Centrifugal rpm governor for internal combustion engines

In a centrifugal rpm governor for a fuel injection pump of an internal combustion engine, said pump having a fuel supply control member and a drive shaft, the governor including:

• a housing;
• centrifugal weight means, including regulating springs, mounted within the housing to the drive shaft for rotation with the drive shaft;
• an adjusting member connected to the centrifugal weight means and displaceable by the centrifugal weight means as a function of the rpm of the drive shaft against the force of the regulating springs;
• an intermediate lever connected to the adjusting member and the fuel supply control member;
• a setting member mounted to the housing to arbitrarily move the fuel supply control member by the intermediate lever;
• adjustable stop means adjustable in the direction of the longitudinal axis of the fuel supply control member, said adjustable stop means having a contoured stop surface and serving to determine the full load fuel supply quantity of the fuel pump;
• follower means connected at least indirectly to the intermediate lever for engagement with the contoured stop surface;
• and force accumulator means connected to the intermediate lever, the improvement in the governor comprising:
• an angled shift lever, one arm of which is coupled to the adjusting member and the other arm of which is connected at least indirectly to the intermediate lever, said shift lever serving as a motion translating member and defining a pivot point for the follower means, wherein:
• (i) the force accumulator means is stretched as soon as and as long as the intermediate lever is moved in a direction tending to move the fuel supply control member past the adjustable stop means;
• and
• (ii) the follower means is shifted relative to the contoured stop surface by the adjusting member through the shift lever, when the adjusting member changes the position of the pivot point on the shift lever causing the follower means to engage the contoured stop surface, said shifting movement being proportional to the adapting control stroke of the adjusting member.