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Internal Block Diagram - Hybrid SUV

The Internal Block diagram provides a mechanism to describe how the parts are related or connected to each other in the context of the whole or owning block. In our example of the Hybrid SUV we can see a connection between the Power sub-system and the Braking subsystem presumably to model power assisted breaking. So, while the Block Definition diagram show the structure in terms of composition, the Internal Block is able to look inside the block and see how it is 'wired' together.

We will see in a later section how a specialized form of the Internal Block diagram, namely the Parametric diagram is used to model systems of mathematical equations.