Abstract:
A motor vehicle roof with a transparent roof section and at least one ventilator which borders the roof section for clearance of a ventilator opening, a front and/or rear transverse body member of the vehicle roof which borders the transparent roof section containing the at least one ventilator . The transparent roof section is a cover which is attached to the transverse roof members and is preferably a glass cover.

Description:
BACKGROUND OF THE INVENTION  
         [0001]    1. Field of the Invention  
           [0002]    The invention relates to a motor vehicle roof with a transparent roof section and at least one ventilator means which borders the roof section for clearance of a ventilator opening.  
           [0003]    2. Description of Related Art  
           [0004]    Published European Patent Application EP 0 362 028 B1 discloses a motor vehicle roof with a roof cutout into which a frame is inserted on which the front ventilator flap and the rear ventilator flap are pivotally mounted. Between the two ventilator flaps, a cover, for example, a glass cover, is movably mounted to pivot on the frame. In addition, another rear fixed or removable cover is attachable to the frame between the front cover and the rear ventilator flap. The front and the rear ventilator flaps are coupled to one another by an actuating means with an electric motor and with two sheathed cables. The two sheathed cables each drive one of two movable actuating carriages which are located on each side of each ventilator flap and control the raising motion of the ventilator flaps which are pre-tensioned by springs in the raising direction via crank guides. When the cables are displaced from the closed position in one direction in a sequence of motions, the rear ventilator flap is opened. Then, the front ventilator flap is opened with simultaneous closing of the rear ventilator flap, and finally again, the front ventilator flap is opened jointly with the still open rear ventilator flap. When the cables are moved from the closed position in the opposite direction, the actuation carriages break contact with the crank guides so that they are righted by spring force. Then, the actuation carriages of the front ventilator flap engage the crank guides of the front raisable cover and raise it.  
         SUMMARY OF THE INVENTION  
         [0005]    The primary object of the present invention is to provide a motor vehicle roof which permits a comfortable, bright motor vehicle interior with largely reduced draft and noise behavior.  
           [0006]    This object is achieved by providing a motor vehicle roof where the ventilator means is contained in a front and/or rear transverse roof member which borders the transparent roof section. With the transverse roof member as the supporting part of the roof, and as a result of the dimensioning of the transverse roof member, the ventilator means and actuation means are interchangable. The bordering transparent roof section is directly connected to the transverse roof member, for example, by cementing, so that the transparent roof section, which is preferably a glass cover, may be installed on the motor vehicle roof without a frame. The glass cover may take up almost all of the motor vehicle roof, and, as a result of the large glass surface, the impression of an open roof can be obtained, yet, draft and air stream noise, which commonly occurs when the sliding roof cover is opened, is eliminated. High ventilation performance results from using only a front or a rear ventilator means. If two ventilator means are used, a ventilation behavior which corresponds to the respective requirements may be individually adjusted for the front seats and the back seats by selectively opening one or both ventilator means.  
           [0007]    The ventilator means may contain a raisable ventilator flap which may be swivelled out, for example, around a swiveling axis which is located in the area of the front edge of the ventilator means. The rising rear edge of the ventilator flap then opens the ventilation opening.  
           [0008]    For air guidance, it is desirable for the transverse roof member to contain air flow openings which may be covered by the ventilator flap.  
           [0009]    For an optically pleasing appearance of the motor vehicle interior, it is advantageous for the transverse roof member to have a lower cover which is then able to be used to establish an air flow path for ventilation of the motor vehicle interior via the ventilator means. It is also advantageous for the covering to have openings or a perforation so that the inside air may flow out over a large area.  
           [0010]    Preferably, in the front and/or the rear transverse roof member, there is provided a telescoping headliner for at least partial bottom coverage of the transparent roof section.  
           [0011]    For individual adjustment, the front and the rear ventilator means may be actuated independently of one another by a drive means for each ventilator means. 
       
    
    
     BRIEF DESCRIPTION OF THE DRAWING  
       [0012]    [0012]FIG. 1 shows a lengthwise section of the motor vehicle roof with the ventilator flaps closed;  
         [0013]    [0013]FIG. 1 a  is an enlarged view of the front section of the motor vehicle roof as shown in FIG. 1;  
         [0014]    [0014]FIG. 1 b  is an enlarged view of the section of the motor vehicle roof as shown in FIG. 1;  
         [0015]    [0015]FIG. 2 shows a lengthwise section of the motor vehicle roof of FIG. 1 with the ventilator flaps opened and the headliner closed;  
         [0016]    [0016]FIG. 2 a  is an enlarged view of the front section of the motor vehicle roof as shown in FIG. 2; and  
         [0017]    [0017]FIG. 2 b  is an enlarged view of the rear section of the motor vehicle roof as shown in FIG. 2. 
     
    
     DETAILED DESCRIPTION OF THE INVENTION  
       [0018]    The motor vehicle roof  1  of a passenger vehicle contains a front transverse roof member  2  and a rear transverse roof member  3  which extend as reinforcing or bearing parts for support of the motor vehicle roof. Between the two transverse roof members  2 ,  3  extends a glass cover  4  as a fixed transparent roof section of the motor vehicle roof  1 . The glass cover  4  is mounted on its front edge to the edge  5  of the transverse roof member  2 , for example, by cementing.  
         [0019]    The front transverse roof member  2  contains a ventilator means  6  with a ventilator louver or ventilator flap  7  which is pivotally mounted on the transverse roof member  2  around a pivot axis  8  in the area of the front edge of the ventilator flap  7 . By means of an individually actuatable drive means  9  which is attached to the front transverse roof member  2 , the ventilator flap  7  may be raised fully or partially into the ventilator positions to form a ventilator opening  11  between the raised rear edge  10  and the front edge of the glass cover  4 . The transverse roof member  2  contains over the width of the roof several air flow openings  12  (only one of which can be seen) by which the air from the motor vehicle interior  13  may flow out into the hollow transverse roof member  2 , through the air flow openings  21 , and then, via the ventilator opening  11 , to the top of the roof. The air flow openings  21  may be closed and sealed tight by the ventilator flap  7 .  
         [0020]    Under the transverse roof member  2  towards the motor vehicle interior  13 , a cover  14  is attached which may be made as part of the roof headlining. The cover  14  leaves open flow paths  15  for ventilation of the motor vehicle interior  13 . The flow paths  15  are formed, for example, between the cover  14  and the transverse roof member  2 . A flow path may also be formed by openings or a perforation in the cover  14 .  
         [0021]    The glass cover  4  is attached on its rear edge  16  to the edge  17  of the rear transverse roof member  3 , for example, by cementing. The rear transverse roof member  3  similarly contains a ventilator means  6 ′ with a ventilator louver or ventilator flap  7 ″ which is pivotally mounted in the area of the front edge of the ventilator means  6 ′ to pivot around the pivot axis  8 ′. By means of an individually actuatable drive means (similar to  9 , not shown) which is attached to the rear transverse roof member  3 , the ventilator flap  7 ′ may be raised partially or completely into ventilator positions in which a ventilator opening  11 ′ is formed between the raised rear edge  10 ′ and the transverse roof member  3 . The transverse roof member  3  similarly contains over the width of the roof several air flow openings  12 ′ (only one of which is shown) by which air from the motor vehicle interior  13  may flow out into the hollow transverse roof member  3 , on through the air flow openings  21 ′, and, via the ventilator opening  11 ′, to the top of the roof. The air flow openings  21 ′ may be closed and sealed tight by the ventilator flap  7 ′.  
         [0022]    The cover  14 ′ is similarly attached under the rear transverse roof member  3 , for example, by cementing. The flow paths  15 ′ are formed, for example, between the cover  14 ′ and the transverse roof member  3 . The cover  14 ′ may have openings or a perforation. In the receiving space  18  between the glass cover  4  and the cover  14 ′, there is a retractable headliner  19  which may be telescopically deployed from its storage position (FIG. 1) as far as the front transverse member  2 , and thus, may completely cover the glass cover  4  on the bottom. The headliner  19  may be made as a shade or from individual louvers  20  which are layered on top of one another in the storage position and may be extended forward via lateral guides to the front transverse roof member  2 .  
         [0023]    The covers  14 ,  14 ′ cover the two transverse roof members  2  and  3  and the stored headliner  19  with respect to the motor vehicle interior  13  and ensure draft-free ventilation by the configuration of the flow paths  15  and  15 ′.