Injector

Claim 2

Injector for delivering fuel to at least two fuel inlets of a combustion engine with at least two combustion cylinders, comprising at least two pump chambers, each of said pump chambers communicating via an inlet valve with a fuel supply and via an exhaust valve with a fuel discharge to be connected to a fuel inlet of the combustion engine and each of said pump chambers being adjoined by a displacing member being displaceable to and fro over a pump stroke between two stops, said pump stroke being adjustable by means of control means, each displacing member being displaceable to and fro between two common stops adjustable by means of control means.

Claim 3

Injector according to claim 1, wherein at least two pump chambers are positioned in line between said two common stops.

Claim 4

Injector according to claim 2 wherein the two displacing members of said two pump chambers positioned in line are rigidly connected to each other.

Claim 5

Injector according to claim 1 wherein all displacing members are positioned in one and the same line between said two common stops, said displacing members being in engagement with each other.

Claim 6

Injector according to claim 1 wherein the displacing members are positioned in a plurality of lines parallel to each other between said two common stops, each line being provided with at least the displacing members of two pump chambers.

Claim 7

Injector according to claim 2 wherein all displacing members are positioned in one and the same line between said two common stops, said displacing members being in engagement with each other.

Claim 8

Injector according to claim 3 wherein all displacing members are positioned in one and the same line between said two common stops, said displacing members being in engagement with each other.

Claim 9

Injector according to claim 2 wherein the displacing members are positioned in a plurality of lines parallel to each other between said two common stops, each line being provided with at least the displacing members of two pump chambers.

Claim 10

Injector according to claim 3 wherein the displacing members are positioned in a plurality of lines parallel to each other between said two common stops, each line being provided with at least the displacing members of two pump chambers.

Claim 11

A fuel injection system comprising, in combination: at least two fuel injection nozzles; a fuel pump assembly comprising at least two fuel chambers disposed with their axes in a common plane, means for supplying fuel under low pressure to each chamber and including a check valve associated with each chamber to prevent back flow of fuel, a first fuel outlet conduit connecting one of said nozzles to one of said chambers and a second fuel outlet conduit connecting the other of said nozzles to the other of said chambers and each conduit including a check valve responsive to pressure greater than said low pressure for passing fuel to the associated nozzle, a piston reciprocable in each fuel chamber, and drive means for urging said pistons periodically first in one direction and then in the opposite direction sequentially to receive low pressure fuel and to discharge fuel under high pressure to a respective nozzle; and first stop means for positively limiting the movements of said pistons in one direction and second stop means for positively limiting the movements of said pistons in the other direction, first control means connected with said first stop means for moving said first stop means selectively to allow increased strokes of said pistons under engine starting conditions, and second control means connected with said second stop means for moving said second stop means selectively to increase and decrease the strokes of said pistons under varying conditions of eNgine load.

Claim 12

A fuel injection system comprising, in combination: at least two fuel injection nozzles; a fuel pump assembly comprising at least two fuel chambers disposed with their axes in a common plane, means for supplying fuel under low pressure to each chamber and including a check valve associated with each chamber to prevent back flow of fuel, a first fuel outlet conduit connecting one of said nozzles to one of said chambers and a second fuel outlet conduit connecting the other of said nozzles to the other of said chambers and each conduit including a check valve responsive to pressure greater than said low pressure for passing fuel to the associated nozzle, a piston reciprocable in each fuel chamber, and drive means for urging said pistons periodically first in one direction and then in the opposite direction sequentially to receive low pressure fuel and to discharge fuel under high pressure to a respective nozzle; and first stop means for positively limiting the movements of said pistons in one direction and second stop means for positively limiting the movements of said pistons in the other direction, first control means connected with said first stop means for moving said first stop means selectively to allow increased strokes of said pistons under engine starting conditions, and second control means connected with said second stop means for moving said second stop means selectively to increase and decrease the strokes of said pistons under varying conditions of eNgine load.

Claim 13

A fuel injection system as defined in claim 10 wherein there are four injection nozzles, four fuel chambers all connected to said means for supplying fuel under low pressure and individually connected to said nozzles, four pistons, said fuel chambers having their axes disposed in said common plane, and said first and second stop means each being a unitary device whereby similarly to limit the positions of all of said pistons.

Claim 14

In a fuel injection system, the combination of: a cylinder block assembly having a plurality of fuel chambers therein, a plurality of pistons reciprocable in said chambers and cooperatively arranged in pairs in which as one piston of each pair moves in one direction the other piston of each pair moves in the opposite direction whereby said one piston causes fuel to enter its associated fuel chamber while the other piston causes fuel to be ejected under high pressure from its associated chamber and vice versa for the reversals of said directions of movement, drive means for impositively urging said pairs of pistons back and forth in said directions; and first stop means and second stop means for positively limiting the end points of the strokes of all of said pistons whereby similarly to define the amounts of fuel delivered thereby, and control means for selectively varying the positions of said first and second stop means correspondingly to vary said amounts of fuel delivered.

Claim 15

In a fuel injection system, the combination of: a cylinder block assembly having a plurality of fuel chambers therein, a plurality of pistons reciprocable in said chambers and cooperatively arranged in pairs in which as one piston of each pair moves in one direction the other piston of each pair moves in the opposite direction whereby said one piston causes fuel to enter its associated fuel chamber while the other piston causes fuel to be ejected under high pressure from its associated chamber and vice versa for the reversals of said directions of movement, drive means for impositively urging said pairs of pistons back and forth in said directions; and first stop means and second stop means for positively limiting the end points of the strokes of all of said pistons whereby similarly to define the amounts of fuel delivered thereby, and control means for selectively varying the positions of said first and second stop means correspondingly to vary said amounts of fuel delivered.

Claim 16

In a fuel injection system as defined in claim 12 wherein there are four pistons arranged in two pairs thereof.

Claim 17

In a fuel injection system as defined in claim 13 wherein said first stop means is controlled manually for fuel enrichment during starting and said second stop means is controlled to increase and decrease said amounts of fuel delivered in dependence upon variations in engine load.

Claim 18

In a fuel injection system as defined in claim 12 wherein said first stop means is controlled manually for fuel enrichment during starting and said second stop means is controlled to increase and decrease said amounts of fuel delivered in dependence upon engine load.