Crankcase ventilation for an internal combustion engine, tank ventilation conduit and connection system therefor

A tank ventilation conduit for a motor vehicle, the tank ventilation conduit connecting a fuel tank to an activated-carbon container or an intake duct of the internal combustion engine or connecting an activated-carbon container to an intake duct of the internal combustion engine, the tank ventilation conduit comprising:

• a first pipe connector (10), and
• a second pipe connector (20) with a receiving chamber (24) into which the first pipe connector (10) is insertable,
• wherein a second groove (22) is formed in the receiving chamber (24), and
• the first pipe connector (10) has a first groove (12), wherein
• a compressible retaining ring (40) is inserted into the first groove (12),
• the compressable retaining ring being engageable with the second groove (22) when the first pipe connector (10) is inserted into the receiving chamber (24), or
• an expandable retaining ring is inserted into the second groove (22),
• the expandable retaining ring being engageable with the first groove (12) when the first pipe connector (10) is inserted into the receiving chamber (24).

A connection system for a fluid conduit containing fuel vapor or a combustion gas in a motor vehicle, in particular for a ventilation conduit for a crankcase ventilation of an internal combustion engine, a tank ventilation conduit, or a propulsion jet pump for generating negative pressure in a motor vehicle, comprising:

• a first pipe connector (10), and
• a second pipe connector (20) with a receiving chamber (24) into which the first pipe connector (10) is insertable,
• wherein a second groove (22) is formed in the receiving chamber (24), and
• the first pipe connector (10) has a first groove (12), wherein
• a compressible retaining ring (40) is inserted into the first groove (12),
• the compressible retaining ring being engageable with the second groove (22) when the first pipe connector (10) is inserted into the receiving chamber (24), or
• an expandable retaining ring is inserted into the second groove (22),
• the expandable retaining ring being engageable with the first groove (12) when the first pipe connector (10) is inserted into the receiving chamber (24).