It's the "green mover max." The front and back cars only have one axle, and the middle car has two axles and the motor. The couplings are much different that typical plarail trains. I think there's a thread on here somewhere with more information.
https://en.wikipedia.org/wiki/Green_Mover_Max
If you search for green mover max in ebay you should find some used versions that show it's oddities.
https://en.wikipedia.org/wiki/Green_Mover_Max
If you search for green mover max in ebay you should find some used versions that show it's oddities.
![[-]](https://www.blueplastictracks.org/images/collapse.png)