Measuring and testing – With fluid pressure – Fluid pressure brake system or unit
Patent
1995-07-26
1998-06-16
Dombroske, George M.
Measuring and testing
With fluid pressure
Fluid pressure brake system or unit
73 497, 73168, G01M 302
Patent
active
057673896
ABSTRACT:
A method and apparatus for testing and filling hydraulic assemblies such as a hydraulic clutch control assembly for a motor vehicle. A conduit is placed in communication with a pressure chamber of the assembly; air is sucked out of the pressure chamber through the conduit while a series of pressure readings are taken in the conduit indicative of the gradually declining pressure within the pressure chamber; the pressure readings are utilized to generate a vacuum signature; the vacuum signature is compared to a stored vacuum signature corresponding to an acceptable hydraulic assembly; the hydraulic assembly is accepted or rejected based on the match between the generated vacuum signature and the stored vacuum signature; assuming that the assembly is accepted, liquid is supplied through the conduit to gradually fill the pressure chamber of the assembly while taking a series of pressure readings indicative of the pressure in the chamber during the fill process; the fill pressure readings are utilized to generate a fill signature; the fill signature is compared to a stored fill signature corresponding to an acceptable assembly; and the assembly is rejected or accepted based on the correspondence between the generated fill signature and the stored fill signature.
REFERENCES:
patent: 4959960 (1990-10-01), LaFountain
patent: 4993259 (1991-02-01), LaFountain
Article in "Automotive Engineering", entitled Testing Method Modernized, Jun. 1992, pp. 37-38 by SAE International.
"Signature Analysis" (5 pgs.) advertising brochure.
"Engine Test Systems" single-page advertisement by Proel Systems USA.
Automotive Products (USA) Inc.
Dombroske George M.
McCall Eric S.
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