公开(公告)号：US20140188372A1

公开(公告)日：2014-07-03

申请号：US13732619

申请日：2013-01-02

Applicant: CATERPILLAR INC.

Inventor： Daniel Puckett ,  Steven Thomas Grant ,  Frank Lombardi

IPC: F02D19/06

CPC classification number: F02D19/0615 ,  F02D19/061 ,  F02D19/0623 ,  F02D19/0684 ,  F02D19/0694 ,  F02D19/105 ,  F02M21/0281 ,  F02M63/0063 ,  F02M63/029 ,  Y02T10/32 ,  Y02T10/36

Abstract: A dual fuel common rail system may be operated in a regular mode in which a relatively large charge of gaseous fuel is ignited by compression igniting a relatively small injection quantity of liquid diesel fuel. The dual fuel system may be operated in a single fuel limp home mode in which liquid diesel fuel is injected at higher pressures. When transitioning from the single fuel limp home mode to the dual fuel regular mode, accumulated leaked liquid fuel in the gaseous nozzle chamber of each fuel injector is purged and burned in the respective engine cylinder.

Abstract translation: 双燃料共轨系统可以以常规模式操作，其中相对较大量的气体燃料通过压缩点燃，点燃相对较小量的液体柴油燃料。 双燃料系统可以在单一燃料跛行家庭模式中操作，其中液体柴油燃料在较高压力下喷射。 当从单一燃料跛行家庭模式转换到双重燃料正常模式时，每个燃料喷射器的气体喷嘴室中累积的泄漏的液体燃料在相应的发动机气缸中被清除和燃烧。

公开(公告)号：US09518518B2

公开(公告)日：2016-12-13

申请号：US13866303

申请日：2013-04-19

Applicant: Caterpillar, Inc.

Inventor： Dana R. Coldren ,  Steven Thomas Grant ,  Frank Lombardi ,  Daniel R. Puckett

IPC: F02D19/06 ,  F02D41/32 ,  F02D41/00 ,  F02D19/10 ,  F02D41/38 ,  F02D41/40

CPC classification number: F02D41/0025 ,  F02D19/0605 ,  F02D19/061 ,  F02D19/0694 ,  F02D19/10 ,  F02D41/0027 ,  F02D41/3836 ,  F02D41/3845 ,  F02D41/403 ,  F02D2041/3881 ,  F02D2200/0602

Abstract: A compression ignition engine is fueled from common rail fuel injectors that predominately inject natural gas fuel that is compression ignited with a small pilot injection of liquid diesel fuel. Before and after a rapid load loss transient, the liquid and gaseous rail pressures are controlled toward respective pressures based upon engine speed and load. During the transient, the liquid rail pressure is controlled relative to the gas rail pressure in order to maintain the liquid rail pressure greater than the gas pressure during the transient to avoid migration gaseous fuel into the liquid fuel side of the system.

Abstract translation: 压燃式发动机由共轨燃油喷射器燃料，其主要喷射天然气燃料，该天然气燃料通过小型先导式液体柴油燃料喷射被压缩点燃。 在快速负载损耗瞬变之前和之后，基于发动机转速和负载，将液体和气体轨道压力控制到相应的压力。 在瞬态期间，相对于气体轨道压力控制液体轨道压力，以便在瞬态期间保持液体轨道压力大于气体压力，以避免气态燃料进入系统的液体燃料侧。

公开(公告)号：US08909457B2

公开(公告)日：2014-12-09

申请号：US13732619

申请日：2013-01-02

Applicant: Caterpillar Inc.

Inventor： Daniel Puckett ,  Steven Thomas Grant ,  Frank Lombardi

IPC: F02D19/10 ,  F02D19/06

CPC classification number: F02D19/0615 ,  F02D19/061 ,  F02D19/0623 ,  F02D19/0684 ,  F02D19/0694 ,  F02D19/105 ,  F02M21/0281 ,  F02M63/0063 ,  F02M63/029 ,  Y02T10/32 ,  Y02T10/36

Abstract: A dual fuel common rail system may be operated in a regular mode in which a relatively large charge of gaseous fuel is ignited by compression igniting a relatively small injection quantity of liquid diesel fuel. The dual fuel system may be operated in a single fuel limp home mode in which liquid diesel fuel is injected at higher pressures. When transitioning from the single fuel limp home mode to the dual fuel regular mode, accumulated leaked liquid fuel in the gaseous nozzle chamber of each fuel injector is purged and burned in the respective engine cylinder.

Abstract translation: 双燃料共轨系统可以以常规模式操作，其中相对较大量的气体燃料通过压缩点燃，点燃相对较小量的液体柴油燃料。 双燃料系统可以在单一燃料跛行家庭模式中操作，其中液体柴油燃料在较高压力下喷射。 当从单一燃料跛行家庭模式转换到双重燃料正常模式时，每个燃料喷射器的气体喷嘴室中累积的泄漏的液体燃料在相应的发动机气缸中被清除和燃烧。