Abstract: In a control process and control device for motor vehicles with an unfoldable roof, in which at least one roof part or a lid is moved in at least one movement phase defined by a displacement path for the roof part or the lid, the displacement path is bounded by two end positions. By way of an electronic control device, the displacement device for the movement of the roof part or of the lid is actuated such that the speed at which the roof part or the lid is moved is smaller for a first path segment beginning the displacement path and for a second path segment ending the displacement path than the speed for the path segment between the first path segment and the second path segment.

Abstract: In a control process and control device for motor vehicles with an unfoldable roof, in which at least one roof part or a lid is moved in at least one movement phase defined by a displacement path for the roof part or the lid, the displacement path is bounded by two end positions. By way of an electronic control device, the displacement device for the movement of the roof part or of the lid is actuated such that the speed at which the roof part or the lid is moved is smaller for a first path segment beginning the displacement path and for a second path segment ending the displacement path than the speed for the path segment between the first path segment and the second path segment.

Abstract: A system for opening and closing a folding top or moveable vehicle roof of a convertible car is provided, with at least one drive to operate the top or roof, at least one linear position sensor that senses continuously the position of an element of the top or roof and, a controller that receives a signal from the at least one position sensor and generates, a signal to actuate at least one drive. The linear sensor is arranged to determine the position of any element of the folding top or moveable vehicle roof relative to another moveable element of the top or roof or to a fixed element relative to the vehicle.

Abstract: A system for opening and closing a folding top or moveable vehicle roof of a convertible car, with at least one drive means to open and close the folding top or moveable vehicle roof, at least one linear position sensor that senses continuously the position of an element of the folding top or moveable vehicle roof at least over a subrange of its path of movement and, a controller that receives a signal from the at least one position sensor and generates, in consideration of at least one position sensor signal, a signal to actuate at least one drive means, where the linear sensor is arranged in a manner to determine the position of any element of the folding top or moveable vehicle roof relative to another moveable element of the folding top or moveable vehicle roof or to a fixed element relative to the vehicle.

Abstract: In a method for regulating the headlight range of a vehicle as a function of the load, the vehicle speed is also taken into account to increase or decrease the headlight range at high or low speed. With the vehicle at rest, the headlight range can be further reduced by contrast with a vehicle operating at a lower speed. The same applies to driving on a highway with a rough surface.

Abstract: In a device for adjusting the tilt of a motor vehicle headlight, using a stepping motor that adjusts the inclination of the headlight as a drive motor which is controlled in accordance with a tilt set value, the stepping frequency of the stepping motor, depending on the headlight operating temperature, is smaller for low temperatures than for higher temperatures.