double-wishbone suspension, also known as double A-arm type independent suspension, double-wishbone suspension fork has two upper and lower arms, while the transverse forces absorbed by the two fork arms, the struts carry only the weight of the vehicle body, so a large lateral stiffness.
noun 1 double wishbone interpretation
double-wishbone suspension, also known as double A-arm type independent suspension, double-wishbone suspension fork has two upper and lower arms, the lateral force of the two wishbones while absorbing strut carries only the weight of the vehicle body, so a large lateral stiffness. Basic Characteristics
2. The double-wishbone suspension
Various parameters
double-wishbone suspension wishbone upper and lower A-shaped front wheel can be precisely positioned when the nose wheel steering, two upper and lower wishbones can absorb suffered tire lateral force, combined with two lateral stiffness fork arm is large, a smaller turning roll. Double-wishbone suspension usually vertical unequal length wishbones (the short length), so that the outer wheels can be automatically changed when the vertical movement and the inclination angle is reduced to reduce the tire wear gauge changing, adaptively, and the road, the tire ground contact area, stick to good. Double-wishbone suspension excellent mobility, Ferrari, Maserati supercar other use.
3. The constructional principle of the double-wishbone suspension
double-wishbone suspension unequal V-shaped or A-shaped control arm and the strut-type hydraulic damper constituted by the two upper and lower , the control arm is generally shorter than the control arm. One end of the control arm on the shock absorber strut is connected to the other end is connected to a vehicle body; end of the lower control arm is connected to the wheels, and the other end connected to the vehicle body. Further the upper and lower control arms are connected by a connecting rod, which tie rods also further connected with the wheel. Throughout the suspension structure by connecting a plurality of the upper and lower pivot of the control arm, and improve the integrity of the entire suspension.
If the vehicle is front wheel drive, then the double wishbone suspension assembly to the front wheel in between upper and lower control arms in addition equipped with a transmission mechanism, there are a steering mechanism, which makes its structure than does with rear wheel steering mechanism is much more complex. In the steering mechanism, the steering mainIs determined by the connecting pin and the position angle of the steering control of the tray and the upper and lower arms, the steering wheel is rotatable about the main pin, but also to control the beating with the lower arm. In the double-wishbone suspension connected commonly employed to meet the ball movement needs front wheel: the upper and lower control arm kingpin support is connected to both the front portion and also to achieve control of the steering wheel vertical jitter. However, due to the difference in length of the upper and lower control arms issues, which also double-wishbone suspension design posed a severe test – if the length of the upper and lower control arms of difference is too small, too large will cause the track around the wheel shake, accelerate tire outer wear; the other hand, if the upper and lower arm length difference is too large, it will cause the outer wheel when the steering angle is too large, the inner accelerated tire wear. Thus, it is possible to reduce variation in the control track outside the tilt angle change and by increasing the length of the upper and lower control arms.
Further, the upper and lower control arms of a double wishbone suspension counteract the lateral force can play effect, which makes it no longer withstand the shock absorber strut lateral force, but only respond to shake up and down the wheels, so It has good directional stability on a bend. Known as “corner king” reputation Mazda front suspension 6 is employed double wishbone suspension. Therefore, roll in corners Mazda 6 traveling in a smaller, the overall sense of the body is kept very well.
4. The double-wishbone suspension disadvantages
● advantages
lateral rigidity, excellent anti-roll resistance, good grip performance , road feel clear.
First, the precise positioning of the control parameters, so that the wheels can be a good close to the ground, a strong transverse rigidity and provides good lateral support for the handling of the vehicleEnergy, the advantages of this structure is obvious, it is not only Ferrari, Lamborghini and Maserati sports car of choice for these, even today’s F1 car used in the suspension structure can still see the shadow of the double wishbone. And two triangular configuration of the rocker arm also has excellent lateral stiffness and torsional strength, and therefore often use double-wishbone suspension structure on hardcore pickup or SUV, and the structure of the double-wishbone front bridge is integrally hardcore off-road SUV’s classic structure. Like Grand Cherokee, Toyota and VW Touareg Prado, front suspension are inserted by double arm suspension structure.
● disadvantages
high manufacturing costs, complex suspension positioning parameter setting.
relative to the McPherson suspension, its structure is more complicated, larger space, high cost, and therefore not suitable for small car front suspension, in addition, requires accurate location parameters determined and calculated calibration for the manufacturer’s technical strength is relatively high.