Torsion Bar

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torsion bar

[′tȯr·shən ‚bär]
(mechanical engineering)
A spring flexed by twisting about its axis; found in the spring suspension of truck and passenger car wheels, in production machines where space limitations are critical, and in high-speed mechanisms where inertia forces must be minimized.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Torsion Bar


a bar that operates by twisting and acts as a spring. Torsion bars are manufactured from heat-treated steel, which tolerates great torsional stress and twisting through large angles (tens of degrees). They are used mainly in vehicle suspensions and multistage reducers to equalize the torque between parallel gears.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
The rear end is suspended by a simple yet space-efficient torsion beam, Honda reasoning that if it could make the feisty Type-R work, and work well, with a torsion beam rear, then there was clearly nothing wrong with the fundamental layout.
The Coupled Torsion Beam Axle rear suspension introduced in 2011 was a smart move, dialling out the understeer its predecessor had, and was also more tunable than the old suspension.
There's nothing revolutionary about the suspension which is fairly standard set-up with MacPherson struts up front and a torsion beam at the rear.
The vehicle is mounted on independent McPherson strut front suspension with coil springs and stabilizer bars, and semi-independent torsion beam, coil springs and stabilizer bars at the rear, with front disk brakes but drum rear brakes.
Stiffened by the addition of 36 spot welds, the body shell also accommodates a new rear torsion beam and a new support beam for the dashboard.
Apart from the change in drivetrain, the Duster AWD features independent multi-link suspension at all four corners, as opposed to the FWD's torsion beam setup at the rear.The other changes made to the car include a different set of alloy wheels, a darkened headlamp cluster and a matte black B-pillar.
The rear suspension has a stiffer torsion beam with softer coil springs and the front also uses softer springs and new dampers that reduce vibrations from the road surface.
The suspension, with independent MacPherson struts up front and rear torsion beam -- is compliant and absorbs and manages all but the worst road bumps.
Venant torsion beam theories are used to derive the governing differential equations of motion and a classical finite element solution is developed.
Externally, the Auris Touring Sports is the same as its hatchback stablemate but the longer body has a strengthened fifth door frame to improve rigidity and the rear suspension is either a torsion beam or, on more powerful versions, double wishbones.
The Swift DZire offers a perfect suspensions - the front integrating a MacPherson strut with coil spring and the rear featuring a torsion beam with coil spring - provide higher mounting rigidity and confident stability, said a senior official.
The higher body rigidity on account of McPherson strut suspension at the front and H Type torsion beam suspension at the rear offers solid road handling and a supple ride.