車(chē)輛工程專(zhuān)業(yè)畢業(yè)設(shè)計(jì)外文翻譯5-其他專(zhuān)業(yè)-在線瀏覽
2025-03-24 01:45本頁(yè)面
【正文】 automatic. The main technologies are continuously variable transmissions (CVTs)。 headnod effect on passengers can be wearing. The driver39。 around 96percent of the energy that is put in es out of the other end. But not everyone can drive one or wants to. Because you have to dip the clutch pedal, it39。外文資料 1 Transmissions Transmissions have to promise on either ride fort or efficiency, but a new approach to the dog engagement gearbox could improve both. With tightening emissions regulations, carmakers are not just confining their efforts to improving bustion and aftertreatment. Many are finding that modern engines are so advanced that the benefits of some engine technologies are small pared to the huge development costs involved. It39。s important to look at the whole vehicle in order to improve emissions. As the second most expensive piece of kit in the car, the transmission is the logical next place to look. Of all transmission technologies, the manual gearbox is the most efficient。s less fortable to drive in heavy traffic. It makes the driver tired and the torque interruptions39。s clutch control and corresponding torque interruptions are also the manual39。 dual clutch transmissions(DCTs) and automated manual transmissions(AMTs).They all offer different benefits over the conventional plaary automatic. The CVT uses a belt chain or toroidal shaped dish drive to vary an infinite number of gear ratios. It has improved efficiency and cost when pared to conventional advantage es from its simplicitu. It consists of very few ponents。 a hydraulically operated driving pulley, a mechanical torquesensing driving pulley, microprocessors and some sensors. The transmissions works by varying the distance between the faces of the two main pulleys have Vshaped grooves in which the connecting belt rides. One side of the pulley is fixed axially。s biggest draw for automotive engineers. Because of this, a CVT can work to keep the engine in its optimum power range, thereby increasing efficiency and mileage. A CVT can convert every point on the 外文資料 2 engine39。s approach is an upgrade to the AMT. The synchromesh is replaced with an advanced dog enqaqement system. Dog engagement has been used for many years in motor sport to allow fast shifts. Conventional dog boxes are unsuitable for road use as the large spaces between the drive lugs or dogs create backlash, an unfortable shunt caused by the sudden change in torque direction. Zeroshift39。d expect from a dog engagement gearbox. To shift up with an open throttle, first gear39。 sales there still lag behind those of BMW, Lexus and MercedesBenz. The recently launched Q7 offroad luxury vehicle is a late bid to capitalise on the SUV boom. In Europe, the carmaker39。s designers have focused on this in the interior. They have devised a new wraparound instrument panel shape to replace the more functional design in existing models. They have expanded the vehicle39。 the floor is neoprene. The space between the rear seats can house a range of optional equipment: the show car featured an espresso coffee machine. Stora ge boxes and baby carriers are more realistic alternatives. To enhance practicality, the rear seats slide backwards and forwards diagonally to increase shoulder and legroom or rear load space. When the rear seats are in their most forward position, an obliquefacing child seat can be used behind the seats. Roadjet39。s Q5 and A4 models. To heighten the sense of luxury, the concept uses a costly 1,000W Bang amp。s speakers to pick up and amplify passengers39。 growing demand for power is having a negative effect on 外文資料 5 exhaust emissions and fuel consumption. Audi is looking at sophisticated technical solutions to balance the equation. Roadjet39。s overall fuel consumption is slightly lower than the current A4 Quattro valve train technology, due to enter production later in 2021,lets the engine perform economically and smoothly during normal driving, switching automatically to more responsive, more powerful cha
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