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Vehicle emission monitoring device and method thereof

  • US 8,935,084 B2
  • Filed: 12/29/2010
  • Issued: 01/13/2015
  • Est. Priority Date: 12/29/2010
  • Status: Active Grant
First Claim
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1. A vehicle emission monitoring device including instantaneous fuel consumption data and carbon dioxide emission data pre-stored in a memory device thereof from a non-dispersive infrared analyzer on-board emission measurement system (OBS), said vehicle emission monitoring device, comprising:

  • an on-board diagnostic (OBD) connector connecting with an OBD system to receive an OBD instantaneous fuel consumption of said vehicle; and

    a processor electrically connecting with said OBD connector and said memory device to receive information of vehicle statuses, said processor configured to;

    determine;

    (1) an OBS-OBD fuel consumption relationship; and

    , (2) an OBS fuel consumption-carbon dioxide emission relationship from said instantaneous fuel consumption data and said carbon dioxide emission data pre-stored in said memory device from the OBS, said OBS-OBD fuel consumption relationship being determined by defining a distinct set of non-overlapping torque ranges and establishing a corresponding set of distinct equations assigned respectively thereto relating said instantaneous fuel consumption from the OBS to said OBD instantaneous fuel consumption per each corresponding non-overlapping torque range;

    store said OBS-OBD fuel consumption relationship and said OBS fuel consumption-carbon dioxide emission relationship in said memory device;

    obtain an OBD instantaneous fuel consumption;

    selectively determine a calibrated value of said OBD instantaneous fuel consumption based on said OBS-OBD fuel consumption relationship; and

    determine a carbon dioxide emission of said calibrated value as a function of an OBS-OBD fuel consumption-carbon dioxide emission relationship while decoupled from the on-board emission measurement system (OBS).

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