Fuel injection rate shaping control system
    5.
    发明授权
    Fuel injection rate shaping control system 失效
    燃油喷射率整形控制系统

    公开(公告)号:US5619969A

    公开(公告)日:1997-04-15

    申请号:US563344

    申请日:1995-11-28

    摘要: A fuel injection rate shaping control system is provided which effectively controls the flow rate of fuel injected into the combustion chamber of an engine to improve combustion and reduce emissions by controlling the rate of pressure increase during injection. The injection rate shaping control system includes a rate shaping control device including a rate shaping transfer passage having a predetermined length and diameter specifically designed to create a desired injection pressure rate shape. In other embodiments of the present invention, two or more rate shaping transfer passages capable of producing distinct rate shapes are packaged in various fuel injection systems to selectively provide various rate shapes depending on operating conditions. Switching valves, i.e., solenoid operated three-way valves, may be used to direct the fuel or timing fluid flow to any one of the rate shaping transfer passages. Also, a dampening means in the form of a reverse flow restrictor valve is positioned in the rate shaping transfer passage to dampen reflected pressure waves thereby minimizing the adverse effects thereof.

    摘要翻译: 提供一种燃料喷射率成形控制系统,其有效地控制喷射到发动机的燃烧室中的燃料的流量,以通过控制喷射期间的压力增加率来改善燃烧并减少排放。 喷射率成形控制系统包括速率成形控制装置,其包括具有预定长度和直径的速率整形传送通道,其特别设计成产生所需的喷射压力速率形状。 在本发明的其它实施例中,能够产生不同速率形状的两个或更多个速率成形传送通道被包装在各种燃料喷射系统中,以根据操作条件选择性地提供各种速率形状。 切换阀,即电磁操作的三通阀,可用于将燃料或正时流体流引导到速率整形传递通道中的任一个。 此外,反流限流阀形式的阻尼装置位于速率整形传递通道中以阻尼反射压力波,从而使其不利影响最小化。