For many people, the anti-roll bar just a humble heart, but you may not know this inveterate child will your car have a significant impact, but you never really understand its function, and now we will take you on an exploration of the chassis of the secret. Anti-Roll Bar usually translated into anti-roll bar, to popular point you can call it the ' lever ' under. Reequipped two anti-roll bar while takes you more than 10 million budget, but it will get to play in improving economic efficiency are all converted project. General production car will be fitted with anti-roll bars but are mostly limited to the front, the aim is to reach a compromise with the comfortable manipulation. Anti-roll bars are usually fixed at the lower arm around suspension, the car in the corner will function when the centrifugal force in cars rolling roll Centre of the body caused by, resulting in a curved inner wheel and ocean shipping of suspension stretching and compression, anti-roll bar rod into reverse, the use of rod is to reverse the rebound to inhibit the body roll. The ' roll ' and we previously mentioned ' body scroll ' (Roll) is the same; the so-called ' scroll ' looked from the front direction as if his car in a portrait from the front through the rear axis, and then do the rotation. Of course this spin is small, if the angle of rotation is too large to be overturned, and that is really scroll.
The role of the anti-roll bar
When the left wheel walking the same pavement raised or hole, anti-roll bar does not produce effects. But if left and right wheels through different pavement raised or hole, which is the left wheel level height not at the same time, causing the reversal of the rod, the anti-roll resistance (Roll Resistance) inhibits body scroll. That is when the right and left hanging down synchronization action anti-roll bar does not work, only the left and right sides of suspension because pavement fluctuations or turn the corner caused no synchronization actions only when anti-roll bar. Anti-roll bar only in effect when the road of hard, unlike hard spring will complete the journey of harden. If you want to completely rely on spring to reduce body roll that may require very hard in the spring, with high damping coefficient of shock absorber to suppress spring bounce, so we have to endure hard springs and shocks arising such as line road, when walking on uneven road traces of undesirable sequelae. But if combined with appropriate anti-roll bar not only reduces the roll, to sacrifice their comfort and tracking. Therefore, anti-roll bars and spring mix is road and manipulation of the most viable method of compromise.
Anti-roll bar features
Anti-roll bar and spring provides the anti-roll resistance are mutually reinforcing, and anti-roll resistance is paired, i.e. front anti-roll resistance is and rear anti-roll resistance of incidental, but because the body weight ratio, and other external role of the relationship will allow before and after the anti-roll resistance does not balance, so we will have a direct impact on body weight transfer and manipulation of balance. If the rear wheels of the anti-roll resistance too general result (power Oversteer), on the other hand if the front of the anti-roll resistance is too low due to the General Assembly (Understeer). In order to improve control we can use anti-roll bar to control the body's scroll more can be used to control the body and rear anti-roll resistance proportional allocation. Anti-roll bar and the most important function is to achieve balance and limit controlled bending roll of body to improve tire patch to sex. The corner is curved inner wheel suspension elongation and bend the suspension is compressed ocean shipping, anti-roll bar will produce torsion suppression. It will be on a foreign ship in the sling sizing down pressure force on inner wheel lift the suspension of an application, to the applied force is about suspension equal opposite Unitarian. Too soft anti-roll bar in independent suspension car will result in the corner is excessive extraversion, reduce tire footprint, too hard is cause tire cannot close to the ground, the effect of manipulative. On curved inner wheel, anti-roll bar on wheels of force and spring on wheels of force is the opposite of the spring force to the wheel pressure back to Earth, and anti-roll bar but it will make it off the ground. If the anti-roll bar too hard will reduce wheel pressure back to Earth by force, if this happens in the driving wheel, may be made out of bent curved inner wheel when refueling grip smaller, causing tire of idling. It has large horsepower without LSD's car is quite dangerous, the ideal State is the anti-roll bar the anti-roll resistance control in total anti-roll resistance 20% ~ 50%. If the total anti-roll resistance is too strong, then may result in the corner is the curved inner wheel off the ground, so would result in 100% of the weight transfer, this typically occurs when the bending of the non-driven wheel. We can often see Porsche 911 bending forward curved inner wheel off the ground, the same situation also occurs in front of the bend in the driving wheel. The wheels off the ground is not a good sign, but sometimes for the whole suspension setting but also on the need to avoid. Body of scroll will reduce the trail or steering sensitivity. One has the best suspension geometry set of cars is a low-rolling Center, while the spring provides the anti-roll body resistance to scroll limit within reasonable limits. Spring affects tire posted to, the same spring the anti-roll resistance on the stick to tire also has a great effect. On a well-established suspension geometry, Center of gravity height and unladen weight of the car, the change would alter the anti-roll resistance limit the corner when body roll.
Anti-roll bars set
If a car too curved max limit of body scroll will result in suspension system to produce more than 2 degrees above the camber (Camber) changes, so that the car requires more anti-roll resistance. Body when scrolling over 2 degrees of camber change that requires at least 2 degree increase in negative camber, so that the tires when the limit is too curved maintain adequate tires stick to. But more than 2 degrees above the camber setting will reduce the car straight into the ground area when tire (Tire Contact Patch), and destroys the so-called ' instant tracking of ' (Transient Traction), that is from the car straight to curved road or pavement from ping to tilt the tracking of the moment. ThisControl balance, bending speed, into the bend and out of the Steering sensitivity curve will have a negative impact, the more impact-bending of the brake and accelerator performance. Limit body rolling another reason is to limit rolling Center (Roll Center) of longitudinal and lateral displacement changes on any type of suspension systems are very important, especially on MacPherson strut's suspension system. Scroll through the center of displacement will cause sudden weight transfer changes that cause damage to the car body control balance. To scroll through the body for race restricted to 1.5 to 2 degrees can scroll within the Centre of displacement limit in a controlled, but the General road car, put the body in the scroll limit of 4 degrees within even the very ideal. On the setting of the anti-roll bar to adjust the body scroll around the proportional allocation is important if we are to fully rely on spring to inhibit the body scroll, then you must use the stiff spring, this will reduce the walking trail of uneven road (see the June issue of car Economics), if you use the anti-roll bar you can easily adjust the balance of body control without affecting the tracking. Therefore in racing the front and rear anti-roll bars are generally adjustable in order to adjust the best control balance, and the General road used often is not adjustable. After driving in General will be installed in the anti-roll bar, so before the suspension may be increased before the suspension of the anti-heeling and reduce the corner after suspension of body weight transfer, this will delay or eliminate the corner at the driving wheels (curved inner wheel) off the ground and to increase the load on the Steering-bending ocean shipping, enhanced steering trend. And bold after anti-roll bar will enhance steering excessive trends, on the front drive, because the driving wheels at the front wheel so you will need to increase the hardness of the anti-roll bar, so you can increase the driving wheels of tracking and reduce front drive inherent steering characteristics. But if the rear wheel off the ground when bending over or body roll too seriously, you should consider in front-wheel-drive bold anti-roll bar to avoid this phenomenon. But on a serious steering car, usually as long as the bold front anti-roll bar can significantly improve the Steering shortage.
Anti-roll bar modification
Anti-roll bar of hardness is produced material, Rod, bar diameter, length and arm's and Rod the angle. Rod length, the longer the hardness is soft, instead of the longer arm length has increased its hardness. Limited by chekuan so Rod length is almost too can change, but the rod diameter and length of the lever arm is relatively easy to adjust. Generally speaking, anti-roll bar material are very similar, so you want to change the hardness of the anti-roll bar by changing the rod diameter to reach. In addition the role due to lever principle, change the suspension arm and anti-roll bar arm connection point can change the torque arm, adjustable anti-roll bar is here. Anti-roll bar of hardness can be expressed as follows: in addition, the fixed anti-roll bar rubber lining cushion replaced hard material will have you unexpected results in practical tests, with a diameter 0.8 inches of anti-roll bar with hard liners and use diameter 1.0 inches of anti-roll bar with rubber gaskets have the same effect. Anti-roll bar effect is manifested in the corner of the roll, to understand the extent of the roll on the best way is to use the camera to take when the limit the corner, and then the photos in the photo roll angle on the measure, replace the hard anti-roll bar rear in the same way and then shoot once more two angles to determine different. To calculate the required hardness of the anti-roll bar is very complex, not only to consider its hardness more consideration and spring mix, therefore only the continuous testing and testing, this is the only way to set on the chassis. When you decide to refit your chassis, in addition to the springs and shock absorber of the match, you should carefully consider your anti-roll bar, this knowledge is based on scientific theory, experience and continuous attempts, and modification of real pleasure here.
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