Flow meter and method of using the same

Details Flow meter and method of using the same Flow meter and method of using the same

2007-11-27

2007-11-27

Patel, Harshad (Department: 2855)

Measuring and testing

Volume or rate of flow

Using differential pressure

C073S114220

Reexamination Certificate

active

11347913

ABSTRACT:
The invention relates to a new method and a new apparatus to accurately measure flow rates in injection systems such as gasoline, direct injection gasoline and diesel downstream of the injector where the fuel (liquid in general) is discharged from a nozzle (e.g. an injector). More specifically, it measures the flow velocities and volumetric flow rates in highly transient flows discharged cyclically with injection duration within a few hundred microseconds. Moreover, it is able to resolve multiple injection shots produced within an engine cycle with high volumetric (0.01 mm3) and temporal (10 μs) sensitivities. The main uses of this instrument in automotive industry are manufactures of FIE, injection test machines and injection diagnostic systems. In other industries the uses maybe represented by measuring and controlling of highly transient flows with a need to accurately perform quantitative flow data in wide range of timing and dosing.

REFERENCES:
patent: 5186008 (1993-02-01), Appolonia et al.
patent: 5663509 (1997-09-01), Lew et al.
patent: 5700958 (1997-12-01), Lew et al.
patent: 2006/0173607 (2006-08-01), Matsuo
Hill, Geoffrey W., “Evaluation and Inversion of the Ratios of Modified Bessel Functions, I1(x)/I0(x) and I1.5(x)/I0.5(x)”, ACM Transactions on Mathematical Software, vol. 7, No. 2, Jun. 1981, pp. 199-208.
Ismailov, Murad M., “Dynamic Sonar Instantaneous Flow Meter (DISF) for Quantification of Diesel Multi-Burst Injection with High Temporal and Volumetric Resolution”, SAE International, Paper No. 06P-510, 2005.

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