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Automated System Test for Car Engine Order Cancellers

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Paper describes the problems to be solved during the design, implementation and testing of Engine Order Cancellation systems (EOC). Special attention is drawn to the black-box tests using industrial computer for modeling the acoustical environment of the car, engine noises, CAN-signals and for evaluating the quality of the system. It is shown that using computer based tests allow detecting problems that either cannot or very hardly can be detected during in-car tests. Block diagram of the automated EOC test system is given. Comprehensive analysis of circumstances that can lead to the problems in EOC is done. Tests for their automatic detection are described.

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