Gas turbine engine

Claim 2

A gas turbine engine comprising compressor means, combustion chamber means, turbine means, fuel injection means for introducing fuel to the combustion chamber means, fuel metering means for varying the supply of fuel to said fuel injection means in response to variations in engine operating parameters, fuel supplying means for supplying fuel to said fuel metering means at a constant predetermined pressure, said metering means including metering slots and metering piston means for varying the openings in said slots, said metering means further including movable piston control means connected directly to said metering piston means for controlling the movement of said metering piston means, actuating means for effecting movement of said piston control means in response to variations in the engine operating parameters, and insulating means for operatively insulating said piston control means from the fuel supplying means such that the control of the metering means is independent of the fuel pressure supplied thereto.

Claim 3

A gas turbine engine according to claim 1, further comprising a common housing for both said fuel injection means and said fuel metering means, said fuel injection means and metering piston means and associated slots being in a first section of said housing, said piston control means being in a second section of said housing, and wherein said insulating means includes a partition wall for separating said first and second sections.

Claim 4

A gas turbine engine according to claim 2, characterized in that said first and second sections of the housing are detachably connected to one another.

Claim 5

A gas turbine engine according to claim 2, characterized in that said piston control means comprises electro-magnetic means having a magnet core fixedly mounted in said second section and a magnet coil mounted for movement with respect to said magnet core, said magnet coil being operatively attached for directly moving said metering piston means in response to electrical inputs corresponding to variations in the operating parameters of the engine.

Claim 6

A gas turbine engine according to claim 2, characterized in that said piston control means comprises a control piston movable in response to variations in pressure in said second section.

Claim 7

A gas tUrbine engine according to claim 2, characterized in that said piston control means comprises a control diaphragm movable in response to variations in pressure in said second section.

Claim 8

A gas turbine engine according to claim 5, characterized in that said second section is connected via adjustable throttle means with a compressor outlet and is also connected to a bleed valve means controlled by an engine speed governor.

Claim 9

A gas turbine engine according to claim 6, characterized in that said second section is connected via adjustable throttle means with a compressor outlet and is also connected to a bleed valve means controlled by an engine speed governor.

Claim 10

A gas turbine engine according to claim 2, characterized in that the metering slots are provided in an associated atomizer head which is contained in said first housing section and in that said metering piston means is directly connected with said piston control means.

Claim 11

A gas turbine engine according to claim 9, characterized in that said metering slots are arranged substantially tangentially in said atomizer head and in that said atomizer head is substantially cylindrical.

Claim 12

A gas turbine engine according to claim 9, characterized in that said metering piston means is detachably connected with said piston control means.

Claim 13

A gas turbine engine according to claim 9, characterized in that said metering piston means is non-detachably connected with said piston control means.

Claim 14

A gas turbine engine according to claim 1, characterized in that a means actuated as a function of the engine speed selectively opens or closes a bleed valve operatively connected with the fuel metering means.

Claim 15

A gas turbine engine according to claim 5, characterized in that the control piston is displaceable against the reset effect of a spring.

Claim 16

A gas turbine engine according to claim 5, characterized in that a means actuated as a function of the engine speed selectively opens or closes a bleed valve operatively connected with the second section.

Claim 17

A gas turbine engine according to claim 15, characterized in that the second housing section of the housing is separably connected with the first housing section.

Claim 18

A gas turbine engine according to claim 15, characterized in that the metering slots are provided in an associated atomizer head which is contained in said first housing section.

Claim 19

A gas turbine engine according to claim 15, characterized in that said metering piston means is detachably connected with said control piston.

Claim 20

A gas turbine engine according to claim 15, characterized in that said metering piston means is non-detachably connected with said control piston.

Claim 21

A gas turbine engine according to claim 15, characterized in that said metering slots are arranged substantially tangentially in said atomizer head and in that said atomizer head is substantially cylindrical.

Claim 22

A fuel injection and metering arrangement for use on gas turbine engines of the type having compressor means, combustion chamber means, turbine means and constant pressure fuel supply means for supplying fuel at a constant predetermined pressure; said arrangement comprising fuel injection means for injecting fuel into the combustion chamber, metering means for varying the amount of fuel going to said fuel injection means in response to variations in engine operating parameters, said metering means including metering slots adjacent the injection means and metering piston means for varying the openings in said slots, said metering means further including movable piston control means connected directly to said metering piston means for controlling the movement of said metering piston means, actuating means for effecting movement of said piston control means in response to variations in the engine operating parameters, and insulating means for operatively insulating said piston control means from the fuel supply means such that the control of the metering means is independent of the fuel pressurE supplied thereto.

Claim 23

A fuel injection and metering arrangement for use on gas turbine engines of the type having compressor means, combustion chamber means, turbine means and constant pressure fuel supply means for supplying fuel at a constant predetermined pressure; said arrangement comprising fuel injection means for injecting fuel into the combustion chamber, metering means for varying the amount of fuel going to said fuel injection means in response to variations in engine operating parameters, said metering means including metering slots adjacent the injection means and metering piston means for varying the openings in said slots, said metering means further including movable piston control means connected directly to said metering piston means for controlling the movement of said metering piston means, actuating means for effecting movement of said piston control means in response to variations in the engine operating parameters, and insulating means for operatively insulating said piston control means from the fuel supply means such that the control of the metering means is independent of the fuel pressurE supplied thereto.

Claim 24

An arrangement according to claim 21, further comprising a common housing for both said fuel injection means and said fuel metering means, said fuel injection means and metering piston means and associated slots being in a first section of said housing, said piston control means being in a second section of said housing, and wherein said insulating means includes a partition wall for separating said first and second sections.

Claim 25

An arrangement according to claim 22, characterized in that said piston control means comprises electro-magnetic means having a magnet core fixedly mounted in said second section and a magnet coil mounted for movement with respect to said magnet core, said magnet coil being operatively attached for directly moving said metering piston means in response to electrical inputs corresponding to variations in the operating parameters of the engine.

Claim 26

An arrangement according to claim 22, characterized in that said piston control means comprises a control piston movable in response to variations in pressure in said second section.

Claim 27

An arrangement according to claim 22, characterized in that said piston control means comprises a control diaphragm movable in response to variations in pressure in said second section.

Claim 28

An arrangement according to claim 24, characterized in that said second section is connected via adjustable throttle means with a compressor outlet and is also connected to a bleed valve means controlled by an engine speed governor.

Claim 29

An arrangement according to claim 25, characterized in that said second section is connected via adjustable throttle means with a compressor outlet and is also connected to a bleed valve means controlled by an engine speed governor.