Patent ID: 7540556

Claim:
A vehicle body frame formed as a hollow structure of a generally rectangular sectional shape and including a front compression wall portion where compressive stress is produced when an axial impact acts on the vehicle body frame, the vehicle body frame comprising: a main frame section made of light alloy and being in the form of a band extending along the vehicle body frame from a front end portion to a rear end portion of the vehicle body frame and having the front compression wall portion; and a sub-frame section made of steel and having a substantially U-shaped cross section, the sub-frame section being fixedly mounted to the main frame section and extending along a front part of the main frame section so as to form the hollow structure jointly with the front part of the main frame section and wall portions including inner and outer wall portions and upper and lower wall portions of the vehicle body frame, wherein the front compression wall portion is formed by a front part of the inner wall portion which is comprised of a front half lying parallel to a vehicle body centerline and a rear half bent a predetermined angle inwardly toward the vehicle body centerline at a front bent portion dividing the front and rear halves.