Znen
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Zhongneng Vehicle Group is a Chinese motorcycle manufacturer founded by Chen Huaneng in June 1988, in Taizhou, Zhejiang. It was not until 1996 that ZNEN manufactured its first petrol mopeds. After twe
The ZNEN Coral 125 scooter
Four-stroke engine
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A four-stroke engine is an internal combustion engine in which the piston completes four separate strokes while turning the crankshaft. A stroke refers to the full travel of the piston along the cylin
An Otto Engine from 1880s US Manufacture
This 2004 Toyota Prius hybrid has an Atkinson-cycle engine as the petrol-electric hybrid engine
Audi Diesel R15 at Le Mans