Method and apparatus for controlling fuel injection pump

Claim 1

A method for controlling a fuel injection pump, characterized by a first step of taking in an external command for acceleration and deceleration and taking in at least one operation parameter of an engine; a second step of deriving a first control parameter for most suitably controlling a first actuator which sets the amount of fuel to be injected, according to the external command and the operation parameter; a third step of calculating a first control quantity according to the first control parameter, the first control quantity controlling the first actuator (16); and a forth step of correcting the first control quantity according to an actually controlled quantity which is detected by a position sensor (43-48) of the first actuator (16).

Claim 2

A method for controlling a fuel injection pump, characterized by a first step of taking in an external command for acceleration and deceleration and taking in at least one operation parameter of an engine; a second step of deriving a first control parameter for most suitably controlling a first actuator which sets the amount of fuel to be injected, according to the external command and the operation parameter; a third step of calculating a first control quantity according to the first control parameter, the first control quantity controlling the first actuator (16); and a forth step of correcting the first control quantity according to an actually controlled quantity which is detected by a position sensor (43-48) of the first actuator (16).

Claim 4

An apparatus for controlling a fuel injection pump for an internal combustion engine, characterized by a first electric actuator (16) for controlling amount of fuel to be injected from.said fuel injection pump; a means (103) for detecting at least one operation parameter (112-116) of said internal combustion engine; a means (100-103) for deriving at least one control parameter based on at least one signal from said means for detecting at least one operation parameter; a means (100-103; 114) for operating a control quantity for said first electric actuator (16) according to the control parameter; a means (113) for detecting an output (120) from said first electric actuator; and a means for correcting the control quantity from the control quantity operating means, in such a manner that the output from said first electric actuator is equalized to the control quantity from said control quantity operating means (104).

Claim 5

An apparatus for controlling a fuel injection pump for an internal combustion engine, characterized by a first electric actuator (16) for controlling amount of fuel to be injected from.said fuel injection pump; a means (103) for detecting at least one operation parameter (112-116) of said internal combustion engine; a means (100-103) for deriving at least one control parameter based on at least one signal from said means for detecting at least one operation parameter; a means (100-103; 114) for operating a control quantity for said first electric actuator (16) according to the control parameter; a means (113) for detecting an output (120) from said first electric actuator; and a means for correcting the control quantity from the control quantity operating means, in such a manner that the output from said first electric actuator is equalized to the control quantity from said control quantity operating means (104).

Claim 9

An apparatus for supplying fuel to a fuel injector, characterized by (1) a fuel pump having; (a) a delivery valve (19) connected to an injection valve, said delivery valve being adapted to open when fuel pressure reaches a predetermined value, (b) a plunger (5) reciprocated by a cam (1) rotating in synchronism with engine revolution, said plunger having an internal passage (5A) that forms a high pressure chamber together with said delivery valve (19). (c) a spill ring (6) slidably and rotatably mounted on an outer surface of said plunger (5) in order to change area of a notch formed on said plunger communicating with said internal passage (5A) and thereby to determine the amount of fuel to be injected, (2) a lever (9) for rotating and sliding said spill ring (6); (3) an electromagnetic actuator (11, 16) having; (d) an electromagnetic coil (36), (e) an armature (31, 32) connected to said lever (9) and changing its position when said electromagnetic coil (36) is energized; (4) a position sensor (43-48) assembled together with said electromagnetic actuator and converting displacement of said armature into an electrical signal; (5) a computer (100-133) for controlling current which is supplied to said electromagnetic coil, said computer taking in an electrical signal from said position sensor (43-48) in order to correct the current; whereby said electromagnetic actuator is electrically controlled.

Claim 10

An apparatus for supplying fuel to a fuel injector, characterized by (1) a fuel pump having; (a) a delivery valve (19) connected to an injection valve, said delivery valve being adapted to open when fuel pressure reaches a predetermined value, (b) a plunger (5) reciprocated by a cam (1) rotating in synchronism with engine revolution, said plunger having an internal passage (5A) that forms a high pressure chamber together with said delivery valve (19). (c) a spill ring (6) slidably and rotatably mounted on an outer surface of said plunger (5) in order to change area of a notch formed on said plunger communicating with said internal passage (5A) and thereby to determine the amount of fuel to be injected, (2) a lever (9) for rotating and sliding said spill ring (6); (3) an electromagnetic actuator (11, 16) having; (d) an electromagnetic coil (36), (e) an armature (31, 32) connected to said lever (9) and changing its position when said electromagnetic coil (36) is energized; (4) a position sensor (43-48) assembled together with said electromagnetic actuator and converting displacement of said armature into an electrical signal; (5) a computer (100-133) for controlling current which is supplied to said electromagnetic coil, said computer taking in an electrical signal from said position sensor (43-48) in order to correct the current; whereby said electromagnetic actuator is electrically controlled.