Apparatus and method for evaluating fuel injectors
First Claim
Patent Images
1. An apparatus comprising:
- a fuel injector operably connected to a fluid supply system and having a nozzle with a fluid cavity;
at least one discharge port disposed in the nozzle;
an orifice disposed in the nozzle; and
a pressure sensor adjacent to the orifice, wherein fluid in the fluid cavity is in fluid communication with the pressure sensor, such that the pressure sensor measures fluid pressure.
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Abstract
An apparatus and method for measuring the pressure of a fluid near discharge ports 409 in a nozzle 213 of a fuel injector 201 are described. A fuel injector 201 is charged with fluid from a fluid tank 203 by a fuel pump 205. Upon activation of the fuel injector 201, the fluid is discharged from the nozzle 213. Fluid pressure in the nozzle 213 is communicated to a pressure sensor 215 through an orifice 411 in the nozzle 213. The pressure sensor 215 measures fluid pressure near the discharge ports 409 during fuel injector 201 operation.
52 Citations
20 Claims
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1. An apparatus comprising:
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a fuel injector operably connected to a fluid supply system and having a nozzle with a fluid cavity;
at least one discharge port disposed in the nozzle;
an orifice disposed in the nozzle; and
a pressure sensor adjacent to the orifice, wherein fluid in the fluid cavity is in fluid communication with the pressure sensor, such that the pressure sensor measures fluid pressure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A fuel injector comprising:
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a nozzle having at least one discharge port;
a needle slideably mounted inside the fuel injector and the nozzle;
a fluid cavity disposed in the nozzle; and
a pressure sensor arranged to measure pressure in the fluid cavity. - View Dependent Claims (11, 12, 13)
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14. A method comprising the steps of:
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charging a fuel injector with fluid;
discharging the fluid from at least one discharge port in a nozzle of the fuel injector;
communicating fluid to a pressure sensor through a first orifice disposed in the nozzle; and
measuring fluid pressure near the at least one discharge port with the pressure sensor. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification