Filler neck assembly and method for producing same
View Patent ↗A filler neck assembly including a main channel for supplying a liquid into a tank and an auxiliary channel for evacuating gas from the tank. The main channel includes a tubular main body including a first end receiving a filler spout and a second end discharging the liquid into the tank. The auxiliary channel includes a first section and a second section, the first section being a channel integrally molded with the tubular main body, and the second section being formed by a feature on an exterior of the main body cooperating with a separately formed part.
1. A filler neck assembly comprising:
a main channel to supply a liquid into a tank and an auxiliary channel to evacuate gas from the tank,
wherein the main channel comprises a tubular main body comprising a first end to receive a filler spout and a second end to discharge the liquid into the tank, and
wherein the auxiliary channel comprises a first section and a second section, the first section being a channel integrally molded with the tubular main body, and the second section being formed by a feature on an exterior of the main body cooperating with a separately formed part.
2. The filler neck assembly according to claim 1 , wherein the separately formed part comprises a tube and the feature comprises an interface to attach the tube.
3. The filler neck assembly according to claim 1 , wherein the separately formed part comprises a cover cooperating with the feature to create an enclosure including openings at its respective extremities, a first one of the openings providing fluid communication between the enclosure and the first section of the auxiliary channel.
4. The filler neck assembly according to claim 3 , wherein a second one of the openings is an opening in the main body near the first end.
5. The filler neck assembly according to claim 4 , wherein the first end includes a flange or a thread, and wherein the second one of the openings is arranged between the flange or thread and a region in which an end of a spout is situated during a filling operation.
6. The filler neck assembly according to claim 3 , wherein the main body and the cover are substantially made of HDPE.
7. A liquid exhaust gas additive supply system comprising:
a tank including a filling orifice; and
a filler neck assembly according to claim 1 mounted onto the filling orifice.
8. A vehicle comprising the liquid exhaust gas additive supply system according to claim 7 .
9. A method for producing a filler neck assembly providing a main channel to supply a liquid into a tank and an auxiliary channel to evacuate gas from the tank, the method comprising:
producing a tubular main body forming the main channel, with an integrally molded first section of the auxiliary channel and a feature on the exterior of the main body;
producing a separate part; and
assembling the separate part with the tubular main body at the feature such that the feature and the separate part cooperate to form a second section of the auxiliary channel.
10. The method according to claim 9 , wherein the separate part comprises a cover, and the main body, the feature, and the cover are shaped so as to create an enclosure including openings at its respective extremities, a first one of the openings providing fluid communication between the enclosure and the first section of the auxiliary channel.
11. The method according to claim 10 , wherein the main body and the cover are produced by injection molding of plastic.
12. The method according to claim 10 , wherein the main body and the cover are substantially made of HDPE.