Since the ecu:PowerControlUnit part and ice:InternalCombustionEngine part are connected via these ports, the ecu:PowerControlUnit part may invoke setThrottle and setMixture on the ice:InternalCombustionEngine part via its ice port, across the connector...

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SysML-1.6: References to 'ecu:PowerControlUnit' should be 'pcu:PowerControlUnit'
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OMG Systems Modeling Language (SysML) 1.6
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About Object Management Group copyright in text extracts quoted from OMG specifications for educational purposes
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HSUV sample problem
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This means the provided features of ICE are provided by the ctrl port of InternalCombustionEngine, and required by the ice port of PowerControlUnit, while the required features of ICE are required by the ctrl port of InternalCombustionEngine, and provided
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Since the ecu:PowerControlUnit part and ice:InternalCombustionEngine part are connected via these ports, the ecu:PowerControlUnit part may invoke setThrottle and setMixture on the ice:InternalCombustionEngine part via its ice port, across the connector to the ctrl port of ice:InternalCombustionEngine.
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By invoking these operations, the PowerControlUnit can set the throttle and mixture of the InternalCombustionEngine. The PowerControlUnit can also read properties of the InternalCombustionEngine across the connector to find out the rpm, temperature, ...
SysML-1.6: References to 'ecu:PowerControlUnit' should be 'pcu:PowerControlUnit'
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Figure 9-6 is a fragment of the ibd:PwrSys diagram used in the HybridSUV Sample Problem in Annex D. (The complete diagram is in Figure D.19.)
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