| 摘要 |
<p>The tank (102) has a vent line (110) from a fresh air filter (112) to a hydrocarbon filter element (108) e.g. activated charcoal filter. A diagnostic valve (120) permanently arranged between the fresh air filter and the hydrocarbon filter element comprises an operating port, where the diagnostic valve forms a passage for operating gases during operation. The diagnostic valve includes a diagnostic port, where the valve is connected to an external pressure-generating device in a diagnostic position, and forms a diagnostic passage to the hydrocarbon filter element in the diagnostic position.</p> |
