Truck and method for controlling such a truck
A truck has a cabin, the cabin having a roof and an aerodynamic roof deflector panel mounted on the roof and covering at least partly the roof, thereby delimiting a space extending between the roof and the panel. The panel includes at least a member movable between a first position and a second position. In the second position of the movable member, an air passage is created in front of the space. In the first position, the air passage is closed or substantially closed.
1. A truck comprising
a cabin, the cabin having
a roof and
an aerodynamic roof deflector panel mounted on the roof and covering at least partly the roof thereby delimiting a space extending between the roof and the panel, wherein the panel comprises at least a member movable between a first position and a second position, wherein in the second position, an air passage is created in front of the space, whereas in the first position, the air passage is closed or substantially closed,
means to move the movable member with respect to the roof based on parameters representing a temperature measured in at least one of the cabin, the space extending between the panel and the roof, and the ambient air,
articulatable arms for mounting the panel, and
at least one actuator adapted to simultaneously elevate the panel relative to the roof of the cabin and move the panel forward relative to the roof of the cabin.
2. The truck according to claim 1 , wherein, in the first position of the movable member, a front edge of the movable member, extending in a substantially horizontal direction, is close to or in contact with the roof, and in the second position, the front edge is remote from the roof, at a distance of the roof larger than 30 mm, preferably larger than 60 mm.
3. The truck according to claim 1 , wherein, in the second position of the movable member at least one side edge of the member is remote from a lateral surface of the cabin.
4. The truck according to claim 2 , wherein the distance between the from edge of the movable member and the roof is adjustable.
5. The truck according to claim 1 , comprising fans to initiate convection heat exchanges between air and the roof of the cabin in the space extending between the roof and the panel.
6. The truck according to claim 1 , comprising means to seal a junction zone between the member and the roof of the cabin.
7. The truck according to claim 6 , wherein the means to seal the junction comprises a sealing gasket and/or compressible foam adapted to lay in a sealed manner between, on the one hand, the front edge and/or a side edge of the member and, on the other hand, the roof of the cabin.
8. The truck according to claim 1 , wherein the movable member can be moved into an intermediate position, in which the distance between the front edge of the movable member and the roof is lower than in the second position.
9. The truck according to claim 1 , wherein the movable member is the totality of the panel.
10. The truck according to claim 9 , comprising sliders and at least one actuator adapted to move the panel in translation (A 3 ) along the sliders from its first position to its second position.
11. The truck according, to claim 1 , wherein the or each movable member is a flap consisting in or comprising a portion of the panel.
12. The truck according to claim 11 , comprising several flaps mounted in the vicinity of the front side of the cabin and in the vicinity of lateral surfaces of the cabin.
13. The method for controlling a truck having a cabin, the cabin having a roof and an aerodynamic roof deflector panel mounted on the roof via articulatable arms and substantially parallel to the roof, comprising
moving at least a portion of the panel from a first position to a second position, wherein in the second position, an air passage is created in front of a space extending between the roof and the panel whereas, in the first position, the air passage is closed or substantially closed, wherein the step of moving the portion of the panel from its first position to its second position is performed when a temperature, measured in at least one of the cabin, the space extending between the panel and the roof, and the ambient air, reaches a threshold value, and
simultaneously elevating the panel relative to the roof of the cabin via an actuator and moving the panel forward relative to the roof of the cabin when moving the panel from the first position to the second position.
14. The method according to claim 13 , wherein the step of moving the portion of the panel from its first position to its second position is implemented when an internal combustion engine of the truck is shut down and/or when a park brake is activated.