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Thảo luận trong 'Tiếng Anh chuyên ngành' bắt đầu bởi great_noble2251, 21/12/12.

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  1. great_noble2251

    Tài xế O-H
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    Tham gia ngày:
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    em nhờ các cụ phụ giúp em dịch doạn này:cụ thể là các cụm từ em bôi màu đỏ,ai biết nghĩa thì giúp em với!
    em cám ơn các cụ trứơc!
    The area of GDI injector design is currently one of rapid changes. These developments may be classified as those occurring in the basic atomization type, those occurring in injector packaging, and the most extensive area of change, which is continuous improvement in delivered injector performance. The types of GDI injectors now being developed include the pulse-pressurized, air-assisted unit and the outwardly opening, high-pressure, single-fluid injector. These designs complement the more common high pressure, single-fluid, inwardly opening, swirl-channel injector. Pulse-pressurized air-assisted injectors utilize significantly reduced fuel pressure of less than one megapascal, but require two separate solenoids and a source of compressed air. The design generally employs an outwardly opening poppet. The outwardly opening designs, whether air-assisted or single-fluid, have no sac-volume spray in the classic sense, which tends to yield a slightly improved overall mean drop size. However, it is generally agreed that it is more difficult to develop a portfolio of off-axis, angled sprays with. this constraint. The off-axis spray is one of the developments that address the packaging of injection systems. Component packaging in GDI design is a primary constraint, and the movement from a 12 mm to a 10 mm to an 8 mm injector mounting diameter is being driven by the need to enhance packaging options. The availability of injectors that deliver fuel sprays that are directed 10 °, 20 ° or 30 ° from the injector mounting axis can offer significant flexib

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