INTERNAL COMBUSTION ENGINE, VEHICLE EQUIPPED WITH SAME, AND CONTROL METHOD THEREFOR

An S/C (15) and a T/C (14) are provided, a load sensor (S1) detecting a traction load (W1) of a trailer (3) towed by a semi-trailer (1) is arranged in a coupler (5a), a combined supercharging by the S/C (15) and the T/C (14) is performed in the case where the traction load (W1) is heavier than a previously defined traction determination value (Wn), and a single supercharging only by the T/C (14) is performed in the case where the traction load (W1) is not more than the traction determination value (Wn). Accordingly, it is possible to perform the supercharging adapted to increase and decrease of a load applied to a vehicle.