VALVOLA A FARFALLA PER UN MOTORE A COMBUSTIONE INTERNA CON LA POSSIBILITA' DI REGOLARE LA POSIZIONE DI LIMP-HOME E RELATIVO METODO DI REGOLAZIONE DELLA POSIZIONE DI LIMP-HOME

A throttle valve (1) having: a valve body (2); an intake duct (4) obtained in the valve body (2); a throttle plate (5) arranged in the intake duct (4); a shaft (6) mounted so as to rotate, supporting the throttle plate (5); an electric motor (3); a gear transmission (8), which couples the electric motor (3) to the shaft (6) and has an end gear (10) which is integral with the shaft (6); a return spring (14), which is designed to rotate the throttle plate (5) towards a closing position; a striking element (16), which is obtained in the valve body (2) and establishes an intermediate position of partial opening; and a countering spring (15), mounted on the end gear (10), which is designed to rotate the throttle plate (5) towards the intermediate position and has one end (21) which is designed to rest against the striking element (16) during the rotation of the end gear (10).