then to estimate the SH using a fit equation. In this paper a novel approach is described: a system of neural networks trained to estimate the SH using data that already exists on the vehicle bus. The neural network system, which is referred to as a virtual SH sensor, incorporates information from the global navigation satellite system such as longitude, latitude, time and date, and from the vehicle climate control system such as temperature and barometric pressure, and outputs an estimate of SH. The conclusion of this preliminary study is that neural networks have the potential of being used as a virtual sensor for estimating ambient and intake manifold's SH.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    A Preliminary Study of Virtual Humidity Sensors for Vehicle Systems


    Additional title:

    Sae Technical Papers


    Contributors:
    Fang, Chen (author) / Weber, David (author) / MacNeille, Perry (author) / Dai, Qi (author) / Wang, Xipeng (author) / Murphey, Yi (author)

    Conference:

    SAE 2014 World Congress & Exhibition ; 2014



    Publication date :

    2014-04-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    A Preliminary Study of Virtual Humidity Sensors for Vehicle Systems

    Fang, C. / Wang, X. / Dai, Q. et al. | British Library Conference Proceedings | 2014


    Ambient humidity virtual sensor

    SUN MINGQIU / EDWARDS DAVID E / SMITH CHRISTOPHER P et al. | European Patent Office | 2024

    Free access

    Humidity control for olfaction sensors

    VARUGHESE SIBU / NESPOLO MARTÍN / KRZYZAK THOMAS et al. | European Patent Office | 2025

    Free access

    AMBIENT HUMIDITY VIRTUAL SENSOR

    SUN MIN / EDWARDS DAVID EUGENE / SMITH CAMERON PAUL et al. | European Patent Office | 2024

    Free access

    HUMIDITY CONTROL FOR OLFACTION SENSORS

    VARUGHESE SIBU / NESPOLO MARTÍN / KRZYZAK THOMAS et al. | European Patent Office | 2022

    Free access