Abstract: In a plunger type electromagnetic fuel pump, a cost reduction is achieved by reducing a number of parts in conjunction with a layout of a check valve and making a cleaning step after assembling unnecessary. In an electromagnetic fuel pump (1) which pressure-feeds a fuel from a pressurizing chamber (6) formed on the front side of a plunger (3) by controlling a current application to an electromagnetic coil (5) and repeating generation and elimination of a magnetic force so as to slidably reciprocate the plunger (3) arranged in a cylinder (4), spring retaining members (36) provided with spring guides (361) retaining proximal end sides of return springs (33) urging valve members (32, 32) of check valves (30, 70) forming the pressurizing chamber (6) integrally has fixing structures for fixing them to mounting positions, and are fixed without using the other fixing means.

Abstract: The invention can secure an improved pump operation while minimizing a loss of a magnetomotive force generated by an electromagnetic coil and making it possible to achieve a compact structure and a weight saving of an apparatus, in a plunger type electromagnetic fuel pump. In an electromagnetic fuel pump (1) which pressure-feeds a fuel by controlling a current application to an electromagnetic coil (5) and repeating generation and elimination of a magnetic force so as to slidably reciprocate a plunger (3) arranged in a cylinder (4) and having a proximal end side urged by a return spring (41), an insertion hole (35) for inserting the return spring (41) is provided from the proximal end surface of the plunger (3) at a predetermined depth along the center axis of the plunger (3), and the inner peripheral surface of the insertion hole (3) is formed as a spring guide retaining the outer peripheral leading end side of the return spring (41).

Abstract: The invention provides an electromagnetic fuel injection valve which is operated extremely normally, is excellent in a durability, can always obtain a stable injection amount, and can reduce an influence by a fuel, an atmospheric temperature and the like.