Hello,
I don't own the Powertrain Blockset. But I did need to export data vectors from my base workspace to simulink. For that, you need to compute your data as a 1D vector and use the Repeating Sequence Interpolated block and set it to use your vector. Don't forget to set your simulation time as long as the length of your time vector.
Alternatively, you can use your function of time in a Matlab Function block and connect the simulation time as input.
