Electromagnetic fuel injection valve

An electromagnetic fuel injection valve comprising:

• a valve housing formed with a fuel injection hole and a valve seat;
• a valve body lifted from a valve closing position contacting with the valve seat to a valve opening position in accordance with excitation of a coil to enable injection of fuel from the fuel injection hole;
• and
• a return spring which returns the valve body to the valve closing position,
• the electromagnetic fuel injection valve allowing a lift of the valve body to the valve opening position to be achieved by settling an overshoot and an overshoot return which occur upon the lift,
• wherein the return spring is an unequal pitch coil spring having a small pitch part small in pitch and a large pitch part large in pitch, and
• wherein the small pitch part exhibits a totally compressed state when a lift amount of the valve body is equal to or greater than a first lift amount smaller than a valve opening lift amount corresponding to the valve opening position, and the large pitch part acts in a case where the lift amount of the valve body is equal to or greater than a second lift amount which is equal to or less than ½ of the valve opening lift amount.