外文翻譯--汽車懸架工作原理-全文預(yù)覽
【正文】 were first used on horsedrawn carriages and were found on most American automobiles until 1985. They are still used today on most trucks and heavyduty vehicles. Torsion bars Torsion bars use the twisting properties of a steel bar to provide coilspringlike performance. This is how they work: One end of a bar is anchored to the vehicle frame. The other end is attached to a wishbone, which acts like a lever that moves perpendicular to the torsion bar. When the wheel hits a bump, vertical motion is transferred to the wishbone and then, through the levering action, to the torsion bar. The torsion bar then twists along its axis to provide the spring force. European carmakers used this system extensively, as did Packard and Chrysler in the United States, through the 1950s and 1960s. Air springs Air springs, which consist of a cylindrical chamber of air positioned between the wheel and the car39。s look at the parts of a typical suspension.The Chassis The suspension of a car is actually part of the chassis, which prises all of the important systems located beneath the car39。s vertical energy is transferred to the frame, which moves in the same direction. In such a situation, the wheels can lose contact with the road pletely. Then, under the downward force of gravity, the wheels can slam back into the road surface. What you need is a system that will absorb the energy of the vertically accelerated wheel, allowing the frame and body to ride undisturbed while the wheels follow bumps in the road. The study of the forces at work on a moving car is called vehicle dynamics, and you need to understand some of these concepts in order to appreciate why a suspension is necessary in the first place. Most automobile engineers consider the dynamics of a moving car from two perspectives: Ride a car39。ve evolved over the years and where the design of suspensions is headed in the future. 英文原文Vehicle Dynamics If a road were perfectly flat, with no irregularities, suspensions wouldn39。文獻綜述附錄3英文原文How Car Suspensions WorkBy William HarrisUniversity of MichiganWhen people think of automobile performance, t
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