原文:
The joint development called UniAir will make its debut on Fiat's
Alfa MiTo 1.4 MultiAir. It will deliver improvements to start-up,
part load and acceleration behaviour of a vehicle. UniAir is a cam-actuated,
electro-hydraulic valve train system. The fully variable valve
control can be used for both petrol and diesel engines and is
supplied via the existing engine oil circulation system. For petrol
engines, UniAir enables throttle-free, continuously variable,
software-based load control across the entire engine map. With
diesel engines, regulation of the temperature of the combustion
chamber is achieved due to the precise control of exhaust gas
recirculation rates. At the same time, the effective compression
ratio in the cylinder can be varied and a homogeneous combustion
ensured. It is hoped that the technology will allow car
manufacturers to downsize the engine size. Fiat uses UniAir in its
four-cylinder FIRE series of engines and in its small volume two
cylinder engines that are currently being developed. UniAir allows
variations in the valve stroke, and also in the opening and closing
of valves several times during one cycle, at different points in
time. Therefore, the system significantly expands
the potential of traditional valve train mechanisms.
原文来自:http://www.eurekamagazine.co.uk/article/20868/Fully-variable-hydraulic-valve-control-system-cuts-CO2-emissions.aspx
A collaborative development between Schaeffler and Fiat
Powertrain has resulted in the development of a fully variable
hydraulic valve control system for use on car engines. The
transmission reduces vehicle fuel consumption by up to 25%.;是由
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以下是参考译文:
译文:阀门控制软件
UniAir是一个凸轮驱动,电液气门驱动系统。全可变气门控制系统可用于汽油及柴油发动机,是通过现有的发动机油流通体制提供。对于汽油发动机,UniAir使油门,无连续可变的,基于软件的负载在整个引擎的地图控制。
希望该技术将允许汽车制造商缩减引擎的大小。菲亚特在它的四UniAir缸发动机消防系列并在其体积小2缸发动机目前正在发展。
迈克尔哈斯,主任先进的工程和商业舍弗勒集团汽车的引擎系统的发展,说:“在xx可变气门控制系统的开发,生产标准已涉及机械,液压和阀门控制软件领域的复杂的努力。”
UniAir允许在不同的阀门中风的变化,并在开幕式和闭幕式的阀门也多次在一个时间周期。因此,该系统大大扩展了传统的气门驱动机制的潜力。
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