Introduction to On Board Diagnostics (II)

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Introduction to On BoardDiagnostics (II)The U.S. Federal Government has published test procedures that include iseveral steps such as Dynamometer test, Hydro Carbons Analyzer, and otherAnalyzers. The vehicle is operated according to a prescribed schedule of speed and loadto simulate highway driving as well city driving. The emissions are then measured usingthe above instruments. Standards have been set for the vehicle half-life life (5 years or 50000miles which ever comes first) and full cycle (10 years or 100000 miles). The followingstandards are enforced 100% after 1996:• HC 0.31 gms /mile• CO 4.20 gms/mile• NOx 0.60 gms/mile (non-diesel)• 1.25 gms/mile (diesel)
Introduction to On BoardDiagnostics (II)These FTP regulations are enforced by EPA for all Light andMedium Duty vehicles made in U.S.A. The standards forEuropean and Asian made vehicles have different standardswhich are more relaxed.The European and Asean standards are not yet completelyfinalized by their countries.
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OBD II for L & MD VehiclesSTD Manua
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Fundamentals of PowertrainControl s
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The Freeze Frame can also be used f
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Evaporative System Monitoring: Hydr
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OBD(II)In addition the electrical c
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Sensors and ActuatorsEmployed in OB
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Sensors and ActuatorsKnock sensorEm
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Secondary air valvesSensors and Act
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Functionality of PowertrainControl
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Introduction to On Board Diagnostics (II)

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