原文：http://tinyurl.com/27qq4mb "Silverstone tech- The story behind Red Bull wing and McLaren diffuser" 红牛翅膀的部分小弟不翻译了，专注於Blown diffuser的部分 两张麦队这一站失败的吹气屁股图片 http://tinyurl.com/27y8khb http://tinyurl.com/24s9b39 This weekend we have been at Silverstone, a classic track but one that has undergone a facelift for this season with new sections on the second half of the lap. 这一个周末我们来到了是英国站银石赛道， 一条经典，但後半段赛道经过『拉皮』的赛道 As usual there were plenty of interesting technical updates on the cars, with teams catching up on the trends of the season and adding either exhaust blown diffusers or drag reducing F Duct rear wings, or in the case of Williams, both. Following on from the rush of exhaust blown diffusers we saw coming onto the cars in Valencia, McLaren had been working towards Germany but fast tracked the update and brought theirs to Silverstone for testing in Friday practice. It was the main feature of a major upgrade package, along with a new front wing. 一如以往，这一站有许多有趣的升级套件出现， 各车队们都在努力追赶本赛季的技术潮流， 或者是吹气扩散器，或者是F-duct尾翼，像威廉士的话就是两个一起上 在欧洲站我们看到了一些车队匆忙装上的吹气扩散器升级， 麦拉仑本来计画到德国站才用上升级吹气扩散器的， 但他们提前在本站周五练习赛上就测试了吹气扩散器。 同时前鼻翼也有升级，但主要的焦点还是集中在吹气扩散器上。 The system means that the exhaust outlets need to be placed lower near the floor of the car and this causes some problems with overheating the rear suspension, if you are not careful. Red Bull pioneered the technology and has really maximised it. They blow the exhaust gas through a slot which energises the airflow through the diffuser. It is this slot which the Red Bull mechanics are so keen for people not to see when the car is on the grid. But this is a bit of a pointless exercise, as teams have photographers taking digital images of the cars as they drive down the pit lane! 这个系统要求排气管出口布置得更低更靠近赛车底板的位置，如果设计不够小心的话， 这会带来後悬吊过热的问题。 红牛是此项技术的先驱者，而且把这一设计的效用发挥到极致。 他们将排气管的废气通过一个slot（开孔？）吹出， 为扩散器的通过气流增加能量。 红牛的技师们在赛道上尽力的阻挡人们观察的这个slot的位置，但这当然是没用的， 因为各车队都有负责拍照的，专门在红牛的赛车通过维修站时不断的拍摄数位照片！ One of Red Bull’s secrets is a setting on the Renault engine for use on the final crucial lap in qualifying, whereby the ignition is retarded on the over-run, which maintains exhaust gas pressure even when the driver lifts off the throttle. This maintains the performance of the blown diffuser and keeps the downforce up when it’s most needed. It thus avoids the main problem of an exhaust blown diffuser whereby when a driver lifts off the throttle for a corner, the downforce goes missing when you most need it and the rear stability changes. 红牛的另一个秘密是雷诺引擎在排位赛关键的最後一圈时的设定。 在这个全力冲刺的设定下，引擎会处於一种延迟点火的特殊模式 （这段翻的真烂啊....有没有巷子内的版友可以翻的更好的？） 这样能在车手松油时维持排气管气压， 进而在最被需要的时候维持吹气扩散器的性能表现，亦即在最需要的时候维持下压力 这就避免了吹气扩散器最大的问题，就是车手在弯角中央松开油门时， 下压力会显着降低损失，而弯道中偏偏是你最需要下压力的时候。 （译按：这一站的周五FP两台麦拉仑的确一直在弯道时冲出去除草...） It’s not something you can do for more than a lap or two as the temperatures go sky high, which damages the engine, but it gives that vital fraction of a second which keeps Red Bull ahead of the rest in qualifying. 这不是能持续超过1圈或2圈的事情，因为引擎温度温度将会飙高而损坏引擎， 但这却可以给红牛在排位赛中多争取那零点几秒而抢到竿位 But one of the problems with running the exhausts low is that the components at the back of the car get very hot. McLaren’s lower wishbone featured a wide insulating cover to prevent overheating. The side sections of the diffuser featured an upper insulating plate, and underneath and they were painted with an insulating coating. But these precautions didn’t prevent the diffuser slightly changing shape due to the high temperatures, and this caused some rear end instability. So the diffuser was dropped for this weekend and McLaren had a rush on to balance the car with the new front wing but without the rear end package. Their performance in the race on Sunday was quite remarkable given how much work there was to do after Friday’s problems. 但另一个使用吹气扩散器的问题是这会让车屁股变得很烫。 麦拉仑极低的後悬挂吊下悬臂上有一整块绝缘材料以避免过热， 扩散器的外上方也多了一块绝缘板。 但这些多出来的这些预防措施都不能避免扩散器在高温下些微变形， 这导致了尾部的些许不稳定。 所以这组新的扩散器本周末被拆下了， 麦拉仑只能使用新鼻翼搭配旧车身，然後尝试设定新的平衡。 考虑到他们周五碰到的巨大问题，周日麦队的比赛速度真的已经很了不起了 ------------------------------------------------------------------ 大致就是这样 又多了一个解释为何红牛正赛中速度不如排位赛让人印象深刻的说法 也解释了为何排位赛中红牛的车可以杀弯杀得如此鬼哭神号 不过JA都知道了，相信其他车队也知道了吧XDD 对麦队来说可能比较不好的消息是 前面法拉利的『吹气屁股』提升方式是些微的提高了他们後悬吊装置的高度 进而避免了排气管直接对着後悬吊组件吹风 而麦拉仑的车...为了配合他们的超级扩散器...後悬吊组件原本就设计的极端的低 而且麦队的扩散器也比法拉利的极端 so如果要循同样的思维去硬改吹气扩散器的话，肯定会碰到比法拉利更多的问题 搞不好麦队原本依赖的超级扩散器都得为此做出妥协 这不，如前所述，作了一大堆的预防措施新扩散器还是给他烤软变形了..... 红牛的车反正从一开始就不是围绕着超级扩散器建造的 而是靠超卓的机械抓地力（纽维在麦队时，麦队车辆的机械抓地力也很优秀） 跟上半车身的空力设计产生下压力 吹气扩散器无疑是起到锦上添花的作用 但很清楚的是，即便这朵花在正赛中无法全力发挥，红牛也不是好欺的对手 其他从去年就双层扩散器个没完的车队，恐怕真的是想学红牛也有个限度 --

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