# US 11,027,779 B2 · Front vehicle body structure > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,027,779 B2 - Document ID: US11027779B2 - Status: Granted - Kind: B2 - Application number: 16/623,804 - Filed: 2017-07-07 - Published: 2020-07-02 - Granted: 2021-06-08 - Earliest claimed: 2017-07-07 - Assignees: Honda Motor Co., Ltd. - Applicants: Honda Motor Co., Ltd. - Inventors: Keisuke Takakuwa - Web page: https://patentgrep.com/patent/US11027779B2 ## CPC - B62D 21/11: with resilient means for suspension {, e.g. of wheels or engine; sub-frames for mounting engine or suspensions} - B62D 21/155: {Sub-frames or underguards} - B62D 25/082: {Engine compartments} - B62D 27/02: rigid - B62D 27/06: readily releasable - B62D 29/008: {predominantly of light alloys, e.g. extruded} - 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) ## Abstract A front vehicle body structure includes a sub-frame. The sub-frame includes left and right longitudinal frames which extend in a longitudinal direction of a vehicle body and a horizontal frame which connects rear portions of the left and right longitudinal frames. The left longitudinal frame includes a steel frame and a light metal frame. A rear member of the steel frame overlaps the light metal frame in a vertical direction and is joined to the light metal frame. The left longitudinal frame includes a bent portion. The bent portion is provided on the front side of the vehicle body with respect to a front end portion of the light metal frame. ## Claims ### Claim 1 A front vehicle body structure in which a sub-frame is provided below a power unit room of a front portion of a vehicle, wherein the sub-frame includes a pair of longitudinal frames extending in a longitudinal direction of a vehicle body and a horizontal frame connecting rear portions of the longitudinal frames, wherein the longitudinal frame includes a steel frame made of steel and a light metal frame made of light metal, wherein the steel frame is configured by: a front member which has a closed cross-section extending in the longitudinal direction of the vehicle body and is not joined to the light metal frame by friction stir welding; and a rear member which is disposed below the light metal frame and is joined to the light metal frame by friction stir welding, wherein a rear portion of the front member is joined to a front end portion of the rear member, wherein the longitudinal frame includes a bent portion to be a starting point at which the longitudinal frame is bent in the vertical direction, and wherein the bent portion is provided in a portion on the front side of the vehicle body with respect to the front end portion of the rear member in the front member of the steel frame on the front side of the vehicle body with respect to a front end portion of the light metal frame. ### Claim 2 (depends on 1) The front vehicle body structure according to claim 1, wherein the sub-frame includes a mount member for attaching the sub-frame to the vehicle body, wherein the light metal frame has a second closed cross-section extending in the longitudinal direction of the vehicle body between the light metal frame and the rear member, wherein the second closed cross-section has a narrow closed cross-section decreasing in cross-section in a vehicle width direction, and wherein a mount fastening portion fastening the mount member, the light metal frame, and the front member is provided in a corresponding portion of the narrow closed cross-section in the vehicle width direction. ### Claim 3 (depends on 2) The front vehicle body structure according to claim 2, wherein the mount member includes a second mount fastening portion fastened to the narrow closed cross-section. ### Claim 4 (depends on 1) The front vehicle body structure according to claim 1, wherein the sub-frame includes a vertical fastening portion fastening the steel frame and the light metal frame in the vertical direction, and wherein a joint portion obtained by joining the steel frame and the light metal frame through friction stir welding is provided on the rear side of the vehicle body with respect to the vertical fastening portion.