Air guiding device for a motor-vehicle

An air guiding device for a motor-vehicle, comprising:

• a main chamber located at a rear of a front wall of a motor-vehicle, said main chamber defined between said front wall, a rear wall spaced apart from said front wall, an upper wall, a lower wall and two side walls,
• at least one first opening on said front wall to allow air to flow into said chamber,
• at least one second opening on said rear wall, for guiding air to an engine compartment of the motor-vehicle,
• two side ducts, each extending from an inlet located at a respective side wall of the main chamber to an outlet giving out on a respective outer side wall of the motor vehicle,
• a flow control device for controlling an airflow through said second opening, and
• the outlets of the two side ducts arranged and oriented so as to generate a substantially flattened and vertical air curtain adjacent to each front wheel of the motor-vehicle, on the outer side thereof;
• wherein the device for controlling the airflow through the second opening is a device with orientable louvers which is controlled by an electronic control unit on the basis of one or more parameters, the parameters comprising a value of a temperature of the engine cooling fluid, an air temperature at the motor-vehicle intercooler, a pressure within the condenser of the air conditioning system or the vehicle speed,
• wherein the device with orientable louvers comprises two arrays of louvers with vertical oscillation axes contained in a plane parallel to said rear wall and said orientable louvers form two groups which are symmetrically movable with respect to a median plane of the motor-vehicle, so that in the partially opened condition of the device with orientable louvers, these louvers tend to direct the airflow entering into the engine compartment towards the sides of the engine compartment.

A motor vehicle front end system for reducing an aerodynamic drag, the system comprising:

• a main chamber located at a rear of a front wall of a motor-vehicle, said main chamber defined between said front wall, a rear wall spaced apart from said front wall, an upper wall, a lower wall and two side walls,
• at least one first opening on said front wall to allow air to flow into said chamber,
• at least one second opening on said rear wall, for guiding air to an engine compartment of the motor-vehicle,
• two side ducts, each extending from an inlet located at a respective side wall of the main chamber to an outlet giving out on a respective outer side wall of the motor vehicle,
• a flow control device for controlling an airflow through said second opening,
• wheel compartments defined by a body and receiving wheels of the vehicle, and
• the outlets of the two side ducts arranged and oriented so as to generate a substantially flattened and vertical air curtain in a form of a planar air blade, parallel to a vertical longitudinal plane of the motor-vehicle and located adjacent to each front wheel of the motor-vehicle, on the outer side thereof, in such a way as to provide a reduction and/or a complete elimination of air vortices within the wheel compartments.