Please select the most similar patent number from A, B, C and D. Which number is?
A fuel rail assembly and internally-installed damper holders for same, said fuel rail assembly comprising a fuel rail, a first and a second plug used for sealing same, internally-installed dampers, and a first holder and a second holder for said dampers; the internally-installed dampers are provided each with a first and a second end portion, said first and second end portions comprising each a main body having an uplifted portion upon same. The holders comprise: clamping portions provided with gaps, and a first and a second fixing portion fixedly connected by means of a first and a second flexible portion to the clamping portions respectively. The first and the second holders for the internally-installed dampers are held in place by the first and second plugs respectively, and the main bodies of the first and second end portions of the internally-installed dampers are contained within the gaps of the first holder and the second holder respectively of the dampers, thus inhibiting movement of the internally-installed dampers in a first and a second directions; meanwhile the uplifted end portions are blocked within the clamping portions, thus inhibiting movement of the internally-installed dampers in a third direction. Said dampers are thus fixed steadily within the fuel rail.
A: A new-type damping device for a #-shaped building. The damping device comprises a first building beam (1), a second building beam (2), a third building beam (3) and a fourth building beam (4). The first building beam (1), the second building beam (2), the third building beam (3) and the fourth building beam (4) are arranged to be in a #-shaped structure. By means of the arrangement of a viscoelastic damper (12), under the effect of the viscoelastic damper (12), a fixing plate (13) drives a polymer damping layer (16) on a sliding plate (14) to shake left and right in a hysteresis groove in a restraining frame (15), and energy is dissipated by shearing hysteresis deformation of the polymer damping layer (16), such that the #-shaped structure composed of the first building beam (1), the second building beam (2), the third building beam (3) and the fourth building beam (4) has energy dissipation and shock absorption functions in the left-right direction. By means of the arrangement of a viscous fluid damper (9), the #-shaped structure composed of the first building beam (1), the second building beam (2), the third building beam (3) and the fourth building beam (4) has the energy dissipation and shock absorption functions in the front-back direction.
B: Disclosed is a buffering hinge, comprising a first clamping plate and a second clamping plate; the first clamping plate and/or the second clamping plate is internally provided with a buffering mechanism; the buffering mechanism comprises a fixed pressing block, a moving pressing block which moves along the vertical direction, and a vertically-positioned damper, the two ends of the damper being respectively vertically connected to the fixed pressing block and the moving pressing block; a first inclined surface of the moving pressing block and a second inclined surface of the other clamping plate form an opposing connection. The present invention, by means of arranging a buffering mechanism within the first clamping plate and/or the second clamping plate, and allowing the damper to be subjected to vertical upward action force, thereby increases the buffering effect and the service life of the damper; also, the opposing connection between a first inclined surface of a moving pressing block and a second inclined surface of the other clamping plate allows the moving pressing block and the fixed pressing block to realize vertical movement, thereby driving the damper to achieve vertical lengthening and shortening.
C: Disclosed is a fuel rail assembly for an engine with direct ethanol-fuel injection via a manifold, comprising a fuel rail main pipe (3), branch pipes (8), rail mounting supports (2), and a joint pipe (7). The cross-section of the interior of the fuel rail main pipe (3) is square-shaped, the branch pipes (8) and the rail mounting supports (2) are provided on one side in the axial direction of the fuel rail main pipe, while the joint pipe (7) is provided at the fuel-inlet end of the fuel rail main pipe (3).
D: An improved buffering hinge, comprising a housing (1), a first rotational shaft (51), a U-shaped pin shaft (21), a hinge cup (2), a first linkage member (3), a second rotational shaft (52), a torsion spring (4), and a second linkage member (5), the hinge cup (2) being fixed onto a door panel. A damper guide member comprises a guide rack (6) provided between the second linkage member (5) and the housing (1). The housing (1) is formed by enclosing left and right side plates and an upper side plate (10), and is provided with a damper (8) and the damper guide member. The output direction of a piston rod (82) of the damper (8) is oriented to the upper side plate (10). The hinge effectively reduces its production costs, and overcomes noise generated by the friction between parts and the defect in the overall rotating smoothness of a product, thereby improving the overall quality and the market competitiveness of the product.
Answer: C