Abstract: In optional control circuit commonly used among multiple optional hydraulic actuators, it is necessary to enable back pressure reduction, part reduction, and downsizing when a breaker is mounted as an optional hydraulic actuator. A normal control region, where the discharge valve passage to the oil tank has an opening area of normal control range, and a back pressure reduction region, where the discharge valve passage has the back pressure reduction opening Aw whose opening area is larger than the maximum opening area in the normal control range, are installed at the operating position of optional control valve for controlling discharge flow rate of optional hydraulic actuator; when the optional hydraulic actuator is the breaker, the optional control valve is positioned at the back pressure reduction region (W), when the optional hydraulic actuator is not the breaker, the valve is positioned at the normal control region.

Abstract: A front subframe 42 is formed of an aluminum alloy into a frame that is formed substantially into a shape of parallel crosses or into a rectangular shape and is made up of left and right front joint portions 64, 64 and left and right rear joint portions 71, 71 which are disposed at corners of the frame that is formed substantially into the shape of parallel crosses or the rectangular shape, and left and right longitudinal members 61, 61, and front and rear cross members 62, 67 which connect the joint portions 64, 64, 71, 71 together. The left and right front joint portions 64, 64 and the left and right rear joint portions 71, 71 are formed of an aluminum alloy die-cast product, whereas the left and right longitudinal members 61, 61 are formed of an aluminum alloy wrought product. In addition, connecting locations 76 . . . of a camber angle adjusting mechanism 157 are formed of an aluminum alloy die-cast product. Additionally, a rear cross member compound 63 is formed of an aluminum alloy die-cast product.

Abstract: A front subframe 42 is formed of an aluminum alloy into a frame that is formed substantially into a shape of parallel crosses or into a rectangular shape and is made up of left and right front joint portions 64, 64 and left and right rear joint portions 71, 71 which are disposed at corners of the frame that is formed substantially into the shape of parallel crosses or the rectangular shape, and left and right longitudinal members 61, 61, and front and rear cross members 62, 67 which connect the joint portions 64, 64, 71, 71 together. The left and right front joint portions 64, 64 and the left and right rear joint portions 71, 71 are formed of an aluminum alloy die-cast product, whereas the left and right longitudinal members 61, 61 are formed of an aluminum alloy wrought product. In addition, connecting locations 76 . . . of a camber angle adjusting mechanism 157 are formed of an aluminum alloy die-cast product. Additionally, a rear cross member compound 63 is formed of an aluminum alloy die-cast product.

Abstract: A reinforcement member (32) of an automotive side sill includes a V-shaped cross-sectional portion (46) formed by bending the reinforcement member so as to follow a lower surface (31b) of an upper portion (31a) of an outer panel (31), joining an upper attaching portion (42) functioning as a resulting bent portion to the upper portion (31a) of the outer panel (31) and bending a distal end of the upper attaching portion (42) downwardly.

Abstract: A reinforcement member (32) of an automotive side sill includes a V-shaped cross-sectional portion (46) formed by bending the reinforcement member so as to follow a lower surface (31b) of an upper portion (31a) of an outer panel (31), joining an upper attaching portion (42) functioning as a resulting bent portion to the upper portion (31a) of the outer panel (31) and bending a distal end of the upper attaching portion (42) downwardly.