Flap hinges system for a flap shaft in a motor vehicle

A flap bearing system for a flap shaft in a motor vehicle the flap bearing system comprising:

• a flap shaft comprising a flap shaft end;
• a flap body arranged on the flap shaft and configured to rotate;
• a first radial bearing with the flap shaft arranged therein;
• a channel housing configured so that a flow cross-section thereof is controllable by rotating the flap shaft with the flap body;
• a first bearing housing configured to radially surround the first radial hearing;
• a bearing housing cover comprising an opening configured to have the flap shaft end protrude there-through, the bearing housing cover being configured to axially close the first bearing housing;
• a sleeve configured to radially surround at least a section of the first bearing housing;
• and
• a circumferential groove formed at an outer circumference at the section of the bearing housing surrounded by the sleeve,
• wherein, the flap shaft end protruding from the first bearing housing is arranged geodetically so as to be at a same height or above an opposite flap shaft end.