Installation for supplying gaseous fuels, such as lpg or...

F - Mech Eng,Light,Heat,Weapons – 02 – M

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F02M 21/02 (2006.01) B01F 3/02 (2006.01)

Patent

CA 1073764

ABSTRACT OF THE DISCLOSURE The invention relates to an installation for supplying gaseous fuels such as LPG and natural gas to a combustion engine, said installation being provided with a membrane pro- vided in a housing and being coupled to the valve stem of a gas control valve, the space of said membrane at the one side thereof being connected with a venturi, in which the gaseous fuel is mixed with air drawn into said venturi by the depression created in the engine when running, said connection being such that in said space prevails the depression created during the running of said motor, the other side of the membrane being in connection with the air inlet of the venturi, three springs being provided at said one side of the membrane, said springs being dimensioned and arranged in such a way that the first of said springs is compressed when a small depression, e.g. a pressure of 20 cm water column, occurs at said one side of the membrane, the second spring being compressed as the depression in said space increases, e.g. to a pressure of 15 mm Hg, the third spring being compressed when the engine decelerates, a fourth spring being provided at the other side of the membrane which trys to move the gas control valve in a direction towards its open position.

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