Motor vehicle fuel tanking system places expansion space within tank below maximum fill level and separated by a wall and linked to tank by pressure-equalizing valve.

摘要

The expansion space (5) lies within the tank (7) and is separated from this (7) by a wall (6) and joined to the tank (7) by a pressure equalizing valve (13) and to atmosphere (17) via an interposed safety valve (16). In this case, space (5) is joined to the tank (7) via closable line (11) passing through the tanking valve (9). In a variant using a combination valve linked to the line (11), the wall between the space and tank (1,5) is in the upper part of the fuel tank and uses gas ports to substitute for the equalizing valve.