公开(公告)号：US20090314860A1

公开(公告)日：2009-12-24

申请号：US12214623

申请日：2008-06-20

Applicant: Lifeng Wang ,  Koti R. Padarthy ,  Gengxun K. Gurley ,  Kyle E. Enzinger

Inventor： Lifeng Wang ,  Koti R. Padarthy ,  Gengxun K. Gurley ,  Kyle E. Enzinger

IPC: B05B1/30

CPC classification number: F02M47/027 ,  F02M45/08

Abstract: A mechanically actuated electronically controlled fuel injector (MEUI) includes a first electrical actuator that controls the position of a spill valve, and a second electrical actuator to control pressure on a closing hydraulic surface associated with a directly operated nozzle check valve. The fuel injector is actuated via rotation of a cam to move a plunger to displace fuel from a fuel pumping chamber either to a spill passage, or at high pressure out of a nozzle outlet of the fuel injector for an injection event. The minimum controllable fuel injection quantity, especially as it relates to small closely coupled post injections following a large main injection, is accomplished by the inclusion of a Z orifice passage that maintains a fluid connection between a needle control chamber and the nozzle supply passage. The inclusion of the Z orifice passage slows the rate at which pressure drops in the needle control chamber to commence an injection event, but also hastens the rate at which pressure builds in the needle control chamber to end an injection event. The result is a smaller post injection quantity and, if desired, a longer, shorter or same dwell time between injection events.

Abstract translation: 机械致动的电控燃料喷射器（MEUI）包括控制溢流阀的位置的第一电致动器和用于控制与直接操作的喷嘴止回阀相关联的关闭液压表面上的压力的第二电致动器。 燃料喷射器通过凸轮的旋转被致动以移动柱塞以将燃料从燃料泵送室移动到溢流通道，或者在高压下从用于喷射事件的燃料喷射器的喷嘴出口移出。 最小可控燃料喷射量，特别是与大型主喷射之后的小的紧密连接的后喷射相关的是通过包括保持针控制室和喷嘴供应通道之间的流体连接的Z孔通道来实现的。 Z孔通道的包含减慢了针控制室中的压力下降的速度，以开始注射事件，而且加快了针控制室中的压力建立以终止注射事件的速率。 结果是较小的后喷射量，并且如果需要，喷射事件之间的更长，更短或相同的停留时间。

公开(公告)号：US07950593B2

公开(公告)日：2011-05-31

申请号：US12214623

申请日：2008-06-20

Applicant: Lifeng Wang ,  Koti R. Padarthy ,  Gengxun K. Gurley ,  Kyle E. Enzinger

Inventor： Lifeng Wang ,  Koti R. Padarthy ,  Gengxun K. Gurley ,  Kyle E. Enzinger

IPC: F02D1/06

CPC classification number: F02M47/027 ,  F02M45/08

Abstract: A mechanically actuated electronically controlled fuel injector (MEUI) includes a first electrical actuator that controls the position of a spill valve, and a second electrical actuator to control pressure on a closing hydraulic surface associated with a directly operated nozzle check valve. The fuel injector is actuated via rotation of a cam to move a plunger to displace fuel from a fuel pumping chamber either to a spill passage, or at high pressure out of a nozzle outlet of the fuel injector for an injection event. The minimum controllable fuel injection quantity, especially as it relates to small closely coupled post injections following a large main injection, is accomplished by the inclusion of a Z orifice passage that maintains a fluid connection between a needle control chamber and the nozzle supply passage. The inclusion of the Z orifice passage slows the rate at which pressure drops in the needle control chamber to commence an injection event, but also hastens the rate at which pressure builds in the needle control chamber to end an injection event. The result is a smaller post injection quantity and, if desired, a longer, shorter or same dwell time between injection events.

Abstract translation: 机械致动的电控燃料喷射器（MEUI）包括控制溢流阀的位置的第一电致动器和用于控制与直接操作的喷嘴止回阀相关联的关闭液压表面上的压力的第二电致动器。 燃料喷射器通过凸轮的旋转被致动以移动柱塞以将燃料从燃料泵送室移动到溢流通道，或者在高压下从用于喷射事件的燃料喷射器的喷嘴出口移出。 最小可控燃料喷射量，特别是与大型主喷射之后的小的紧密连接的后喷射相关的是通过包括保持针控制室和喷嘴供应通道之间的流体连接的Z孔通道来实现的。 Z孔通道的包含减慢了针控制室中的压力下降的速度，以开始注射事件，而且加快了针控制室中的压力建立以终止注射事件的速率。 结果是较小的后喷射量，并且如果需要，喷射事件之间的更长，更短或相同的停留时间。

公开(公告)号：US20100096473A1

公开(公告)日：2010-04-22

申请号：US12288422

申请日：2008-10-20

Applicant: Dana R. Coldren ,  Koti R. Padarthy ,  Michael E. Sattler ,  Victor I. Yacoub

Inventor： Dana R. Coldren ,  Koti R. Padarthy ,  Michael E. Sattler ,  Victor I. Yacoub

IPC: F02M47/02

CPC classification number: F02M57/023 ,  F02M45/08 ,  F02M47/027 ,  F02M63/0019 ,  F02M63/0029 ,  F02M63/0035 ,  F02M63/0063 ,  F02M2200/28

Abstract: A mechanically actuated electronically controlled fuel injector (MEUI) includes a first electrical actuator that controls the position of a spill valve, and a second electrical actuator to control pressure on a closing hydraulic surface associated with a directly operated needle valve. The fuel injector is actuated via rotation of a cam to move a plunger to displace fuel from a fuel pumping chamber either to a spill passage, or at high pressure out of a nozzle outlet of the fuel injector for an injection event. The minimum controllable fuel injection quantity, especially as it relates to small closely coupled post injections following a large main injection, is accomplished by the inclusion of a variable flow rate valve that restricts fluid flow from a needle control chamber toward a drain, but is relatively unrestricted to high pressure fluid flow toward the needle control chamber. The inclusion of the variable flow rate valve slows the rate at which pressure drops in the needle control chamber to commence an injection event, but permits a fast rate at which pressure may build in the needle control chamber to end an injection event. The result is a smaller post injection quantity and more controllability over the dwell time between injection events.

Abstract translation: 机械致动的电控燃料喷射器（MEUI）包括控制溢流阀的位置的第一电致动器和用于控制与直接操作的针阀相关联的关闭液压表面上的压力的第二电致动器。 燃料喷射器通过凸轮的旋转被致动以移动柱塞以将燃料从燃料泵送室移动到溢流通道，或者在高压下从用于喷射事件的燃料喷射器的喷嘴出口移出。 最小可控燃料喷射量，特别是与大型主喷射之后的小型紧密连接的后喷射相关的最小可控燃料喷射量是通过包括限制流体从针控制室流向排水管的可变流量阀来实现的，但是相对 不受高压流体流向针控制室的限制。 包含可变流量阀减慢了针控制室中的压力下降的速率，以开始注射事件，但允许在针控制室中可能产生压力以结束注射事件的快速速率。 结果是在喷射事件之间的停留时间后更小的后喷射量和更高的可控性。