Fluid or fuel injection pump assembly

Claim 2

A fuel injection pump means for an internal combustion engine having a plurality of cylinders, comprising: a plurality of reciprocable pumping means, one for each cylinder; engine driven means coupled to said plurality of reciprocable pumping means for reciprocating said reciprocable pumping means; means operable for controlling the amount of fuel pumped by said plurality of reciprocable pumping means; means coupled to certain of said reciprocable pumping means and responsive to a predetermined state of said means operable for controlling the amount of fuel pumped by said plurality of reciprocable pumping means for arresting the reciprocation of said certain of said reciprocable pumping means whereby fuel delivery is cut off from said certain of said reciprocable pumping means; said means coupled to said certain of said reciprocable pumping means and responsive to a predetermined state of said means operable for controlling the amount of fuel pumped by said plurality of reciprocable pumping means comprising a detent means positioned adjacent each of said certain of said reciprocable pumping means and engagable in depressions positioned in said certain of said reciprocable pumping means, valve means movable between a first position and a second position, a source of fluid under pressure coupled to said valve means, and fluid operable means coupled to said valve means and to said detent means for engaging said detent means in said depression in said certain of said reciprocable pumping means when Said valve means is in said first position and for disengaging said detent means from said depression in said depression in said certain of said reciprocable pumping means when said valve means is in said second position.

Claim 3

The combination of claim 1 in which said valve means is rotatably mounted in said fuel injection pump means, and further comprising an electromagnetic actuating means, and means coupling said valve means with said electromagnetic actuating means for rotating said valve means from one of said positions to the other of said positions when said electromagetic actuating means is energized.

Claim 4

The combination of claim 1 in which a valve means is provided for each of said detent means and each of said valve means is rotatably mounted in said fuel injection means for rotatable movement from said first position to said second position, and further comprising an electromagnetic actuating means and means coupled to each of said valve means and said electromagnetic actuating means for rotating each of said valve means from said second position to said first position when said electromagnetic actuating means is energized, and means for energizing said electromagnetic actuating means when said predetermined state of said means operable for controlling the amount of fuel pumped by said reciprocable pumping means is present.

Claim 5

The combination of claim 3 in which said predetermined state is a state in which the quantity of fuel pumped is low compared with the full quantity of fuel capable of being pumped by said plurality of reciprocable pumping means.

Claim 6

An injection pump assembly comprising, in combination: a stationary housing having a central bore and a source of fluid under pressure connected to said bore; a rotatable drive shaft mounted in said bore; a plurality of reciprocable fluid pumping means; means coupling said rotatable drive shaft and said plurality of reciprocable fluid pumping means for reciprocating said plurality of reciprocable fluid pumping means; said plurality of reciprocable fluid pumping means each having a fluid discharge passage; fluid metering means for metering the amount of fluid pumped by said plurality of reciprocable fluid pumping means; external movable means coupled to said fluid metering means for varying the amount of fluid pumped by said plurality of fluid pumping means; and means coupled to said external movable means and certain of said plurality of fluid pumping means for arresting the reciprocation of said certain of said plurality of fluid pumping means when said external movable means is in a predetermined position whereby pumping of fluid by said certain of said plurality of reciprocable fluid pumping means and discharge of fluid from the associated fluid discharge passage is terminated, each of said certain of said plurality of fluid pumping means having a groove positioned in the outer surface thereof; said means for arresting the reciprocation of said certain of said plurality of fluid pumping means comprising a detent means positioned adjacent each of said certain of said plurality of fluid pumping means and movable into said groove when said external movable means is in said predetermined position, fluid operable means coupled to said detent means for moving said detent into said groove when said external movable means is in said predetermined position, a source of fluid under pressure, and means coupling said source of fluid under pressure with said fluid operable means through said valve means, said fluid operable means including means moving said detent means into said groove when said valve means is moved from said one position to said another position and actuating means coupled to said valve means and said external movable means for moving said valve means from said one position to said another position when said external movable means is in said predetermined position.

Claim 7

An injection pump assembly comprising, in combination: a stationary housing having a central bore and a source of fluid under pressure connected to said bore; a rotatable drive shaft mounted in said bore; a plurality of reciprocable fluid pumping means; means coupling said rotatable drive shaft and said plurality of reciprocable fluid pumping means for reciprocating said plurality of reciprocable fluid pumping means; said plurality of reciprocable fluid pumping means each having a fluid discharge passage; fluid metering means for metering the amount of fluid pumped by said plurality of reciprocable fluid pumping means; external movable means coupled to said fluid metering means for varying the amount of fluid pumped by said plurality of fluid pumping means; and means coupled to said external movable means and certain of said plurality of fluid pumping means for arresting the reciprocation of said certain of said plurality of fluid pumping means when said external movable means is in a predetermined position whereby pumping of fluid by said certain of said plurality of reciprocable fluid pumping means and discharge of fluid from the associated fluid discharge passage is terminated, each of said certain of said plurality of fluid pumping means having a groove positioned in the outer surface thereof; said means for arresting the reciprocation of said certain of said plurality of fluid pumping means comprising a detent means positioned adjacent each of said certain of said plurality of fluid pumping means and movable into said groove when said external movable means is in said predetermined position, fluid operable means coupled to said detent means for moving said detent into said groove when said external movable means is in said predetermined position, a source of fluid under pressure, and means coupling said source of fluid under pressure with said fluid operable means through said valve means, said fluid operable means including means moving said detent means into said groove when said valve means is moved from said one position to said another position and actuating means coupled to said valve means and said external movable means for moving said valve means from said one position to said another position when said external movable means is in said predetermined position.

Claim 8

A fuel injection pump for an internal combustion engine having A plurality of cylinders comprising: a stationary housing having a central bore and a source of fuel under pressure connected to said bore; a rotatable shaft mounted in said bore; a plurality of fuel pumping plungers mounted in said bore; means coupling said rotatable drive shaft and said plurality of plungers for driving said plungers; said plungers each having a fuel discharge passage communicating with one of the cylinders of the internal combustion engine and a fuel spill line connected to said bore; a fuel metering valve member driven by said drive shaft slidably and rotatably mounted in said bore between said source and said fuel spill lines, said fuel metering valve member having fuel control portions thereon variably controlling the flow of fuel through said spill lines as a function of the axial and rotative movements of said metering member; control means coupled to said fuel metering valve member for moving said fuel metering valve member in an axial direction; and means coupled to said control means and to alternate ones of said fuel pumping plungers for arresting the reciprocable movement of said alternate ones of said plungers when said control means is in a predetermined position in the low speed range of the operation of the internal combustion engine whereby discharge of fuel from each fuel passage connected to said alternate ones of said plungers is terminated; said means coupled to said control means and to alternate ones of said plungers including locking means positioned adjacent said alternate ones of said plungers movable into engagement with each of said alternate ones of said plungers, and actuating means coupled to each of said locking means and to said control means for moving said locking means into engagement with each of said alternate ones of said plungers when said control means is in said predetermined position; said control means comprising a throttle linkage for the internal combustion engine; said actuating means including switch means operable between a closed and an open position, said switch means being positioned adjacent said throttle linkage for movement between one of said positions and the other of said positions when said throttle linkage moves into said predetermined position, and means coupled to said switch means and said locking means and responsive to the movement of said switch means for moving said locking means into engagement with each of said alternate ones of said plungers.

Claim 9

A fuel injection pump for an internal combustion engine having A plurality of cylinders comprising: a stationary housing having a central bore and a source of fuel under pressure connected to said bore; a rotatable shaft mounted in said bore; a plurality of fuel pumping plungers mounted in said bore; means coupling said rotatable drive shaft and said plurality of plungers for driving said plungers; said plungers each having a fuel discharge passage communicating with one of the cylinders of the internal combustion engine and a fuel spill line connected to said bore; a fuel metering valve member driven by said drive shaft slidably and rotatably mounted in said bore between said source and said fuel spill lines, said fuel metering valve member having fuel control portions thereon variably controlling the flow of fuel through said spill lines as a function of the axial and rotative movements of said metering member; control means coupled to said fuel metering valve member for moving said fuel metering valve member in an axial direction; and means coupled to said control means and to alternate ones of said fuel pumping plungers for arresting the reciprocable movement of said alternate ones of said plungers when said control means is in a predetermined position in the low speed range of the operation of the internal combustion engine whereby discharge of fuel from each fuel passage connected to said alternate ones of said plungers is terminated; said means coupled to said control means and to alternate ones of said plungers including locking means positioned adjacent said alternate ones of said plungers movable into engagement with each of said alternate ones of said plungers, and actuating means coupled to each of said locking means and to said control means for moving said locking means into engagement with each of said alternate ones of said plungers when said control means is in said predetermined position; said control means comprising a throttle linkage for the internal combustion engine; said actuating means including switch means operable between a closed and an open position, said switch means being positioned adjacent said throttle linkage for movement between one of said positions and the other of said positions when said throttle linkage moves into said predetermined position, and means coupled to said switch means and said locking means and responsive to the movement of said switch means for moving said locking means into engagement with each of said alternate ones of said plungers.

Claim 10

The combination of claim 6 in which said actuating means further comprises fluid operable means coupled to said locking means, a source of fluid under pressure, valve means operable between a first and second position coupling said fluid operable means with said source of fluid under pressure, said valve means when in said first position applying fluid under pressure to said fluid operable means in a position to hold said locking means out of engagement with said alternate ones of said plungers and when in said second position applying under pressure to said fluid operable means in a position to hold said locking means in engagement with said alternate ones of said plungers, and electrically operable means coupled to said switch means and to each of said valve means for moving said valve means from said first position to said second position when said switch means is moved from said one of said positions to said other of said positions.