The fuel cell engine was packaged into the cab by Lotus Engineering, which also designed control systems to optimise performance of the fuel cells and electric drive systems.

燃料电池引擎被莲花工程组装完成，同时也包含了控制优化系统和电动机。

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To comply with these regulations, automakers are being forced to develop ultra low-emission engine systems by optimizing combinations of technologies related to combustion, aftertreatment and fuel.

为了满足这些排放法规，汽车制造商不得不优化相关的燃烧、后处理和燃料等技术，从而开发超低排放发动机系统。

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There are many piping systems in the engine room, such as fuel oil system, cooling system, lubricating system, fire-fighting system. How do you identify them?

机舱中有许多管系，像燃油系统，冷却系统，滑油系统，消防系统，怎样识别它们？

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The turbos, smaller engine blocks and advanced fuel-management systems available on the Cruze and others may not be as sexy as lithium-ion batteries.

WSJ: Is Chevy's Cruze Dulling the Spark of its Volt?

Vehicles with fuel-saving six-speed transmissions or cylinder deactivation systems let a big V8 engine run on just four cylinders on the highway.

FORBES: Joann Muller On The Automotive Industry