# US 2017/0282980 A1 · Motor Vehicle Having a Front Apron Having Duct-Like Air-Guiding Devices > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0282980 A1 - Document ID: US20170282980A1 - Status: Published application - Kind: A1 - Application number: 15/581,792 - Filed: 2017-04-28 - Published: 2017-10-05 - Earliest claimed: 2014-10-31 - Assignees: Bayerische Motoren Werke Aktiengesellschaft - Applicants: Bayerische Motoren Werke Aktiengesellschaft - Inventors: Christian SEITZ - Web page: https://patentgrep.com/patent/US20170282980A1 ## CPC - B62D 35/005: {Front spoilers (B62D35/001 takes precedence)} - B62D 35/02: Streamlining the undersurfaces {(B62D35/005, B62D35/007, B62D35/008 take precedence)} - Y02T 10/82: Elements for improving aerodynamics - Y02T 10/88: Optimized components or subsystems, e.g. lighting, actively controlled glasses - B62D: MOTOR VEHICLES; TRAILERS (steering, or guiding on a desired track, of agricultural machines or implements A01B69/00; wheels, castors, axles, increasing wheel adhesion B60B; vehicle tyres, tyre inflation or tyre changing B60C; connections between vehicles of a train or the like B60D; vehicles for use on rail and road, amphibious or convertible vehicles B60F; suspension arrangements B60G; heating, cooling, ventilating or other air treating devices B60H; windows, windscreens, non-fixed roofs, doors or similar devices, protective coverings for vehicles not in use B60J; propulsion plant arrangements, auxiliary drives, transmissions, controls, instrumentation or dashboards B60K; electric equipment or propulsion of electrically-propelled vehicles B60L; power supply for electrically-propelled vehicles B60M; passenger accommodation not otherwise provided for B60N; adaptations for load transportation or to carry special loads or objects B60P; arrangement of signalling or lighting devices, the mounting or supporting thereof or circuits therefor, for vehicles in general B60Q; vehicles, vehicle fittings or vehicle parts not otherwise provided for B60R; servicing, cleaning, repairing, supporting, lifting, or manoeuvring, not otherwise provided for, B60S; brake arrangements, brake control systems or parts thereof B60T; air-cushion vehicles B60V; motor-cycles, accessories therefor B62J, B62K; testing of vehicles G01M) - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A motor vehicle includes a body having a front apron, and an underbody. The body forms at least one left and one right front wheel house for receiving one front wheel each. The air-guiding devices have at least one left flow duct and at least one right flow duct. The at least one left flow duct opens in the underbody in front of the left wheel house. The at least one right flow duct opens in the underbody in front of the right wheel house. The respective exit opening is arranged in front of that region of the respective wheel house which is adjacent to the inner side, which faces the vehicle central plane, of the respective vehicle wheel in the straight-ahead position. ## Claims ### Claim 1 A motor vehicle comprising: a body having a front apron; and an underbody, wherein the body forms at least one left and one right front wheel house for receiving one front wheel each, duct-like air-guiding devices are provided in the front apron, said air-guiding devices having an air inlet in the region of the front of the vehicle and an air outlet in the region of the underbody, the air-guiding devices have at least one left flow duct and at least one right flow duct, the at least one left flow duct opens in the underbody in front of the left wheel house, the at least one right flow duct opens in the underbody in front of the right wheel house, the respective exit opening forming the air outlet is designed in such a manner that the air flowing through the flow duct exits counter to the direction of travel with a direction component downward, and the respective exit opening is arranged in front of that region of the respective wheel house which is adjacent to the inner side, which faces the vehicle central plane, of the respective vehicle wheel in the straight-ahead position. ### Claim 2 (depends on 1) The motor vehicle as claimed in claim 1, wherein the position of the respective exit opening and the extent thereof in the transverse direction of the vehicle are dimensioned in such a manner that the exit opening takes up or overlaps the distance from the inner side, which faces toward the vehicle center plane, of the respective vehicle wheel in the straight-ahead position as far as the inner side of the wheel house, the inner side facing the respective vehicle wheel, so that the entire width of that free part of the wheel house which is not taken up by the vehicle wheel in the straight-ahead position. ### Claim 3 (depends on 2) The motor vehicle as claimed in claim 2, wherein the respective exit opening has an exit cross section which is provided, at least on one longitudinal side, with a contour differing from a straight line. ### Claim 4 (depends on 3) The motor vehicle as claimed in claim 3, wherein the contour differing from the straight line is of stepped, zigzag shaped or wavy design or is provided with convex bulges lying laterally against one another. ### Claim 5 (depends on 4) The motor vehicle as claimed in claim 4, wherein the respective exit opening is of rectangular design in outline and is preferably arranged at a right angle to the vehicle central plane. ### Claim 6 (depends on 4) The motor vehicle as claimed in claim 4, wherein the contour of the respective exit opening is of curved design in outline, wherein its curvature substantially corresponds to the curvature of the front edge of the wheel house, as viewed in outline, or is approximate to said curvature. ### Claim 7 (depends on 6) The motor vehicle as claimed in claim 6, wherein at least one vortex-generating element is provided in front of the exit opening in the respective flow duct. ### Claim 8 (depends on 7) The motor vehicle as claimed in claim 7, wherein a ram lip or a displacer which protrudes downward from the underbody is provided on or in front of the front edge of the respective exit opening. ### Claim 9 (depends on 8) The motor vehicle as claimed in claim 8, wherein the upper wall of the flow duct is of concave, convex or concave-convex design in the region of the respective exit opening. ### Claim 10 (depends on 9) The motor vehicle as claimed in claim 9, wherein the upper wall of the flow duct has a concavely, convexly or concavely-convexly curved profile over the course of the flow duct.