# US 2022/0033015 A1 · Undercover structure > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2022/0033015 A1 - Document ID: US20220033015A1 - Status: Published application - Kind: A1 - Application number: 17/383,902 - Filed: 2021-07-23 - Published: 2022-02-03 - Earliest claimed: 2020-07-28 - Assignees: Honda Motor Co., Ltd. - Applicants: Honda Motor Co., Ltd. - Inventors: Kei AMBO; Kenichi ANDO; Yuki NAKAMURA; Yoji SUWA; Mohd SYAFIQ - Web page: https://patentgrep.com/patent/US20220033015A1 ## CPC - B62D 35/02: Streamlining the undersurfaces {(B62D35/005, B62D35/007, B62D35/008 take precedence)} - B62D 25/2072: {Floor protection, e.g. from corrosion or scratching (floor mats B60N3/04, armour F41H7/042, insulation B60R13/08, streamlining B62D35/02)} - B62D 37/02: by aerodynamic means - 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 In an undercover structure according to the present invention, a first cover part that is a lowermost part of an undercover has a first rear end positioned ahead of a front wheel axle. This generates a strong negative pressure in a region ahead of the front wheel axle. Accordingly, a flow rate of air flowing to a wheelhouse decreases (a flow rate of airflow between a road and a vehicle generated along a bottom surface of the first cover part of the undercover increases). This causes an attraction force that attracts the vehicle to a road surface to act on a vehicle body of the vehicle, thereby making traveling stability more excellent. ## Claims ### Claim 1 An undercover structure comprising an undercover provided on a vehicle body of a vehicle to cover a lower part of the vehicle body, wherein the undercover has a lowermost part positioned ahead of a front wheel axle. ### Claim 2 (depends on 1) The undercover structure according to claim 1, wherein the undercover includes a first cover part disposed at a front side of the lower part of the vehicle body of the vehicle and a second cover part which is disposed at a rear side of the first cover part and extends rearward, and the first cover part of the undercover has a first front end provided on the vehicle body and is positioned higher than a first rear end of the first cover part. ### Claim 3 (depends on 2) The undercover structure according to claim 2, wherein the second cover part of the undercover has a second rear end provided on the vehicle body. ### Claim 4 (depends on 2) The undercover structure according to claim 2, wherein at least the first cover part of the undercover has a side-view shape following or approximating a spline curve. ### Claim 5 (depends on 2) The undercover structure according to claim 2, wherein the first cover part extends for a length nearly equal to a vehicle width of the vehicle. ### Claim 6 (depends on 1) The undercover structure according to claim 1, wherein the undercover has the lowermost part positioned near a front end of a wheelhouse. ### Claim 7 (depends on 5) The undercover structure according to claim 5, wherein the first cover part has a side air guide part provided ahead of a front end of a wheelhouse, the side air guide part extending to a vicinity of an end of the vehicle in a vehicle width direction. ### Claim 8 (depends on 7) The undercover structure according to claim 7, wherein the side air guide part has a side-view shape following or approximating a spline curve. ### Claim 9 (depends on 7) The undercover structure according to claim 7, wherein the side air guide part is provided integrally with the first cover part of the undercover. ### Claim 10 (depends on 2) The undercover structure according to claim 2, wherein the first cover part of the undercover has the first front end supported in contact with a vicinity of a front lower end of a front bumper. ### Claim 11 (depends on 1) The undercover structure according to claim 1, wherein the undercover is supported movable in an up-down direction relative to the vehicle body of the vehicle. ### Claim 12 (depends on 11) The undercover structure according to claim 11, wherein the undercover is movably supported by an actuator.