The invention relates to a vehicle characterized in that it comprises a tractor having a chassis extending along a longitudinal axis supported by wheels, a cab mounted on a chassis, an air deflecting assembly installed on a roof of the cab, the air deflecting assembly having a shield and an adjustment mechanism configured adjust a rear height of the shield, a semi-trailer configured to be removably attached to the tractor, a mechanical measuring device comprising a first portion configured to be disposed on a semi-trailer roof, second and third portions adjacent to the semi-trailer front wall, the third portion configured to indicate an optimal position of the air deflecting assembly selected from among predetermined positions.

A method for controlling a vehicle includes providing a first vehicle having a deflection system, a control system includes a controller electronically connected to the deflection system, and a first tow connection, the deflection system including a movable deflection member and at least one actuator coupled to the deflection member, providing a second vehicle coupled to the first vehicle, the second vehicle having a second tow connection, providing at least one sensor coupled to the first vehicle and electronically connected to the control system, the at least one sensor configured to capture data corresponding to a frontal area of the second vehicle, monitoring, by the controller, sensor data received from the at least one sensor, and automatically generating, by the controller, a control signal to control the at least one actuator.

A vehicle body side structure is provided. A vehicle body side structure includes a front fender, a side sill garnish, and an aerodynamic duct. The front fender has a fender recess portion below a first wheel arch portion. The side sill garnish has a second wheel arch portion that faces the fender recess portion at the outer side in the vehicle width direction at interval and faces a rear end of the first wheel arch portion. The aerodynamic duct is interposed between the second wheel arch portion and the fender recess portion. The width of the second wheel arch portion gradually decreases in the front-rear direction of the vehicle body as it extends upward from the front end portion of the side sill garnish to an upper edge.

A vehicle body side structure is provided. A vehicle body side structure includes a front fender, a side sill garnish, and an aerodynamic duct. The front fender has a fender recess portion below a first wheel arch portion. The side sill garnish has a second wheel arch portion that faces the fender recess portion at the outer side in the vehicle width direction at interval and faces a rear end of the first wheel arch portion. The aerodynamic duct is interposed between the second wheel arch portion and the fender recess portion. The width of the second wheel arch portion gradually decreases in the front-rear direction of the vehicle body as it extends upward from the front end portion of the side sill garnish to an upper edge.

The disclosure provides a vehicle body lower structure, which can improve aerodynamic performance and improve driving stability. The vehicle body lower structure includes an airflow guiding plate that is arranged on the vehicle body of a vehicle and is movable between a receiving position covering the lower part of the vehicle body and a deploying position protruding downward. The airflow guiding plate includes a first airflow guiding plate and a second airflow guiding plate. The first airflow guiding plate is arranged in front of the left and right front wheels of the vehicle, and the second airflow guiding plate is arranged under the center of the vehicle body. Moreover, the protruding amount of the first airflow guiding plate is different from the protruding amount of the second airflow guiding plate in the deploying position.

A trailer truck is the combination of a truck and one or more trailers used to haul freight. A trailer attaches to the truck via a trailer coupling (hitch), with much of its weight borne by the truck. The result is that both the truck and the trailer will have a distinctly different design than a rigid truck and trailer. Exemplary vehicles are provided, such as heavy duty trucks having truck bodies with improved aerodynamic characteristics, including improved drag coefficients.

A polyolefin resin composition, containing: a polyolefin resin; and cellulose microfibrils, in which a content of the cellulose microfibrils is 0.5 to 20 parts by mass, with respect to 100 parts by mass of an entire resin component in the polyolefin resin composition, a molded article and a back door for a vehicle.

A deployable fairing for a transport vehicle comprises a flexible, internally pressurizable enclosure supported by a structural frame. The structural frame comprises a plurality of rigid structural members forming at least two subframes that are pivotally coupled to one another and is foldably movable between a collapsed configuration and an expanded configuration. The enclosure moves with the structural frame, unfolds when the structural frame moves into the expanded configuration and folds in upon itself when the structural frame moves into the collapsed configuration. Moving the structural frame into the expanded configuration develops tension on at least part of the outer surface of the enclosure, and movement of the structural frame into the collapsed configuration releases the tension. When the enclosure is internally pressurized while the structural frame is in the expanded configuration, the outer surface of the enclosure is structurally stiff and conforms to a predefined aerodynamic shape.

Systems and methods for attaching a reconfigurable roof rack to a vehicle include a rear portion of the reconfigurable roof rack with a multifunctional front surface. The multifunctional front surface has a first function as an airflow guide (e.g., based on non-perpendicular angle the multifunctional front surface forms with the roof) when the reconfigurable roof rack is in a first configuration and a second function as a mounting surface when the reconfigurable roof rack is in a second configuration. The second configuration includes a front portion of the reconfigurable roof rack with a first side and a second side coupled to the multifunctional front surface. The front portion has a slanted front surface which functions as the airflow guide when the reconfigurable roof rack is in the second configuration. The roof of the vehicle can have a removable portion disposed below the front portion of the reconfigurable roof rack.

Systems and methods for attaching a reconfigurable roof rack to a vehicle include a rear portion of the reconfigurable roof rack with a multifunctional front surface. The multifunctional front surface has a first function as an airflow guide (e.g., based on non-perpendicular angle the multifunctional front surface forms with the roof) when the reconfigurable roof rack is in a first configuration and a second function as a mounting surface when the reconfigurable roof rack is in a second configuration. The second configuration includes a front portion of the reconfigurable roof rack with a first side and a second side coupled to the multifunctional front surface. The front portion has a slanted front surface which functions as the airflow guide when the reconfigurable roof rack is in the second configuration. The roof of the vehicle can have a removable portion disposed below the front portion of the reconfigurable roof rack.