Method of measuring leakage in fuel injector system
This patent describes a method of measuring leakage in the injector and fuel flow system of an internal combustion engine having a fuel return line downstream of the injector system. It comprises establishing by gage measurement the normal operating fuel pressure of liquid flow from a pressurized source to the fuel injector system; adjusting the pressure to less than fuel return line regulator opening pressure; permitting flow to pass therefrom through the fuel return line to stabilize flow from the pressure source until the gage has steady reading; preventing further flow through the fuel return line; shutting off flow between the pressurized source and the gage; and observing any drop in gage pressure after an interval of time to detect leakage.
- Assignee:
- UIS, Inc., New York, NY (United States)
- Patent Number(s):
- A; US 5117683
- Application Number:
- PPN: US 7-668763
- OSTI ID:
- 7049162
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
330100* -- Internal Combustion Engines
330603 -- Vehicle Design Factors-- Engine System
330700 -- Advanced Propulsion Systems-- Emission Control
42 ENGINEERING
420205 -- Engineering-- Transport & Storage Facilities-- (1980-)
CONTROL
DESIGN
ENGINES
FUEL INJECTION SYSTEMS
FUEL SYSTEMS
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
LEAK TESTING
PRESSURE CONTROL
PRESSURE MEASUREMENT
SAFETY ANALYSIS
TESTING