Excess fuel starting device for fuel injection engines

摘要

The invention relates to an excess fuel starting device for a fuel injection engine having a hydraulic actuator (40) to position a full load stop (36) coacting with the engine throttle linkage to control the fuel input from the fuel injection pump to the engine in either a normal run position or an excess fuel position. The actuator includes an excess fuel piston (50) connected to the full load stop and spring biased toward an excess fuel position. A bore (90) within the piston contains a free piston (92) slidable therewithin. Fluid conduit means (102) deliver a pressurised fluid, during engine operation, to actuate only the smaller free piston when the actuator is in the excess fuel position. When the piston (50) has been moved by the action of the free piston (92) to the normal run position, the pressurised fluid provides holding force. The differential in the actuating pressure versus the holding pressure of the device may be varied to suit the installation requirements by the choice of the relative diameters of the pistons (50 and 92).