Diesel fuel injection pump with adaptive torque balance control

In an engine driven distributor type fuel injection pump and diesel engine combination wherein the pump includes a housing means with an injection pump means and distributor means therein for sequentially supplying pressurized fuel via discharge passage means to a plurality of injection nozzles associated with the cylinders of the associate engine, a transfer pump for supplying fuel via inlet passage means to the injection pump means and, a governor controlled, mechanical metering valve operatively positioned in the inlet passage means for normally controlling fuel flow to the injection pump means, the improvement comprising:

• a solenoid actuated valve means operatively associated with said inlet passage means in a series position between said transfer pump and said injection pump means;
• and, an adaptive torque balancing electronic controlled electric power source connected to said solenoid actuated valve means, said adaptive torque balancing electronic controlled electric power source including speed sensing means operatively associated with the engine to measure the effective speeds of the cylinders of the engine whereby said adaptive torque balancing electronic controlled electric power source is operative to energize said solenoid actuated valve means so as to supplement the metering valve control of fuel flow from said transfer pump to said injection pump means so that the fuel flow to the injection pump means and from the injection pump means to each of the respective injection nozzles for each of the cylinders is controlled as a function of the incremental speed difference per preselected degrees of movement among the respective cylinders of the engine over a predetermined range of engine operation whereby in said range the torque outputs of the cylinders of the engine are substantially equal.

In an engine driven distributor type diesel fuel injection pump having a housing means with an injection pump means and distributor means therein for sequentially supplying pressurized fuel via discharge passage means to a plurality of injection nozzles associated with the cylinder of an associate engine, and a transfer pump for supplying fuel via inlet passage means to the injection pump means and, a governor controlled, mechanical metering valve operatively positioned in the inlet passage means for controlling fuel flow to the injection pump means, the improvement comprising:

• a solenoid actuated valve means operatively associated with said inlet passage means in a position between said transfer pump and said injection pump means, an electronic controlled electric power source connected to said solenoid actuated valve means, whereby said solenoid actuated valve means is operative to supplement the metering valve control of fuel flow from said transfer pump to said injection pump means whereby the fuel flow to the injection pump means and from the injection pump means to the respective injectors for each of the cylinders is controlled, said electronic controlled electric power source including means to provide signals relative to the time differences between combustion events in the respective cylinders and means to calibrate a fuel modifier signal based on cylinder speed differences which is used to control the electrical signal to said solenoid actuated valve means in accordance with the algorithm:
• ##EQU2## wherein:
• T.sub.1 =Time for an initial portion of the angle interval between combustion events for cylinder.sub.i and cylinder.sub.i+1 ;
• T.sub.2 =Time for a later portion of the angle interval between combustion events for cylinder.sub.i and cylinder.sub.i+1 ;
• and,
• K.sub.1 =A preselected integral gain factor.