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    • 4. 发明授权
    • Fuel injection device
    • 燃油喷射装置
    • US6112721A
    • 2000-09-05
    • US66452
    • 1998-04-28
    • Susumu KouketsuHitoshi YokomuraKeiki Tanabe
    • Susumu KouketsuHitoshi YokomuraKeiki Tanabe
    • F02M45/00F02M45/12F02M47/02F02M63/02F02M33/04
    • F02M47/027F02M45/00F02M45/12F02M63/0225F02D2041/3881
    • A fuel injection system that can be used in a diesel engine is provided. The system includes a first accumulator for storing high-pressure fuel and a second accumulator for storing low-pressure fuel sufficiently lower in pressure than the fuel stored in the first accumulator. There is a first two-way electromagnetic valve disposed in a first fuel passage connecting the first accumulator with a fuel injection nozzle. A flow control apparatus controls a flow rate of fuel passing through a second fuel passage connecting a downstream side of the first two-way electromagnetic valve in the first fuel passage with the second accumulator. The flow control apparatus is placed in the second fuel passage. A second two-way electromagnetic valve is placed in a third fuel return passage which connects the fuel injection nozzle with a fuel tank. The second two-way electromagnetic valve switches the fuel injection modes of the fuel from its injection mode to its uninjection mode or vice versa. Also, there is provided a control device for controlling both the first two-way electromagnetic valve and the second two-way electromagnetic valve so that they open and close in response to operating conditions of the engine.
    • PCT No.PCT / JP97 / 02667 Sec。 371日期:1998年4月28日 102(e)1998年4月28日PCT PCT 1997年7月31日PCT公布。 公开号WO98 / 09068 1998年3月5日提供可用于柴油发动机的燃油喷射系统。 该系统包括用于存储高压燃料的第一蓄能器和用于存储压力低于储存在第一蓄能器中的燃料的低压燃料的第二蓄能器。 第一双向电磁阀设置在连接第一蓄能器和燃料喷嘴的第一燃料通道中。 流量控制装置控制通过连接第一燃料通道中的第一双向电磁阀的下游侧的第二燃料通道的燃料与第二蓄能器的流量。 流量控制装置被放置在第二燃料通道中。 第二双向电磁阀被放置在将燃料喷嘴与燃料箱连接的第三燃料返回通道中。 第二个双向电磁阀将燃料的燃料喷射模式从其喷射模式切换到其未喷射模式,反之亦然。 此外,还提供了一种用于控制第一双向电磁阀和第二双向电磁阀的控制装置,使得它们响应于发动机的操作条件而打开和关闭。