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The Alexander Dennis Enviro500 (previously known as the TransBus Enviro500) is a three-axle double-decker bus built by Alexander Dennis (formerly by TransBus) in the United Kingdom. It was unveiled in 2002 and is one of the Enviro-series bus models made by TransBus/Alexander Dennis. A "New Generation" Enviro500 was launched in 2012, gradually replacing the original version. ==Original design== The Dennis chassis for Enviro500 (also known as Trident E500) was modified from the Trident 3. It can be fitted with Cummins ISMe335 Euro III engine (later Cummins ISLe340 Euro IV/Euro V engine which uses AdBlue to reduce emission of nitrogen oxides through selective catalytic reduction process), or ISM-330 engine for the buses delivered to North America, and coupled to Voith DIWA864.3E 4-speed or ZF 5HP602 5-speed gearbox. Later Voith DIWA864.5 4-speed gearbox, ZF 6HP602 6-speed gearbox and Allison B500R 6-speed gearbox became available and gradually became the standard configurations. Initially only the 12-metre (40 ft)-long version of the Enviro500 was built, but in 2007 Alexander Dennis announced the production of the 12.8-metre-long version,〔()〕 and an 11.3-metre-long variant followed in 2008. Later Alexander Dennis developed the hybrid electric version of Enviro500, known as the Enviro500H, with GM-Allison's parallel hybrid drive system; it was unveiled in late 2008.〔()〕〔()〕 The body of the Enviro500 was based on the original style of the single-deck Enviro300, and the upper-deck frontal design was similar to the design used on the Plaxton President body. The vehicle exceeded some design limitations in Hong Kong, prompting the local Transport Department to make some exclusions in order to make the buses available to KMB on time. * The width of the bus is 2.55 metres exceeded the limit of 2.50 metres. The width of 2.55 metres approved by the European Union, became the current standard. * A fixed glass replaced the emergency door at the rear of the upper deck, but with more hammers available for emergency. * The front indicators are the smallest of all current models of Kowloon Motor Bus. The facelifted version of Enviro500 body, first built in late 2003, have revised frontal and rear designs. This version of Enviro500 bodywork was also available with Volvo B9TL chassis. In 2011, Alexander Dennis unveiled the restyled Enviro500 for North American market, which had the same front with the Enviro400. At the same time, a "Go-Anywhere" version of Enviro500 with an overall height of 4.1 metres (13 ft 6 in) also became available. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Alexander Dennis Enviro500」の詳細全文を読む スポンサード リンク
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