Torsion bars suspension

Introduction construction & working principles of Torsion bar suspension system

1. T o r s i o n B a r s i n s u s p ension s y s t e m ( A u t o mobile ) B Y D . M a h e s h G . L o k e s h M a n o j

2. suspension system i s a mechanical system of springs or shock absorbers connecting the wheels and axles to the chassis of a wheeled vehicle. C o n t r o l A r m Steering k n u ckle B a l l j o i n t s S p r i n g s S h o c k absorber S u s p e n sion : B a s i c p a r t s o f s u s pension

3. L eaf springs C oil springs T orsion bars A ir springs . T y p e s o f s u s p e nsion s : P u r p o s e o f s u s p e nsion i n c a r : S u p p o r t s t h e w e i g h t P r o v i de s a s m o o t h d r i v e K e e p s t i r e s i n f i r m contact w i t h t h e r o a d I t i s o l a t e s t h e passengers a n d c a r g o f r o m v i b r a tion a n d s h o c k

4. A torsion bar is a type of suspension system in an automobile is usually used in vehicles such as cars, trucks and vans. A torsion bar suspension system is a significant and acute element of a vehicle’s design They keep the tires in contact with the surface of the road, upkeep the weight of a vehicle and absorb the forces produced by the movement and motion of the vehicle. I n t r oduction : T o r s ion bar suspension

5. Torsion bar suspensions are basically metal bars that perform the role of a spring. At one end, the bar is fixed rigidly in place to the chassis of a vehicle. The last end of the bar may be fastened to the axle, suspension arm, or a spindle, depending on the vehicle’s design. For instance a vehicle travels alongside the road, the forces made by the motion of the vehicle produce torque on the bar, which turns it along its axis. C o n s t ruction :

6. Counteracting the torque is the fact that the torsion bar obviously wants to resist the twisting effect and return to its normal state. By doing so, the suspension supplies a level of resistance to the forces generated by the movement of the vehicle. This resistance is the basic principle behind a torsion bar suspension system. C o n t . . . .

7. The working principle of a torsion bar is a shaft under torsion stresses. There is no other kind of force being applied and material is working up to the elastic limit.Torsion bars use the twisting properties of a steel bar to offer coil-spring-like functions. One end of a bar is fixed rigidly to the vehicle frame. The further end is fastened to a wishbone, which acts like a lever that travels perpendicular to the torsion bar . W o r k i n g :

8. When the wheel hits at a stone or projections, vertical motion is shifted to the wishbone and then, through the levering act, to the torsion bar. The torsion bar then twists sideways its axis to offer the spring force. The torsion bar is basically a length of metal rod anchored at one end to the car body and at the other end to the suspension lower link. As the wheel passes over a bump the bar twists. It returns to its original position when the bump is passed and restores the car to its normal drive height.

9. Adjust the torsion bar. Turning the adjustment bolt clockwise will tighten it, raising the amount of load that can be placed on the bar. This will raise the vehicle when it is taken off the jack stand. Turning it counterclockwise will lower the available spring rate and cause the car to sit lower .

10. Some vehicles use torsion bars to provide automatic levelling, using a motor to pre-stress the bars to provide greater resistance to load and, in some cases to respond to changes in road conditions. F e a t ures o f T o r s i on b a r s u s p ension When adjusted, the torsion bar beneath your vehicle raises and lowers your front tires. While you can adjust this bar to create a large wheel gap between your tire and fender, you can also lower the height of your car. Before making any changes to your vehicle, measure the wheel gap on both sides of your car or truck.

11. T orsion bars of typically constructed from steel or rubber. They are often used for heavy-duty applications, such as the suspension of trucks and tanks. Torsion bar suspension is extremely durable because of its mechanical simplicity. It is also compact and allows for easy adjustments

12. Torsion bar suspensions are used on combat vehicles and tanks like the T-72, Leopard 1, Leopard 2, M26 Pershing, M18 Hellcat and on modern trucks and SUVs from Ford, Chrysler, GM, Mitsubishi, Mazda, Nissan, Isuzu, LuAZ, and Toyota. A p p l i cation Drive shaft Lower and Upper shoulder Shock absorber Anti-roll bar Front differentia l Subframe. K e y c o m p onent s o f t o r s i o n b a r s u s p e nsion

13. S oft ride due to elasticity of the bar L o n g D urability E asy adjustability of ride height and small profile along the width of the vehicle I t takes up less of the vehicle's interior volume than coil springs. I t can be produced quickly and at a minimal cost T hey're easy to maintain T heir parts can be easily replaced R estores the car to its normal drive height. A d v a n t a g e s :

14. D i s a d v a n t a ges : I t D o not offer progressive spring rate. T h e coils of the spring are spaced at dissimilar distances from each other In most torsion bar systems, ride height may be changed by simply adjusting bolts that connect the torsion bars to the steering knuckles . W hen the torsion bars are set to maximum height, the truck's ride tends to turn horribly harsh

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