Externally controlled fuel delivery curve adjustment mechanism for a fuel injection pump.

摘要

The fuel injection pump comprises a metering valve and a speed responsive torque control piston (222) which serves as an override for the metering valve to limit the maximum fuel delivery of the pump at variable amounts according to speed. The profile (224) of the torque control piston (222) is a surface of revolution about an axis which is non-parallel to the longitudinal axis of the piston (222) and adjusting means which adjusts and holds the piston in a selected rotational position is accessible externally of the pump.