The software of engine management systems are getting larger and more complex rapidly, in order to meet requirement for fuel efficiency and low exhaust. And so some systematic software design approachs are required. In this study, we measures the maximum execution time of each task using a tool which is used as an on-board evaluation environment of an engine management system, and tests the utilization bound test and with a necessary and sufficient test. We adopted generalized multiframe task model and the maximum interference function(MIF) which checks the condition efficiently for schedulability test. In this paper, we describe that applying RMA to an engine management system and developed schedulability analysis method.
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