Edited by Greg Locock, 17 June 2019 - 07:07.

He knew about them philosophically a lot more than he knew about them in a practical sense. Simpler than air bags and compressors and more fail safe . In most cars with this type of suspension, swapping torsion bars for a different spring rate is usually an easy task. I may never be able to show my face here again. Torsion Bar, how does it work?

Very light but maybe not to safe in a crash! The mechanical system doesn't care about the time domain, it's all resolved in the frequency domain. A later development saved even more weight by replacing he fuel pump with a fuel sphere pressurized to 215 psi . A torsion bar is a flexible spring that can be moved about its axis via twisting. These bars do this by absorbing some of that force by moving with the bumps rather than acting in opposition to them. This affects the car’s ride and handling, and accelerates tyre wear.

Meanwhile, Mercedes’ Active Curve Tilting function uses a camera to scan the road ahead and adjust the air springs to tilt the car towards the inside of the corner rather than away from it, as it naturally wants to. You currently have javascript disabled. They can be designed longitudinally of transversely. Or it fiddling the dampers a quicker fix? For each wheel, one rod was attached to the suspension arm, while another was mounted to a nearby point on the frame. Then you have to arrange for clearance for the torsion section of the spring along the chassis. Usually the ride guys specify what corner frequencies we want, to give a good ride. It is interconnected like a 2CV or BMC 1100 and has self levelling too. It never gets there. The way we do it now for road cars is to use a 'simple' 4 dof sideview model running over a variety of road surfaces. Using MacPherson struts to achieve independent front suspension with coil springs meant providing strong turrets in the frontal structure of the car. When a damper begins to wear out, fluid can leak from it making it less effective. The VW was hopeless and returned very slowly to the trailer, the Holden front coil was dangerous and was too driven very slowly to be replaced, rear shock with leaves was a bit bouncy but driveable and the Supermod was very how ya going. They were also used in the door mechanism of the DMC DeLorean automobile.

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. Now, in the context of 1950s-60s American barges quite what they mean by 'well' is open for discussion, but using shocks to make up for springing problems is by no means a dead art even now. Did they include graphs? The system first saw military use in the Swedish Stridsvagn L-60 tank of 1934. The Packard used torsion bars at both front and rear, and interconnected the front and rear systems to improve ride quality. First problem is designing the 'nut', or termination at the fixed end. Sounds like something I might have said, but thinking about it, done with care, there's no reason why antidive and antisquat HAVE to lock the suspension up any more than GRCH locks the car up in roll.

The car may sink a little before rising again but without bouncing. One special case of the torsion bar spring seems to have fallen out of favour - the  Z  bar. but now we've run out of room for the springs, because they are bigger to support the extra weight, so unless CAD redraw the body (resetting that 2 years) then we have to start compromising.

Torsion bars are designed and based on the amount of torque used in the twisting of the spring, the angle of the twist, the overall dimensions of the torsion bar and what materials the torsion bar is made from. At a time when the mechanics of stress and metal fatigue in monocoque body frames was poorly understood, torsion bars were very attractive to vehicle designers as the bars could be mounted to reinforced parts of the central structure, typically the bulkhead. An electric current passed through the fluid can change its viscosity, or thickness, in an instant in accordance with the force being applied to the damper. A spring is good at compressing and absorbing energy but not so good at releasing it, when it tends to rebound uncontrollably. are components of suspension system. One side of the bar is mounted solidly onto the frame, while the other end is mounted into the lower control arm of the front suspension.

Car Parts: Ford Capri Stainless Steel Bumper. A manufacturer may install a thicker bar for a bigger engine. Czechoslovakian Tatra's 1948 T600 Tatraplan employed rear torsion bar suspension, the only Tatra to do so.[2]. It looks like a thick, stubby bicycle pump. Thats what those big towers on the front of a Vee is. The most famous American passenger car application was the Chrysler system used beginning with the 1957 model year in cars such as the Imperial Crown series, although Chrysler's "Torsion-Air" suspension was only for the front; the same basic system (longitudinal mounting) was maintained until the 1981 introduction of the K-car. It was used extensively in European cars like Renault, Citroën and Volkswagen, as well as by Packard in the 1950s. Tightening this bolt turns a key that twists the torsion bar. Nathan, try wikipedia  https://en.wikipedia..._bar_suspension. When damper shaft speeds and frequencies are both 'low' or 'high', then it's easy to see what change is in order. Backing this bolt off lowers the suspension. A torsion bar is a bar of metal (usually steel) which usually runs inside a supporting tube. Check the vehicle's wheel alignment, because changing a vehicle's ride height affects several steering angles. Note- some part of this is copied so that could give you all i knew and i read They use torsion bars.

It seems that you have somehow re-opened this thread which was locked in the Archive. Torsion bars are designed and based on the amount of torque used in the twisting of the spring, the angle of the twist, the overall dimensions of the torsion bar and what materials the torsion bar is made from. The meat in this particular sandwich are the ride guys, at the cost of making our life more difficult we can keep everybody else happy. I put a leveling kit on my teenager's GMC Sierra with a torsion bar front suspension a couple of weeks ago. The car had a 2.2 litre engine but weighed only 382kg. It is filled with hydraulic fluid. Height adjustable suspension has been used to implement a wheel-change mode where the vehicle is raised on three wheels so that the remaining wheel is lifted off the ground without the aid of a jack. For crash reasons it has to point rearwards, spearing pedestrians being considered a bad idea.

Hi Greg. This seems to result in a tune that is good enough as a starting point, but I'm not convinced it is a whole lot better than just using the tune from the last production model as a baseline. I've turned the web upside down trying to find pics but, so far, without success. That’s important given how there are so many different forces acting on a car.

For a model I'm working on, I'm looking for pictures of the brackets on the Lotus 72 on the ends of the torsion bars to the linkage rods to the front wishbones and rear camber adjusters.

I have an old Toyota Tacoma truck. Because they have "give," the torsion bars minimize the impact of road bumps, and the car passengers stay more comfortable.

I don't, and I'd have thought Tim would be much more helpful than me on the track stuff, but as a first question what exactly can you adjust? Also, the adjustments we make to the dampers (bleed and shim stack preloads, mostly) translate to changing the damper forces w.r.t. I have had the misfortune over the years to have driven that buggy, an early Holden  with a broken front shock and a broken rear shock and recently my Supermodified with a broken l/r shock on a torsion bar  set up.



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