Fuel injection pump

A fuel injection pump comprising:

• a rotatable cam;
• a drive shaft for transmitting a rotational force to said cam;
• at least two fuel pressure chambers for pressurizing fuel;
• at least two fuel inlet passages for transmitting fuel pressurized in said respective fuel pressure chambers;
• a moving member for reciprocating according to a rotation of said cam to pressurize fuel in said fuel pressure chambers and to transmit said pressurized fuel to said pressure feed fuel passages;
• at least two cylinder heads forming said respective fuel pressure chambers thereinside;
• and
• a main housing for rotatably supporting said drive shaft, wherein;
• each of said pressure feed fuel passages includes a communication port for communicating with said fuel pressure chamber;
• each of said pressure feed fuel passages includes a fuel outlet;
• each of said pressure feed fuel passages includes a first check valve for allowing fuel flow from said communication port toward said fuel outlet and for inhibiting a reversed fuel flow from said fuel outlet toward said communication port;
• each of said fuel inlet passages includes a second check valve for allowing a fuel flow into said fuel pressure chamber and for inhibiting a fuel flow from said fuel pressure chamber, and
• said pressure feed fuel passages are formed in said cylinder heads, respectively.

A fuel injection pump comprising:

• a rotatable cam;
• a drive shaft for transmitting a rotational force to said rotatable cam;
• at least two fuel pressure chambers for pressurizing fuel;
• at least two pressure feed fuel passages for transmitting fuel pressurized in said respective fuel pressure chambers;
• at least two moving members for reciprocating according to a rotation of said cam to pressurize fuel in said fuel pressure chambers and to transmit said pressurized fuel to said pressure feed fuel passages;
• at least two individually formed cylinder heads made of metal, and forming said respective fuel pressure chambers thereinside, said cylinder heads slidably receiving said moving members;
• and
• a main housing for supporting said respective cylinder heads such that said moving members reciprocate, and for rotatably supporting said drive shaft, wherein;
• each of said pressure feed fuel passages includes a communication port for communicating with a respective said fuel pressure chamber;
• each of said pressure feed fuel passages includes a fuel outlet;
• and
• said pressure feed fuel passages are formed in said cylinder heads, respectively.