The,Knowledge,about,Double,wis car The Knowledge about Double wishbone suspension systems&#
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The following three examples are allvariations on the same theme.Coil Spring type 1 This is a typeof double-A or double wishbone suspension. The wheelspindles are supported by an upper and lower 'A' shaped arm. In this type, thelower arm carries most of the load. If you look head-on at this type of system,what you'll find is that it's a very parallelogram system that allows thespindles to travel vertically up and down. When they do this, they also have aslight side-to-side motion caused by the arc that the wishbones describe aroundtheir pivot points. This side-to-side motion is known as scrub. Unless thelinks are infinitely long the scrub motion is always present. There are twoother types of motion of the wheel relative to the body when the suspensionarticulates. The first and most important is a toe angle (steer angle). Thesecond and least important, but the one which produces most pub talk is thecamber angle, or lean angle. Steer and camber are the ones which wear tyres.Coil Spring type 2 This is also a type of double-Aarm suspension although the lower arm in these systems can sometimes bereplaced with a single solid arm (as in my picture). The only real differencebetween this and the previous system mentioned above is that the spring/shockcombo is moved from between the arms to above the upper arm. This transfers theload-bearing capability of the suspension almost entirely to the upper arm andthe spring mounts. The lower arm in this instance becomes a control arm. Thisparticular type of system isn't so popular in cars as it takes up a lot room.Multi-link suspension This is the latest incarnation of thedouble wishbone system described above. It's currently being used in the AudiA8 and A4 amongst other cars. The basic principle of it is the same, butinstead of solid upper and lower wishbones, each 'arm' of the wishbone is aseparate item. These are joined at the top and bottom of the spindle thusforming the wishbone shape. The super-weird thing about this is that as thespindle turns for steering, it alters the geometry of the suspension bytorquing all four suspension arms. They have complex pivot systems designed toallow this to happen.Car manufacturers claim that this system gives even better road-holdingproperties, because all the various joints make the suspension almostinfinitely adjustable. There are a lot of variations on this theme appearing atthe moment, with huge differences in the numbers and complexities of joints,numbers of arms, positioning of the parts etc. but they are all fundamentallythe same. Note that in this system the spring (red) is separate from the shockabsorber (yellow).Find out more about Volvo control arm Chinamanufacturer by visit lemdor.com.
The,Knowledge,about,Double,wis