ELECTROMAGNETIC FUEL INJECTION VALVE

PURPOSE:To reduce abrasion of an impulse portion and provide excellent abrasion resistance even in alcohol fuel with low oil content by forming valve-body impulse surface over half of more part of the periphery of a vertical section in the valve-body axial direction. CONSTITUTION:The seat surface 4e receiving push force of a return spring 8 of a needle 4 is inclined for 5 deg.-10 deg. for the center line C. Accordingly, due to this inclination, a force component F in the lateral direction perpendicular to the center line C of the needle of a spring force P of the return spring 8 is applied to the inclined seat surface 4e. Because of this force component F, the outer peripheral surface on the right side of a guide 4b is pressed to the inner peripheral surface 3c of the body 3, and the outer peripheral surface of the left side of a guide 4c is pressed to the inner peripheral surface 3c of the body 3. On the outer peripheral surface of the side not pressed to the inner peripheral surface 3c of the body 3 of the guide 4b, there are formed two chamfers 16 of equal shape; the total arc is set at less than 1/2 of the whole circuit of the guide 4b.