OBD “dry-run” Certification

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Customer: Tier 1 supplier to the automotive industry

Market: Light duty on highway – North American market

BRACE execution: OBD Competence Cluster

Location: BRACE offices & Customer test facilities

For a Diesel fuel system for passenger car vehicles for the North-American market a “dry-run” or internal OBD certification was executed by BRACE Automotive. The customer needed an independent view on whether their OBD on the Diesel fuel system really was ready for certification. Based on a demonstrator vehicle BRACE Automotive performed the complete OBD certification with regards to the fuel system.

BRACE Automotive used software specifications and interviews of system experts to understand how the fuel system was working and to create relevant chapters of Base Emissions Control Strategy document and to identify what Auxiliary Emissions Control Devices were present. Based on this information BRACE Automotive identified what diagnostics would be needed.

BRACE Automotive then created and wrote all OBD certification documentation for those diagnostics that are already present and identified where diagnostics were still missing. OBD Documentation must be made according to legislator defined templates and must be both technically comprehensive and easy to understand for an outsider. OBD Documentation is provided in the form of a summary table, a textual description with backgrounds and flowcharts.

BRACE Automotive created a test plan and test protocol for the relevant OBD Demonstration testing and Production Vehicle Evaluation – Monitor (PVEII) testing. These tests are needed at type approval and several months after production has started. BRACE Automotive guided a customer test engineer at the customer facilities through the testing. For the OBD demonstration the testing was executed on a chassis dyno with emission testing equipment where FTP75 and Unified cycles were used.