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US 10,590,899 B2Granted
Fuel injectors with improved coefficient of fuel discharge
Assignee3M Innovative Properties Company
InventorsScott M. Schnobrich, Barry S. Carpenter, Barbara A. Fipp, James C. Novack, David H. Redinger, Ryan C. Shirk
Life of this patent
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Abstract
Nozzles and method of making the same are disclosed. The disclosed nozzles have at least one nozzle through-hole therein, wherein the at least one nozzle through-hole exhibits a coefficient of discharge, CD, of greater than about 0.50. Fuel injectors containing the nozzle are also disclosed. Methods of making and using nozzles and fuel injectors are further disclosed.
Claims21
A fuel injector nozzle comprising:
- an inlet face;
- an outlet face opposite said inlet face;
- and a plurality of nozzle through-holes, with each of said nozzle through-holes comprising at least one inlet opening on said inlet face connected to at least one outlet opening on said outlet face by a cavity defined by an interior surface, each said at least one inlet opening having an inlet opening dimension, D, each said at least one outlet opening having an outlet opening dimension, d, and at least one of said nozzle through-holes exhibiting a coefficient of discharge, Cd, of greater than about 0.50 as calculated by the formula:
- C
- D
- =
- Q
- Outlet
- A
- Outlet
-
- 2
- *
- (
- P
- 1
- -
- P
- 2
- )
- ρ
-
- [
- 1
- -
- [
- A
- Outlet
- A
- Inlet
- ]
- 2
- ]
- ,
- wherein:
- Qoutlet represents a volumetric flow rate of a fluid exiting said at least one outlet opening;
- Aoutlet represents an outlet area of said at least one outlet opening;
- Ainlet represents an inlet area of said at least one inlet opening;
- P1 represents a first pressure along said at least one inlet opening;
- P2 represents a second pressure along said at least one outlet opening;
- and
- ρ represents a density of a fluid exiting said at least one outlet opening, wherein Aoutlet is smaller than Ainlet.
39 more elements
Dependencies are inferred from the claim text.