Distribution type fuel injection pump

A fuel injection pump for use in a fuel injected internal combustion engine having a fuel feed pump, said fuel injection pump comprising:

• a housing having a fuel chamber contained therein, said fuel chamber being supplied with fuel by said fuel feed pump and being pressurized to the output pressure of said fuel feed pump;
• a plunger having a longitudinal axis of movement, said plunger being movably mounted and forming a compression chamber within said housing at one end portion of said plunger, said plunger having a delivery stroke and a suction stroke;
• driving means for reciprocally moving said plunger along said axis and for rotating said plunger about said axis;
• fuel supply means for introducing fuel into said compression chamber during said suction stroke;
• delivery port means for feeding fuel into the engine from said compression chamber during said delivery stroke;
• a leak port formed in said plunger and connected to said compression chamber;
• a control sleeve movably mounted on said plunger for normally closing said leak port and for connecting said leak port to said fuel chamber at the end of said delivery stroke to complete said delivery stroke;
• a governor device actuating said control sleeve for controlling the quantity of fuel to be injected;
• a first passage formed in said control sleeve and connected to said fuel chamber;
• a second passage formed in said plunger and connected to said compression chamber, said second passage being arranged for normal connection with said first passage once per one stroke of said plunger at the beginning of said delivery stroke;
• and
• actuating means for rotating said control sleeve about said plunger to connect said first passage to second passage during said suction stroke and to disconnect said first passage from said second passage during said delivery stroke during the starting operation of said internal combustion engine, said actuating means being responsive to the output pressure of said fuel feed pump to sense the completion of the starting operation and thereby connect said first passage to said second passage during said delivery stroke.