Twist-beam rear suspension
Jan 20, · Date: January 20, A sports car with torsion beam suspension. A torsion beam suspension borrows its design from a trailing arm suspension and is used primarily on small to mid-sized front-wheel drive vehicles. It utilizes a coil spring mounted in close proximity to, or over, the shock absorber. The torsion beam suspension is able to forgo the anti-roll bar due in part due to its ability to . Jan 19, · A novice can change a broken bar in minutes with simple hand tools and a car jack. A torsion bar is a type of spring that is typically used in automobile production and offers several benefits over the coil or leaf spring. Predominately used by Chrysler in the United States and several sports car manufacturers such as Porsche in Europe, the torsion bar suspension is easily adjustable and very .
When it comes to what's underneath your car, it's pretty easy not to otrsion much attention, unless it's a traffic cone, a wombat, or the sky. But, much like flossing, suspension is both tricky to get enthused about and a lot more important than it's given credit for. Even on a glass-smooth road, car suspension has its work cut out. Traversing a simple bend subjects your undercarriage to severe stresses and strains.
There are a multitude of methods that have been used to keep your wheels under control, with deeply confusing terms like Hotchkiss drive, Watt's link, swing axle, semi-trailing arm and De Dion tube which sounds syspension a '60s surf band, but isn't.
As suspensoon as they seem, each is basically a way to make the rear wheels do what you want and prevent them from reacting to cornering and road surfaces in unpredictable and potentially life-threatening ways.
Most of these arcane setups are outmoded these days, thanks to the two predominant methods widely adopted for keeping your car's rear end in check: semi-dependent torsion bars and fully independent suspension systems. But how do they work, how do they compare and should you consider one over the other when choosing your car? First things first; what do we mean by independent rear suspension?
Well, there are three basic ways to sort out a rear axle. In effect, this means that the motion of one wheel causes the other to gambol around and generally misbehave. It's the simplest, oldest and cheapest way of doing things, found on trucks, farm equipment and the Ford Falcon GLi. In the '94 Falcon, this caused hilarious amounts of oversteer at the slightest provocation and required a lot of Band-Aid engineering throughout successive models to patch up the live rear axle's shortcomings.
Keeping the wheels independent of each other but still connected requires more than a bit of tricky engineering. The notion of suspenwion suspension, then, seems like a self-evidently better how to rid lawn of moles and voles. The motion of each wheel is isolated — independent, if you will — from the other, free to move and react without introducing sympathetic movements on the other side of the car.
Keeping the wheels independent of each other but still connected to the body, brakes and drive shafts requires more than a bit of tricky engineering. Engineers have tackled this problem with varying degrees of complexity, but the best known are the MacPherson Strut, double wishbone and multi-link systems. As one of the simpler and therefore cheaper options for independent suspension, the MacPherson strut has seen widespread use since its invention back in the s.
Compared to the torsion bar system, the MacPherson strut is both large and expensive. Next to dual wishbone and multi-link systems, the MacPherson offers little in the way of control, isolation or adjustability. Generally speaking, MacPherson beqm have been relegated to the cheaper and more mainstream models, especially those designed for unstressed highway and city use. Manufacturers also tend to fit MacPherson struts to the front axle only, so we'll talk about them more another time.
Multi-link and dual wishbone systems are the holy grail of suspension designs, allowing engineers to achieve agile handling without compromising ride quality.
Both multi-link and dual-wishbone setups offer true independence and unparalleled control, with the multi-link system edging ahead of the double-wishbone choice toraion offering greater adjustability. Of course, nothing comes for free. Multi-link and double-wishbone independent setups are the most expensive and complex, as well as taking up more space than the simpler and slighter torsion beam.
Finding dual wishbone or multi-link suspension in your prospective new car usually means heading to the more premium end of the hatchback, wagon and sedan what is give and take. It also means being pretty selective in the SUV and light commercial segments.
Using a dual wishbone or multi-link system isn't the be-all and end-all, however. Think of them as the best method, like a great recipe for a delicious meal. It doesn't make everyone with a frying pan Heston Blumenthal, if you catch our drift. Haval, for instance, touted a multi-link tofsion end at the launch of its H8, which is commendable, but you still won't confuse that Chinese machine with a Ferrari.
As you might guess, semi-independent suspension is where the wheels are still connected but, thanks to inherent flexibility in the connections, can operate with a semblance of autonomy. So, that brings us, at last, to the torsion bar, also known as the twist beam, torsion beam, or any other variation on that theme.
And it what is torsion beam suspension is as simple, and ingenious, as that; a bar connecting both wheels that twists ever so slightly under duress, in order to give a degree of independence to each wheel's movements.
Under lateral side-to-side force, however, the torsion beam remains how to grind dance girls, to resist body roll, which lets you corner with how to tell if dryer is gas or electric. Simple, solid, sorted. Torsion bars take up less vertical space than MacPherson strut setups and less horizontal space than double wishbone and multi-link systems, netting more room for humans in the cabin and their stuff in the boot.
Torsion-beam setups are relatively cheap and easy to manufacture, install and maintain, but they don't offer the engineer anywhere near the same amount of freedom to balance comfort, agility and stability as independent systems do. Because torsion bars offer less isolation than independent systems, they can also allow more noise, vibration and harshness to filter into the cabin. Torsioon, in a well-soundproofed car that isn't driven in anger, these issues might never become apparent, let alone cause any grief.
It's only when demands for comfort, poise and stability outstrip what engineers can achieve with the torsion beam that independent systems really come into their own.
So, while independent suspension can be the best way to look after what's going on under your car, it's not always necessary, and you should seriously consider whether it's worth spending the extra money for a vehicle that's fitted with it. The good news is, while your money might be buying you a smaller car, it will Study shows top sellers are not always sispension most affordable cars to own. One of So you want to sell your car but have no idea whether to sell it how to cover short hair or Sorry, there are no cars that match your search.
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Dec 05, · Today we look at a type of suspension commonly used on front wheel drive cars known as twist beam or torsion beam suspension. This suspension is largely used. Torsion beam. So, that brings us, at last, to the torsion bar, also known as the twist beam, torsion beam, or any other variation on that theme. And it really is as simple, and ingenious, as that; a bar connecting both wheels that twists ever so slightly under duress, in order to give a degree of independence to each wheel's movements.
A torsion beam suspension borrows its design from a trailing arm suspension and is used primarily on small to mid-sized front-wheel drive vehicles. It utilizes a coil spring mounted in close proximity to, or over, the shock absorber. The torsion beam suspension is able to forgo the anti-roll bar due in part due to its ability to flex each side independently of the other when encountering a twisting force. Although not considered a performance suspension package, the torsion beam suspension has been used with success on vehicles marketed as limited performance vehicles such as Volkswagen's Golf GTI.
Popular among automobile designers for not intruding greatly into the rear foot wells of the passenger compartment, the torsion-type suspension system is inexpensive to produce and easily manufactured. The major difference between a torsion beam suspension and a torsion bar suspension is the spring utilization of each component. The beam uses a coil spring-mounted in conjunction with a shock absorber to cushion the ride of the vehicle.
In a torsion bar suspension , the torsion bar is, in fact, the spring and is engineered to flex and twist as the vehicle demands, effectively cushioning the ride. The torsion bar suspension also manages the vehicle's ride height by utilizing an adjustable "key" that is raised or lowered, effectively raising or lowering the stance of the vehicle. This torsion bar suspension system is used on passenger vehicles from sports cars to off-road trucks. A torsion bar suspension is crafted of a solid- spring steel , allowing the bar to flex and twist without breaking, whereas a beam suspension is commonly created by welding stamped steel components together in order to create a suspension system.
The suspension is able to flex slightly due to manufacturing tolerances, however, the system is not created with the flexing ability factored into the design.
With the coil spring and shock absorber taking care of the bumps in the road, the flexing ability of the beam is an unexpected bonus for the most part. When required due to damage from an accident or other reasons, the torsion beam is typically replaced as a singular unit and replaced with a new assembly. Unlike a straight axle that mounts the wheels on a single axle suspended by a typical set of leaf-type springs, the torsion beam suspension uses an H- or C-shaped assembly mounted to the vehicle's chassis.
This assembly is accompanied by coil springs to dampen the rough spots in the road. The shape of the assembly contributes to its flexibility. Please enter the following code:. Login: Forgot password?