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General Electric Genesis (officially trademarked GENESIS〔(【引用サイトリンク】title=Earlier Locomotive Models )〕) is a series of passenger locomotives produced by GE Transportation Systems, a subsidiary of General Electric. Between 1992 and 2001, 321 units were built for Amtrak, Metro-North, and Via Rail. The Genesis series of locomotives was designed by General Electric in response to a specification published by Amtrak and ultimately selected over a competing design presented by GM EMD. The Genesis series are unique among current North American diesel-electric locomotives because of their low height. This height restriction allowed the locomotive to travel easily through low-profile tunnels in the Northeast Corridor. The Genesis series is lower than even the previous-generation F40PH by , and is the only Amtrak diesel locomotive that meets the clearance or loading gauge requirements on every Amtrak route. A majority of Amtrak's trains are powered by at least one Genesis unit. ==Technical design== The Genesis series is unique among recently manufactured North American passenger locomotives in that it uses a single, monocoque carbody design, thus making it lighter, more aerodynamic, and more fuel efficient than its predecessors (F40PH, F59PH, P30CH, P32-BWH). However, this makes it more costly and time-consuming to maintain and repair. Amtrak is installing bolt-on nose cones on its units for easy replacement in the event of a grade crossing collision with a vehicle. As an example of the improvements over the predecessor locomotives, the Genesis is 22% more fuel-efficient than the F40PH while producing 25% more horsepower. In addition, all Genesis locomotives have four-stroke engines instead of the two-stroke engines previously used in EMD counterparts. The Genesis unit is a fully computerized locomotive which automatically controls all on-board functions, thus producing high reliability while keeping the maintenance requirements low. For example, its computers can automatically reduce the power plant's output in the event that the locomotive is overheating, or suffering from low oil pressure, low water pressure, or reduced airflow into the intakes, thus making it still operable.〔 All Genesis engines can provide head-end power (HEP) to the train drawn from an alternator or inverter powered by the main engine at a maximum rating of , making each unit capable of providing HEP for up to 16 Superliner railcars. The P40DC and P42DC power plants can supply 60-hertz head-end power either from the HEP alternator with the engine speed-locked to 900 rpm (normal mode) or from the traction alternator with the engine speed-locked to 720 rpm (standby mode). In the latter case, traction power is unavailable. The P32AC-DM powerplant does not have to be locked at a certain rpm because it utilizes an HEP inverter, which allows the prime mover to run at 1047 rpm when providing both traction power and HEP, and to idle at 620 rpm (or notch three) while still providing HEP for lighting and air-conditioning when not providing traction power. The trucks of Genesis locomotives were made by Krupp Verkehrstechnik, which has since been absorbed by Siemens Mobility; the trucks on the newest Genesis locomotives carry the Siemens name. 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「GE Genesis」の詳細全文を読む スポンサード リンク
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