Gas and liquid contact apparatus – Fluid distribution – Valved
Patent
1996-07-02
1997-10-07
Miles, Tim R.
Gas and liquid contact apparatus
Fluid distribution
Valved
261DIG59, F02M 910
Patent
active
056744340
DESCRIPTION:
BRIEF SUMMARY
This application is a 371 of PCT/PT95/00002.
TECHNICAL DOMAIN
This invention concerns complementary arrangements to regulate the dosage of fuel, applied to engine feeding systems by suction of the fuel, in order to obtain a air/fuel ratio of the mixture which will fulfill the conditions for a correct performance of the engines in the whole range of regimes of rotation.
If we regulate a carburettor of a simple construction to the correct relation of mixture for a maximum number of rotations, this mixture will be too poor in what the low regimes are concerned. On the contrary, if we choose a relation of mixture suitable for low regimes, this mixture will be too rich for the maximum number of rotations.
PREVIOUS TECHNIQUE
To minimize these inconvenients, arrangements of complementary regulation included in the carburettors have been idealized and these could shortly and in a generic way be specified in the following types according to the description of Dante Giacosa in his book "Endothermic Engines", Ed. Omega, Barcelona, 14th edition, pages 370/3: gauge, regulated to the suitable dosage in a maximum of rotations, is corrected through a secondary or compensator gauge which enriches the mixture in low regimes. low regimes is impoverished to the high regimes through the aspiration of suplementary air, by means of conduits placed under the diffuser. regulated to low regimes is impoverished in the high regimes by means of air that, required by the same depression, acts antagonistically to the fuel. subdivided by two conduits of aspiration, acting, one of them, to the low regimes of rotation and the two of them together to the high regimes.
However the referred arrangements of complementary regulation depend on the actions of movement which use routes of fuel and air in suplementary conduits--mechanical elements, as springs and small levers. These actions involve an appreciable inertia which prevents or delays the timely and strict adjustment in order to obtain a well balanced dosage in all the extent of rotation regimes.
Adding to these difficulties, such complementary arrangements are performed integrating them in the carburettors which increases the complexity of its construction.
EXPLANATION OF THE INVENTION
The aim of the invention is to solve these problems by means of a device which regulates the vacuum and which acts directly and immediately in the main current of air. The active laminar elements which constitute the essential point of the device have a very weak inertia and this characteristic allows them to react in an almost instantaneous way to the changes of the regime of rotation by flexing variably according to the changes of speed in the main current of air.
From the variation of the amplitude of the bending of the laminar elements results the formation between them of an in-between space aimed at the passage of the current of air, whose area is of variable size according to the variation of speed of the current of air and according to the resistence to the flexure selected for the laminar elements.
An important advantage of the invention stays in the possibility of mutual adjustment of the mentioned variables in such a way that, from it, it results, in the space of the conduit that surrounds the diffuser of fuel, the regulation of a certain value of vacuum which, in association with a proper value of the gauge which gives fuel to the diffuser allows to obtain a correct dosage in the whole range of rotation with special incidence to the high regimes.
Another important advantage is the fact that each device and each carburettor constitute independent units simplifying its modulation and allowing a functional construction of accurate exactitude.
One of the ways by which the invention can be build up is found next, in detail, with a reference to the drawings which only represent one way of making it.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 displays a view of the device whose laminar elements (1) are keeping a flat form because they have not been pushed yet by the current of air to some a
REFERENCES:
patent: 1413371 (1922-04-01), Adler et al.
patent: 1433545 (1922-10-01), Gilles
patent: 1620746 (1927-03-01), Weaver
patent: 4123233 (1978-10-01), Mannino
Baptista Fernando A.
Pereira-Dias Baptista Joao M.
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