Tank ventilation valve for large regeneration air flow volumes has two parallel valves for selective control of flow profile sizes

摘要

The valve (9) has a first connection (10) for an engine intake tube (11), a second connection (15) for an active carbon filter (5), and a connecting valve (16) for a regenerating air fuel vapor mixture (8). A second valve (17) with only one opening and one closed position, is switched parallel to the first one, which has a smaller flow profile (22) than the second valve. The ratio between the flow profiles is between 0,25 and 0,5. The second valve has a flow profile of at lest 10mm. Both valves are solenoid valves.