The present invention refers to a servo-assisted system for opening
and closing the side windows of a motor vehicle.
The object of the present invention is to provide a system for opening
and closing the side windows which improves access to a motor vehicle of the type
in which the side doors and the windows therein are mounted so as to open by moving
independently in perpendicular planes.
This object is achieved according to the present invention by a servo-assisted
system having the features claimed in Claim 1.
A further object of the present invention is to provide a secure
locking of the windows to the relevant doors at high speeds for motor vehicles
of the above type.
This further object is achieved, still according to the present invention,
by providing a system having the features specified in Claim 3.
The characteristics and advantages of the invention will become apparent
from the detailed description of one embodiment thereof, with reference to the
appended drawings, provided purely by way of non-limitative example, in which:
- Figure 1 is a partial perspective view of a motor vehicle having the system
of the present invention, with the side doors and windows closed;
- Figure 2 is a partial perspective view of the motor vehicle of Figure 1 with
a side window partially opened;
- Figure 3 is a partial perspective view of the motor vehicle of Figure 1 with
a window and the associated side door partially opened; and
- Figure 4 is a partial transversal vertical section which schematically illustrates
the arrangement of the servo-assisted system of the invention.
With reference to Figures 1, 2 and 3, a motor vehicle generally indicated
1 has side openings 2 in the body which extend towards the centre of the roof so
as to form an upper central portion 3 between them in the shape of a longitudinal
As used here, the terms "longitudinal" and "transverse" are to be
interpreted as referred to the longitudinal centreline of the vehicle, unless indicated
The upper portions of the side windows, which are indicated 4, are
curved and extend to the upper central beam 3, being pivoted thereon at points
schematically indicated 5, so as to open and close by oscillating in a transverse
vertical plane, as indicated by the arrows A in Figure 3.
The side doors of the motor vehicle, indicated 6, are pivoted at
the front to the body at pivot points 7 about respective vertical axes so as to
open and close by turning in a horizontal plane (Figure 3, arrow B)
In the closed configuration illustrated in Figure 1, the windows
4 rest externally on one or more sealing strips, illustrated schematically by a
dotted line and indicated 17, mounted on the upper edges of the doors 6 and on
the border of the openings 2.
With reference to Figure 4, the opening and closing movement of the
windows 4 is controlled by a servo-assisted system comprising a pump 8 which feeds,
through a hydraulic circuit 8a, a pair of hydraulic cylinders 9, one for each window,
operable to control the opening and closing movements of the respective side windows
4. Each cylinder 9 is pivoted on the vehicle body at 10 so that it has limited
freedom to oscillate in a transverse vertical plane, and includes a piston with
a rod 11, the upper end of which is securely pivoted at 12 to the side window
4. The extension and retraction of the piston rod cause the associated window to
open and close respectively.
Still with reference to Figure 4, a microswitch 13 which controls
the operation of the pump 8 is mounted on the door 6 near a handle 14, of conventional
type, which operates the door lock and enables the door to be opened.
The microswitch 13 is operatively connected to the handle 14, whereby
the latter acts on the microswitch 13 during its opening movement, causing the
pump 8 to start, the piston to extend as a result and the oscillating window 4
to open. By acting on the handle, the door 6 and the window 4 can be opened substantially
The microswitch 13 is preferably positioned in such a way that it
is activated by the handle 14 before the latter reaches the angular position in
which it controls the release of the lock. In this way, the window is raised just
before the moment in which the door is opened outwards, thereby avoiding any interference
between the window and the door during the first part of their different opening
The opening and closing movements of the side windows can of course
also be controlled independently of the opening of the doors from inside the vehicle
by means of push-buttons (not shown).
In Figures 3 and 4, an electromagnet, indicated 15, is mounted on
the door 6 at the position of the lower front corner of the window 4 in its closed
position. The window has a ferromagnetic plate 16 at this corner which is attracted
to the electromagnet 15 when this is activated, thereby securely holding the window
4 in its closed position pressing against the door. This device proves useful especially
when the vehicle is travelling at high speed; in fact, over a certain threshold,
the air which flows over the vehicle tends to lift the window from its closed position.
The electromagnet 15 is preferably connected to an on-board electronic
processing unit (not illustrated) operable to activate it automatically when the
vehicle exceeds a certain speed threshold, above which it is necessary to counter
the aerodynamic action tending to lift the window. Alternatively, the electromagnet
15 could be activated in other conditions of use than those described above, but
it should, in any case, be connected to the microswitch 13 and to in-vehicle control
buttons by means of an appropriate circuit 18, in such a way that it is automatically
deactivated when the window is controlled to open or when it is in an open position.