Fuel injection nozzle valve

Claim 2

An injection nozzle assembly adapted to be connected to a source of fluid under pressure comprising a nozzle body having a discharge orifice opening and a pressure chamber in communication with said orifice opening, conduit means connected to said body for supply of said fluid to the pressure chamber, valve means projecting from the pressure chamber through the orifice opening for blocking discharge of the fluid, means mounted on the valve means and responsive to pressure of said fluid in the pressure chamber for retracting the valve means to unblock the orifice opening, biasing means for opposing said retraction of the valve means, and regulating means extending through the valve means and responsive to discharge of the fluid from the orifice opening for varying the opposition to said retraction of the valve means.

Claim 3

The combination of claim 1 wherein said regulating means includes means mounted within the nozzle body forming a control chamber separated by the pressure responsive means from the pressure chamber, and pressure-sensing means extending from the control chamber through the valve means to monitor said discharge of the fluid.

Claim 4

The combination of claim 2 wherein said biasing means comprises a spring member enclosed within the control chamber in engagement with the pressure-responsive means forwardly urging the valve means to an orifice-blocking position.

Claim 5

The combination of claim 3 including means for securing the chamber forming means to the nozzle body having restricted passages establishing fluid communication between the conduit means and the pressure chamber.

Claim 6

The combination of claim 4 wherein said valve means includes a forwardly converging element slidably connected to the pressure responsive means and having an externally grooved surface portion within the pressure chamber.

Claim 7

The combination of claim 5 wherein said sensing means comprises an inner portion of the forwardly converging element through which a passage extends.

Claim 8

The combination of claim 2 wherein said valve means includes a forwardly converging element slidably connected to the pressure responsive means and having an externally grooved surface portion within the pressure chamber.

Claim 9

The combination of claim 7 wherein said sensing means comprises an inner portion of the forwardly converging element through which a passage extends.

Claim 10

The combination of claim 1 wherein said valve means includes a forwardly converging element slidably connected to the pressure responsive means and having an externally grooved surface portion within the pressure chamber.

Claim 11

The combination of claim 9 wherein said sensing means comprises an inner portion of the forwardly converging element through which a passage extends.

Claim 12

The combination of claim 3 wherein said sensing means comprises a tubular member projecting from the chamber enclosing means through the orifice opening and having a forwardly converging end portion engageable by the valve means.

Claim 13

The combination of claim 11 wherein said valve means comprises a tubular element connected to the pressure responsive means and slidably mounted on the tubular member, said tubular element having flexible portions contracted by the nozzle body into engagement with the end portion of the tubular member in the orifice blocking position of the valve means.

Claim 14

The combination of claim 2 wherein said sensing means comprises a tubular member projecting from the chamber forming means through the orifice opening and having a forwardly converging end portion engageable by the valve means.

Claim 15

The combination of claim 13 wherein said valve means comprises a tubular element connected to the pressure-responsive means and slidably mounted on the tubular member, said tubular element having flexible portions contracted by the nozzle body into engagement with the end portion of the tubular member under the urge of the biasing means to block discharge of fluid from the orifice opening.

Claim 16

The combination of claim 1 wherein said regulating means includes means forming a control chamber within which the pressure-responsive means is received, and pressure-sensing means extending from the control chamber through the orifice opening to monitor said discharge of fluid therefrom.

Claim 17

An injection nozzle assembly adapted to be connected to a source of fluid under pressure comprising a nozzle body having a discharge orifice opening and a pressure chamber in communication with said orifice opening, conduit means connected to said body for supply of said fluid to the pressure chamber, valve means projecting from the pressure chamber through the orifice opening for establishing a spray pattern of the fluid discharged in response to pressurization of the pressure chamber by the fluid, and flow control means extending through the orifice opening for displacing the valve means relative to the orifice opening in response to variations in said supply of the fluid to maintain said spray pattern.

Claim 18

An injection nozzle assembly adapted to be connected to a source of fluid under pressure comprising a nozzle body having a discharge orifice opening and a pressure chamber in communication with said orifice opening, conduit means connected to said body for supply of said fluid to the pressure chamber, valve means projecting from the pressure chamber through the orifice opening for establishing a spray pattern of the fluid discharged in response to pressurization of the pressure chamber by the fluid, and flow control means extending through the orifice opening for displacing the valve means relative to the orifice opening in response to variations in said supply of the fluid to maintain said spray pattern.

Claim 19

The combination of claim 16 wherein said flow control means includes a piston connected to the valve means closing a control chamber within the nozzle body, sensing means extending from the control chamber through the valve means for transmitting a signal pressure to the control chamber lower than the fluid pressure in the pressure chamber during discharge flow from the orifice opening and means for exerting a continuous closing bias on the valve means while subjected to the valve opening urge of pressure in the pressure and control chambers on the piston.

Claim 20

An injection nozzle assembly adapted to be connected to a source of fluid under pressure comprising a nozzle body having a discharge orifice opening and a pressure chamber in communication with said orifice opening, conduit means connected to said body for supply of said fluid to the pressure chamber, valve means projecting from the pressure chamber through the orifice opening for establishing a spray pattern of the fluid discharged in response to pressurization of the pressure chamber by the fluid, pressure responsive means acting on the valve means for displacement thereof relative to the orifice opening in accordance with variations in pressure in the pressure chamber and signal pressure-sensing means connected to the pressure-responsive means and extending through the orifice opening with the valve means for regulating said displacement of the valve means in accordance with variations in the spray pattern.

Claim 21

An injection nozzle assembly adapted to be connected to a source of fluid under pressure comprising a nozzle body having a discharge orifice opening and a pressure chamber in communication with said orifice opening, conduit means connected to said body for supply of said fluid to the pressure chamber, valve means projecting from the pressure chamber through the orifice opening for establishing a spray pattern of the fluid discharged in response to pressurization of the pressure chamber by the fluid, pressure responsive means acting on the valve means for displacement thereof relative to the orifice opening in accordance with variations in pressure in the pressure chamber and signal pressure-sensing means connected to the pressure-responsive means and extending through the orifice opening with the valve means for regulating said displacement of the valve means in accordance with variations in the spray pattern.