Aerodynamic lift and drag reducing device for motor vehicle e.g. minivan, has line, with cylindrical portions, carried by cassette having control assembly controlling displacement of line between retracted and deployed positions

摘要

#CMT# #/CMT# The device has a vortex generator system with a line (10) comprising cylindrical portions (11) arranged upstream and downstream of a turbulent zone of a body (2) of a motor vehicle (1). The zone is created between body units formed of uprights of a rear bay (6), a boot panel (7) and a transversal connection (3) between a roof (4) and a back window (5). The line is carried by an independent cassette integrated in the body units and comprising a control assembly controlling a displacement of the line in a direction normal to the units between retracted and deployed positions. #CMT# : #/CMT# An independent claim is also included for a motor vehicle having an aerodynamic device. #CMT#USE : #/CMT# Used for reducing the aerodynamic lift and drag of a motor vehicle (claimed) e.g. minivan, hatchback and notchback. #CMT#ADVANTAGE : #/CMT# The cylindrical portions have a determined shape which generates a vortex downstream of the portion to reduce the drag and the aerodynamic lift of the motor vehicle in an effective manner. The device thus reduces the consumption of the vehicle and increases the stability of the vehicle even in case of side winds and in case of a non-null incidence with respect to the air flow on the body units of the vehicle. The device has a reduced encumbrance below the body units, increases the aesthetic appearance of the motor vehicle and permits to control swirls, air separations and the entire structure of air flow on the body units in an effective manner. The control assembly controls the displacement of the line between the retracted and deployed positions, so that the assembly is activated rapidly to improve a rear lift of the vehicle and to help the driver of the vehicle to maintain control of the vehicle. The control assembly is sufficiently robust to support aerodynamic forces exerted by the air flow on the cylindrical portions and to permit a reintegration of the portions in the retracted position even when the vehicle moves at a high speed. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a schematic perspective view of the rear of a motor vehicle having an aerodynamic device. 1 : Motor vehicle 2 : Body 3 : Transversal connection 4 : Roof 5 : Back window 6 : Rear bay 7 : Boot panel 10 : Line 11 : Cylindrical portions.