BMWより600ccバイクに匹敵する大型電動スクーターが登場!その一方、中国では電動バイクの法規制強化?

先日開催された「BMW Motorrad Innovation Day 2011」にて、BMW Motorradのコンセプトモデル電動スクーター「E-Scooter」が発表されました。

この未来志向の乗り物は、地方都市と市の中心部を結ぶコミューターとして考案されたそうです。

このコンセプトビークル「BMW E-Scooter」は、2人乗車時に高速道路を走行しても、最高速を持続させ、安全に追い越し走行ができる
としています。また、同乗者がいても、急な斜面での坂道発進も容易にこなせる能力があるとしています。

開発テストでは、重要となる0−60km/hの領域で、最高出力を出すことが可能だとしており、これは600ccのガソリンエンジンのスクーターに匹敵するとしています。

バッテリーの充電容量は、日常的な使用では100km以上の走行が可能です。このような、「BMW E-Scooter」コンセプトビークルは、都市と郊外への毎日の移動手段の一つとなりうるとして、長期的に見てゼロエミッションにも繋がり適切だとしています。

■「BMW E-Scooter」詳細 (BMWプレスリリースより)

Fast charging at conventional power sockets.

The E-Scooter concept vehicle`s battery is charged at regular household power sockets as found in Europe, the USA, Canada and Japan, so no special charging station is required. When the battery is completely flat, the charging period is less than three hours. However, practical experience has shown that the battery rarely runs out completely, so charging times are generally shorter.

Frame.

Unlike existing maxi scooters with combustion engines, the concept vehicle does not have a main frame. Instead, the aluminium battery casing ? which also contains the electronic system required for battery cell monitoring ?takes over the function of the frame. The steering head support is connected to it, as is the rear frame and the left-hand mounted single swing arm with directly hinged, horizontally installed shock absorber.

Electric machine, power electronics and charging device.

Due to its high output, the BMW Motorrad development study has no hub motor with direct drive or planetary gearbox. Instead, the high-performance electric machine is mounted behind the battery casing. The secondary drive consists of a toothed belt from the electric machine to the belt pulley mounted coaxially on the swinging fork pivot with drive pinion. From here, power transmission occurs via roller chain to the rear wheel. When the E-Scooter is decelerated in trailing throttle or when braking, the energy released is recuperated, thereby increasing the vehicle`s range by between 10 and 20 per cent depending on driving profile.

The electrical components required for the electric drive are installed on the top of the battery casing. The external battery electronics system permanently collects and monitors data such as the temperature and voltage of the battery cells, both during travel and while charging. The power electronics acts as a control system and controls the electric machine. The charging device includes a charge cable which allows the battery to be recharged at a conventional household power socket. In addition to the other components like an ISO insulation monitor, high-voltage indicator and a high-voltage distributor, a DC-DC converter is included. It is required to change high voltage to low voltage power to supply the 12 volt vehicle supply and especially for the control units.

Cooling system.

During travel, the electric machine and power electronics are liquid-cooled, as is the charging device during charging. An electric coolant pump ensures coolant circulation through the radiator. While a coolant is commonly used for the battery in electrically powered cars, the E-Scooter concept vehicle uses an air cooling system in order to save space.

Safety.

BMW Motorrad is one of the very few motorcycle manufacturers to be able to draw on its own experience and expertise in the automobile field in the development of electrically powered vehicles. Synergies are derived from the development of the BMW E-Scooter concept vehicle not just in the ready availability of technical components but also in the area of high voltage engineering and the associated safety requirements. Here for the first time, standards established by the leading automobile manufacturers relating to high voltage safety (> 60 volt) and functional reliability are being applied to a two-wheel vehicle with electric drive.

このような大型電動バイクが現れる一方、手軽な普段使いの乗り物として、電動バイクの普及が広まっている中国では、7月1日より一部の都市などで法規制が強化され、波紋をよんでいます。

→ 「電動自行車禁上路! 違規挨罰1200」(動画あり)− 華視新聞

→ 電動自転車、北京でようやく合法化− SankeiBiz

→ 深セン市内の大部分で6月6日から電動自転車の運転を禁止− エクスプロア深せん

まだまだ中国からの輸入モデルが主力の日本の電動バイク事情ですが、これからの日本の需要に見合った製品はどのようなものなのか、今後の日本での電動バイク普及モデルは、どの排気量にあたるサイズになっていくのか、注目していきたいと思います。

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