# US 2019/0168826 A1 · Front diffuser for a vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0168826 A1 - Document ID: US20190168826A1 - Status: Published application - Kind: A1 - Application number: 16/191,475 - Filed: 2018-11-15 - Published: 2019-06-06 - Earliest claimed: 2017-12-05 - Assignees: Dr. Ing. h.c. F. Porsche Aktiengesellschaft - Applicants: Dr. Ing. h.c. F. Porsche Aktiengesellschaft - Inventors: Thomas Wolf - Web page: https://patentgrep.com/patent/US20190168826A1 ## CPC - B62D 35/005: {Front spoilers (B62D35/001 takes precedence)} - B62D 37/02: by aerodynamic means - B60T 5/00: Vehicle modifications to facilitate cooling of brakes - B62D 35/02: Streamlining the undersurfaces {(B62D35/005, B62D35/007, B62D35/008 take precedence)} - F16D 65/807: with open cooling system, e.g. cooled by air - F16D 65/827: with open cooling system, e.g. cooled by air - F16D 65/847: with open cooling system, e.g. cooled by air - 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) - B60T: VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL (electrodynamic brake systems for vehicle, in general B60L; brakes per se, i.e. devices where braking effect occurs, including ultimate brake actuators, F16D); ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES - F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A front diffuser for disposal in a region of an underbody cladding of a vehicle includes a diffuser wall defining a diffuser duct having an inflow side and an outflow side and an air guide device mounted so as to be rotatable about a predefined rotation axis and configured to, by way of a rotating movement, move from a first rotary position at least partially into the diffuser duct to a second rotary position and move from the second rotary position at least partially out of the diffuser duct to the first rotary position. The air guide device is configured as a molding and includes a first external face and a second external face. ## Claims ### Claim 1 A front diffuser for disposal in a region of an underbody cladding of a vehicle, the front diffuser comprising: a diffuser wall defining a diffuser duct having an inflow side and an outflow side; and an air guide device mounted so as to be rotatable about a predefined rotation axis and configured to, by way of a rotating movement, move from a first rotary position at least partially into the diffuser duct to a second rotary position and move from the second rotary position at least partially out of the diffuser duct to the first rotary position, wherein the air guide device is configured as a molding and includes a first external face and a second external face, wherein the first external face in the first rotary position faces the diffuser duct and extends from the rotation axis toward the outflow side, and wherein the first external face in the second rotary position faces the inflow side, and the second external face on an external periphery of the first external face adjoining the first external face, wherein the second external face in the second rotary position faces the outflow side, and wherein the second external face, at least in portions, does not run parallel with the first external face. ### Claim 2 (depends on 1) The front diffuser as claimed in claim 1, wherein the transition between the first external face and the second external face has a kink. ### Claim 3 (depends on 1) The front diffuser as claimed in claim 1, wherein the second external face at least in portions is configured so as to be convex. ### Claim 4 (depends on 1) The front diffuser as claimed in claim 1, wherein the second external face at least in portions has a circular cross section. ### Claim 5 (depends on 4) The front diffuser as claimed in claim 4, wherein a geometric center of the circular cross section lies at least partially on the rotation axis. ### Claim 6 (depends on 1) The front diffuser as claimed in claim 1, wherein the front diffuser has two side walls disposed on axial sides of the air guide device. ### Claim 7 (depends on 1) The front diffuser as claimed in claim 1, wherein at least that region of the air guide device that in the second rotary position is disposed in the diffuser duct has a compact surface. ### Claim 8 (depends on 1) The front diffuser as claimed in claim 1, the front diffuser having a housing region, the housing region being configured for at least partially receiving the air guide device in the first rotary position. ### Claim 9 (depends on 1) The front diffuser as claimed in claim 1, wherein the first external face at least partially covers the housing region when the air guide device is in the first rotary position. ### Claim 10 (depends on 1) The front diffuser as claimed in claim 1, wherein the air guide device is rotatable into the diffuser duct so far that the first lateral face projects from the diffuser wall at an angle which is in the range from 70° to 110. ### Claim 11 (depends on 1) The front diffuser as claimed in claim 1, wherein the air guide device is configured as a hollow body or as a solid body. ### Claim 12 (depends on 1) The front diffuser as claimed in claim 1, the front diffuser having an actuator, the actuator being configured to cause a controlled rotation of the air guide device about the rotation axis. ### Claim 13 (depends on 1) A vehicle having an underbody cladding, in which vehicle at least one front diffuser as claimed in claim 1 is disposed on the underbody cladding.