Fueling fitting for fueling a motor vehicle with a gaseous fuel

Abstract

The invention relates to a fueling fitting (1) for fueling a motor vehicle with a gaseous fuel. The fitting has a base element (2) in which a receiving chamber (4) is arranged with an input opening (E) for receiving an infrastructure-side fueling device (19). At least one channel-like connection (3a, 3b) is provided for conveying the gaseous fuel from the receiving chamber (4) toward an outlet chamber (7). According to the invention, at least one further channel-like connection (6) joins the receiving chamber (4), said further connection not serving to convey the gaseous fuel from the receiving chamber (4) toward the outlet chamber (7) but instead allowing pressure equalization between the receiving chamber (4) and the surroundings (U). In this way, proper functioning of a fueling processcan be ensured, even if the seals (22a, 22b) of the fueling device (19) are not in perfect condition.

Description

Technical field [0001] The present invention relates to a refueling accessory (Betankungsarmatur, sometimes called a refueling accessory) for refueling a motor vehicle with gaseous fuel according to the features of the preamble of patent claim 1. Background technique [0002] This type of refueling accessory is used to refuel gas-operated vehicles. In particular, motor vehicles running on natural gas are gaining more and more attention because of their relatively low emissions and fuel consumption. [0003] For example, from document EP 0 925 202 B1 and also from document DE 102 53 684 A1, refueling accessories with the features of the preamble of patent claim 1 are already known. In the two specified solutions, the refueling accessory is fixed in the area of ​​the housing of the motor vehicle and can be closed with a fuel tank cap. These solutions should make simple and reliable installation possible and eliminate pollution from refueling accessories. [0004] However, a problem ...

AI Technical Summary

Problems solved by technology

[0004] However, problems can also arise during refueling due to leaks caused by aging or use after the infrastructure-side refueling device has been inserted into the vehicle-side refueling fitting

In particular, a pressure can build up between the infrastructure-side refueling device and the vehicle-side refueling fitting, which leads to detachment of the refueling device from the refueling fitting and thus to an undesired interruption of the refueling process.

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