Abstract: An engine includes a cylinder having a spindle and a pulley attached to the spindle, a supercharger includes a receptacle having an air intake port, a gear rotatably supported in the receptacle with a shaft, another pulley attached to the shaft, and a coupling member engaged with the pulleys for allowing the gear to be rotated and driven by the spindle, and a turbine is rotatably supported in the receptacle with an axle and aligned with the air intake port of the receptacle, and coupled to the gear for allowing the turbine to be driven by the gear and to draw an air from ambient into the air intake port and into the cylinder and for supercharging the intake air to increase the fuel consumption effect.