DESIGNING ON-BOARD DIAGNOSTICS FOR LIGHT AND MEDIUM DUTY EMISSIONS CONTROL SYSTEMS
On-board diagnosis of engine and transmission systems has been mandated by government regulation for light and medium vehicles since the 1996 model year. The regulations specify many of the detailed features that on-board diagnostics must exhibit. In addition, the penalties for not meeting the requirements or providing in-field remedies can be very expensive. This course is designed to provide a fundamental understanding of how and why OBD systems function and the technical features that a diagnostic should have in order to ensure compliant and successful implementation. Fundamental design objectives and features needed to achieve those objectives for generic on- board diagnostics will be covered. The course will also include a review of the California Air Resources OBD II regulation, providing students with a firm foundation for reading and understanding the requirements, including the in-use rate portion of the regulations and how to properly calculate and output the required rate information. Relationships between the regulation and various SAE and ISO recommended practices will be reviewed. The course will also explore the relationship of the OBD system with the underlying control system. LEARNING OBJECTIVES By attending this seminar, you will be able to: • Articulate the underlying design objectives of on-board diagnostic systems • Use the latest California Air Resources Board On-Board Diagnostic Regulation for Light and Medium Vehicles to find and apply OBD requirements • Apply the design features that all diagnostics need for successful implementation • Design diagnostics to comprehend variation • Successfully implement algorithms to track in- use rates in accordance with the CARB OBD II Regulation • Use SAE J1979 to implement generic scan tool support in diagnostic design • Implement OBD design requirements in control system design
“Outstanding course. Recommended to anyone involved with emissions.”
Homayoun Ahari Diesel AT Tech Expert Chrysler
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