Injection timing modulator

Claim 1

A multiple plunger fuel injection pump for an internal combustion engine comprising, a pump housing means defining a plurality of bores, a plunger received in each of said bores and defining a fuel injection pumping chamber, means defining a fuel supply chamber, each of said plungers defining passage means selectively communicating between the supply chamber and the injection pumping chamber for supplying fuel to said injection pumping chamber, a control sleeve mounted for reciprocable and rotational movement about each of said plungers and defining port means with said plunger for controlling the closing and opening of said passage means in said plunger between the supply chamber and the fuel injection pumping chamber, means sequentially reciprocating each of said plungers in said bores for pumping fuel in said fuel injection pumping chamber, a speed responsive device adapted for connection to an engine including a control member moving in response to engine speed, a drive lever defining a drive arm, a timing arm and a quantity control arm, means connecting said drive arm to said control member of said speed responsive device, a control rod connected to each of said control sleeves providing rotational and reciprocating movement of said control sleeves, a quantity control linkage connected between said quantity control arm and said control rod reciprocating said control rod and rotating said control sleeves, a throttle control pivotally connected to said quantity control linkage to modify movement of said control rod in response to movement of said throttle control, a timing linkage connected between said timing arm and said control rod rotating said control rod and reciprocating said control sleeves, a variable fulcrum timing modulation lever in said timing linkage for modifying fuel injection timing, said linkages thereby controlling the quantity, timing and modulation of fuel delivery from said fuel injection pump.