Vehicle With a Frameless Vehicle Door

A vehicle, comprising:

• a vehicle body having at least one frameless vehicle door with a lower door body and a door window pane;
• a window lifter unit by which the door window pane is able to be moved upward out of the door body and back into the door body,
• wherein the door body is frameless above a door shoulder that upwardly delimits the door body,
• wherein the door shoulder has a passage slot for the door window pane,
• wherein the door window pane is guided, within the door body, by a first guide rail and a second guide rail at a distance from the first guide rail, and
• wherein, when in a state extended out of the door body and with the vehicle door closed, the door window pane bears, at least with a first lateral pane edge, against a first seal on the vehicle body and, with a second lateral pane edge, against a second seal on the vehicle body,
• wherein the door window pane is curved toward a vertical vehicle longitudinal center plane,
• wherein each of the first and second guide rails is curved parallel to an unloaded door window pane, in a region of the latter guided by the guide rail, and about a same axis as the door window pane, and
• wherein a curvature and/or position of the first and second guide rails relative to the door body deviates from a constructional class-A-surface curvature and/or class-A-surface spatial position of the guide rails relative to the door body and are configured or arranged such that:
• (i) when in an unloaded state extended out of the door body, the door window pane forms a first spatial form and/or takes up a first spatial position relative to the door body, which deviates from a constructionally fixed door-window-pane class-A-surface spatial form and/or door-window-pane class-A-surface spatial position relative to the door body, and
• (ii) when in an unloaded state, in which the pane edges bear against respectively associated seals, the door window pane forms a second spatial form and/or takes up a second spatial position relative to the door body, which corresponds substantially to the door-window-pane class-A-surface spatial form and/or door-window-pane class-A-surface spatial position relative to the door body.

A method for constructing a spatial form and movement path of a window lifter unit of a vehicle, the method comprising:

• determining sealing forces required to achieve a predefined sealing action, which sealing forces act locally on a closed door window pane;
• determining a load-free spatial form and/or a load-free spatial position of the door window pane relative to a door body, deviating from a constructional class-A-surface spatial form and/or from a constructional class-A-surface spatial position of the door window pane relative to the door body, from which the door window pane is urged back into the class-A-surface spatial form and/or class-A-surface spatial position by the local sealing forces;
• and
• configuring a curvature of each of a first and second guide rail to be curved parallel to a load-free curvature of the door window pane in a region thereof guided by the guide rail, and about a same axis as the door window pane, such that, when the door window pane is retracted into the door body and when the door window pane is extended out of the door body, the door window pane moves along its own curved area.