Arrangement for a motor vehicle fuel system

Abstract

Abstract The present invention relates to an arrangement for a motor vehicle fuel system. The arrangement comprises a fuel tank, a filler tube connected to the fuel tank and being sealable by a tank cap and a vent line opening into said fuel tank, the vent line being divided into at least two parts, e.g. a lower and an upper vent line. The vent line is connected to a filter means, which is connected to the intake system of the motor. This filter is capable of accumulating and filtering fuel vapors coming from the fuel tank, so that these vapors will not pollute the atmosphere. Instead, the vapors are sucked into the motor and burned when the motor is operating. The arrangement is chiefly characterized in tat the lower vent line, which is connected to the fuel tank, and one end of the upper vent line open into the filler tube at a place adjacent to the tank cap. Further, the end of the lower vent line opening into the filler tube can be sealed by means of a valve operated by the tank cap, the valve being arranged to close when the tank cap is removed and to open when the tank cap is mounted, and further, the upper vent line between the filler tube and the filter reaches, in a previously known way, substantially up to the highest point of the vehicle and constitutes a liquid trap for a gas-liquid mixture destined for the filter means.

Inventors

• 👤 D Nilson

Bibliographic Details