Method and system for detecting significant hydraulic leaks

Details Method and system for detecting significant hydraulic leaks Method and system for detecting significant hydraulic leaks

1992-09-21

1996-03-12

Chilcot, Richard

Measuring and testing

With fluid pressure

Leakage

G01M 328, G01F 1104

Patent

active

054976537

ABSTRACT:
A method of detecting hydraulic leaks from a high pressure fuel hydraulic system is useful in systems where a pump, actuators, and hydraulic lines are filled with engine fuel at high pressure. The method comprises the steps of calculating pump flow based on a core engine RPM and a pump displacement, and calculating actuator fluid flow. System condition signals are then generated to indicate whether the core engine RPM is constant and whether the actuators are quiescent. A servo flow value is then provided, typically at predetermined system conditions, as indicated by the system condition signals, using the pump flow calculation and the actuator fluid flow calculation. Finally, leak flow is determined based on the pump flow calculation, the actuator fluid flow calculation, and the servo flow value, and the leak flow is responded to accordingly.

REFERENCES:
patent: 4152925 (1979-05-01), Lindh

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