Importance

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Abstract

A method of recovering vapor emitted in a liquid dispensing installation comprising: liquid dispensing means (P.sub.L) adapted to cause said liquid to flow with a liquid flowrate Q.sub.L ; vapor recovery means (P.sub.V) adapted to cause said vapor to flow with a vapor flowrate Q.sub.V along a pipe (120), said vapor flowrate Q.sub.V being controlled by a parameter G. According to the invention, the method includes the following steps: establishing an equation G=F (Q.sub.V, {p.sub.i }) relating the parameter G to the vapor flowrate Q.sub.V and to parameters p.sub.i characteristic of the recovery means and said pipe (120); determining an initial value {p.sub.i }.sub.o of the parameters p.sub.i ; on each dispensing k of liquid: measuring the liquid flowrate Q.sub.Lk and determining a value G.sub.k of the parameter G from the equation: G.sub.k =F (Q.sub.Lk, {p.sub.i }.sub.k-1); determining a new value {p.sub.i }.sub.k of the parameters p.sub.i to be used for the next dispensing k+1 of liquid. Application to dispensing fuel for motor vehicles.

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First Claim