MULTIMODAL HYBRID DRIVE SYSTEM FOR VEHICLES EQUIPPED WITH PTO AND HYBRID VEHICLE EQUIPPED WITH PTO COMPRISING SAID DRIVE SYSTEM

Multimodal hybrid drive system for vehicles equipped with PTO, the system comprising an internal combustion engine (E), a first electric motor generator (D) and a second electric motor generator (C); wherein at least said first electric motor generator has a drive shaft having opposite ends, both accessible, wherein one of said ends defines a PTO which can be activated by means of a relative controllable joint (K), a transfer box (T) comprising three selectively connectable inputs (IN1, IN2, IN3) and a single output (OUT) intended to be associated with a vehicle driveline; wherein a first input (IN1) is intended to be associated with said internal combustion engine (E) by means of a relative controllable joint (A), a second input (IN2) is intended to be associated with said first electric motor generator (D) by means of a respective free end of a respective drive shaft and said third input (IN3) is intended to be associated with said second electric motor generator (C) by means of a respective free end of a respective drive shaft, and a fixed transmission ratio between each of said inputs (IN1, IN2, IN3) and said single output (OUT).