G - Physics – 01 – M
Patent
G - Physics
01
M
73/115
G01M 15/00 (2006.01) F02M 19/01 (2006.01)
Patent
CA 1075493
ABSTRACT OF THE DISCLOSURE The specification discloses a method and apparatus for laboratory testing of carburetors to determine the mass air flow rate and mass fuel flow rate through the carbutetor at any desired test point by providing, in addition to the normally required systems, an improved manifold vacuum control sys- tem for producing a predetermined air flow at a given manifold vacuum, and an improved hood pressure control system which en- ables carburetor testing to take place at test points which cor- respond to different altitudes in which the carburetor may be used. In addition, by providing that these systems be computer controlled, the three-mode controllers normally associated with producing air flow and controlling hood pressure are replaced by a computer which provides output control signals correspond- ing to that which would be provided by three-mode controllers where the values of rate, reset and proportion are continuously and automatically changed to the optimum value for each test point. In this way it is now possible to perform the laboratory carburetor test completely automatically at many test points in the carburetors operating range more quickly, accurately and reliably, whether or not testing is required at sea level or at any altitude within practible limits.
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