Browse Publications Technical Papers 1999-01-1332

Emission Control Technologies for EU Stage IV+ EOBD on Small Cars (Part II): Endurance Fleets Management 1999-01-1332

The new European Legislation requires new strategies in order to achieve a reliable emission diagnostic over the entire life of the vehicle (EOBD).
For the validation and the fine-tuning of the new diagnostic controls, the car manufacturers must manage fleets of vehicles in order to evaluate the behavior of these diagnostics over a real aging cycle.
This paper describes a useful tool that has been developed to check the most important diagnostic indexes behavior with aging, that help us in the management of a durability fleet.
The system is composed of:
  • a specific hardware added to the Engine Control Unit (ECU)
  • a real time software for the automatic storage of the most important diagnostic parameters
  • an off line software for data analysis.
During the use of durability car the system runs automatically and does not require any additional operation to the driver (“black-box system”), and no additional skilled people is required for the data acquisition.
Periodically data of each car of the fleet are collected and stored in a personal computer where an expert engineer will analyze the behavior of the fleet with the off line software.


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