As I said before this does not appear to be true fuel injection but more like a smart carburetor, probably could not
be called true throttle body injection either, but still could work very well, you can map throttle position, RPM to give load the
numbers and use a look-up table to deliver the correct air/fuel ratio for the given load point.
With this type of system you don't get all the compensation for other atmospheric variables, some chain saws have used
similar systems.