Fuel injection pump for internal combustion engines

Claim 1

A fuel injection pump for internal combustion engines comprising a housing, at least one pump piston having an axis and arranged to execute a reciprocating working stroke in a pump cylinder in said housing and thereby define a pump work chamber, a blind bore in said piston extending from at least one relief bore to said pump work chamber, a control slide axially movable and rotatable on said at least one pump piston, for controlling said at least one relief bore disposed in said pump piston, whereby said at least one relief bore may be opened and closed to control fuel flow to and from said pump work chamber, a rotatable axially movable governor rod coupled with said control slide for actuation thereof, said governor rod being axially displaceable for rotary movement of said control slide and disposed transversely relative to said pump piston axis, an adjustable slit hub coupling disposed between said governor rod and said control slide, said adjustable slit hub coupling including a driver arm, said driver arm including a terminal portion adapted to be positioned between opposed working surfaces on said control slide, said working surfaces are arranged to extend transversely to said pump piston axis for axial movement of said control slide, and said control slide is provided with a rotationally positively joined tang which engages a driver recess on said slit hub by which upon axial movement of said governor rod carries said control slide along in order to effect a rotational movement of said control slide.