Citroen's C5 Airscape concept, which was shown at the 2007 Frankfurt Motor Show, reveals the French carmaker's design thinking for its next executive cabriolet.
While it does have a history of building folding hardtops,this concept is the first sign that Citroen is re-establishing itself in this niche market.
The carbon-fibre roof,while one of the most interesting pieces of engineering on the car,sits alongside some other innovative technologies,including Snow Motion-a traction control system that provides a level of traction close to that of a four-wheel drive.
Other innovative technologies include Citroen's Urban Hybrid unit prevents noise and vibration when the engine stops and boosts engine torque when the same time,it is environmentally friendly.
The profile of C5 Airscape reflects Citroen's efforts to achieve optimal aerodynamic design. The roof line, particularly large windows, and tapering chrome-plated door handles underline the flowing lines of the body. The high waistline, the clearly marked wheel arches and 19-inch wheels all reveal the company's attempt to define the concept as a vehicle of status.
The design of the folding roof is of particular glazed upper part lets light flood into the cabin and , while this will not be carried through to production , the roof is made entirely of folds away automatically , without assistance, and without the driver having to open the upper part of the roof storage area in the boot . The roof is designed with a metal-look exterior and a textile lining to resemble a roof made of cancas from the imterior. This is in an attempt to combat the modern problem of ensuring the design of the emtire vehivle flows when viewed on the road whilst also having the fabric look roof that buyers of executive cabriolets still desire.
Under the bonnet,the 208bhp 2.7-litre V6 HDi diesel engine is coupled with a particulate filter and is able to run on bio-diesel. When taken with the Snow Motion traction control system and CO2 emissions , the concept boasts high levels of performance while also being environmentally sound.
With its reversible alternator-starter and super-capacitors able to temporarilly store large amounts of energy,the UrbanHybrid system delivers real benefits in terms of environmental protection, driving pleasure, acoustic comfort and vibration control.
In Drive mode , when this voncept vehicle is travelling at under 6kph and the driver's foot is on the brake pedal , the engine cuts out . For maximum drivealility, it starts again instantly and automatically as soon as the driver releases the brake pedal. When the car is at a standstill, fuel consumption is zero and CO2 emissions are around 24g over a combined cycle.
Further, the onboard network (air conditioning , radio , etc.) is powered by energy recovered during the deceleration and braking phases. This brings savings in fuel consumption and eliminates additional pollutant emissions.
Engine torque can be temporarily boosted , when overtaking for example , for a high-speed take-off.
When the car is at a standstill , the UrbanHybrid system prevents noise and vibration in the cabin , for the comfort of both passengers and passers-by.
The executive positioning of C5 Airscape is reflected by the presence of the engine and particulate filter.
参考译文：
雪铁龙公司的“C5鸟瞰”概念车，在2007年法兰克福汽车展上亮相，展示了法国汽车制造商下一代的敞篷车的设计思想。
同时，它也拥有制造可折叠硬顶汽车的历史，这款概念车是雪铁龙公司恢复参与这个利基市场的第一个标志。
碳纤维车顶，是车上最吸引人的一项工程之一，供其依傍一些其他创新技术，包括“冰雪运动”——一种牵引力控制系统，能提供一定程度的接近四轮驱动的牵引。
其他创新技术包括雪铁龙的“城市混合动力”系统。可以这个单元防止当引擎停止时的噪音和振动，需要时可以快速增强发动机转矩。同时，它很环保。
“C5鸟瞰”的轮廓反映了雪铁龙公司为达到最佳的空气动力学设计做的努力。车顶的线条，尤其是大窗，和尖细的镀铬门把手突出了车体的流线。高高的腰身，清晰的标有记号的轮拱和19英寸的车轮都展示了该公司对确定这款概念车作为交通工具所做的努力。
可折叠的车顶的设计特别令人感兴趣。光滑的上部让亮晶晶的水流进舱内，但这将不会携带到产品中。车顶完全是由碳组成。它自动折叠起来，而不需要任何帮助，也不需要司机去打开存储在行李箱中的车顶上部。车顶设计成金属光泽外观和纺织物里层，从里面看，像帆布做成的车顶。这是解决当前问题的一次努力尝试，确保当汽车在路上被人们看到时，拥有整车流线设计，同时，在里面看得时候拥有一个看起来像纺织物的车顶，这是敞篷汽车顾客一直的要求。
在车罩下面，208匹马力、2.7升排量的V6高压共轨直喷柴油发动机（HDI）连接着一个微粒过滤器，并且能够使用生物柴油。为了低的燃料消耗率和二氧化碳排放量，当采取“冰雪运动”牵引力控制系统和“城市混合动力”系统提供了实实在在的利益，在环保，驾驶乐趣，噪声舒适性和振动控制等多个方面。
在驱动模式上，当这款概念在行驶每小时6小时以下的速度或者当司机的脚放在刹车踏板时，它能够瞬时地自动启动。当汽车处于停顿状态，燃料消耗是零，一个组合循环的二氧化碳排放量大约是24克。
此外，车载网络（空调，收音机等），则使用减速、制动时回收的能量，这样能够节省燃料和消除额外污染物的排放量。
发动机转矩可以瞬时的加大，以超车为例，一路高速腾飞。
当汽车处于停顿状态，“城市混合动力“系统防止舱内的噪音和振动，给乘客和路人舒适的感受。
”C5鸟瞰“的执行配置命令由工作中的发动机和微粒过滤器反馈。
（转载）
