公开(公告)号：US20140338639A1

公开(公告)日：2014-11-20

申请号：US14291657

申请日：2014-05-30

Applicant: Caterpillar Inc.

Inventor： Cory A. Brown

IPC: F02D19/06

CPC classification number: F02D19/0694 ,  F02D19/0642 ,  F02D41/0025 ,  F02D41/0027 ,  F02D41/3094 ,  F02D41/401 ,  F02D2200/0602 ,  F02M43/04 ,  F02M47/027 ,  F02M55/02 ,  F02M55/025 ,  Y02T10/36 ,  Y02T10/44

Abstract: A method of controlling injection rate shape of gaseous fuel in a dual fuel injector of an engine is disclosed. The dual fuel injector comprises a gaseous fuel needle check, a gaseous fuel control chamber, and a spring chamber. The method includes determination of an injection rate shape based on current operational characteristics of the engine. On the basis of the determined injection rate shape, liquid fuel pressure of the liquid fuel to be supplied to the gaseous fuel control chamber and the spring chamber is determined. The liquid fuel at the determined liquid fuel pressure, is delivered to the gaseous fuel control chamber and the spring chamber. The gaseous fuel needle check is lifted to inject the gaseous fuel based on the determined injection rate shape.

Abstract translation: 公开了一种在发动机的双燃料喷射器中控制气体燃料的喷射率形状的方法。 双燃料喷射器包括气体燃料针检查，气体燃料控制室和弹簧室。 该方法包括基于发动机的当前操作特性确定喷射率形状。 基于确定的喷射率形状，确定供给到气体燃料控制室的液体燃料的液体燃料压力和弹簧室。 在确定的液体燃料压力下的液体燃料被输送到气体燃料控制室和弹簧室。 气体燃料针检查被提升以基于确定的喷射速率形状喷射气态燃料。

公开(公告)号：US20140196687A1

公开(公告)日：2014-07-17

申请号：US13741851

申请日：2013-01-15

Applicant: CATERPILLAR, INC.

Inventor： Dana R. Coldren ,  Cory A. Brown

IPC: F02D19/06 ,  F02M43/04 ,  F02M47/02 ,  F02D19/08

CPC classification number: F02D19/0642 ,  F02D19/0694 ,  F02D19/08 ,  F02D19/10 ,  F02M43/04 ,  F02M45/086 ,  F02M47/027 ,  Y02T10/36

Abstract: A dual fuel engine utilizes a compression ignited pilot injection of liquid diesel fuel to ignite a mixture of gaseous fuel and air in each engine cylinder. The gaseous fuel is injected at a relatively low pressure directly into the engine cylinder from a fuel injector. The liquid diesel fuel is injected directly into the engine cylinder from the same fuel injector. In-cylinder dynamic gas blending during the compression stroke can reduce potential hydrocarbon slip that could occur when unburned fuel resides in crevice volumes within the engine cylinder.

Abstract translation: 双燃料发动机利用液化柴油燃料的压缩点火引燃喷射来点燃每个发动机气缸中的气体燃料和空气的混合物。 气体燃料以相对低的压力从燃料喷射器直接喷射到发动机气缸中。 液体柴油由相同的燃料喷射器直接注入发动机气缸。 在压缩冲程期间的缸内动态气体混合可以减少当未燃燃料位于发动机气缸内的缝隙体积时可能发生的潜在碳氢化合物滑移。

公开(公告)号：US20140165966A1

公开(公告)日：2014-06-19

申请号：US13718516

申请日：2012-12-18

Applicant: CATERPILLAR INC.

Inventor： Cory A. Brown ,  David T. Montgomery ,  Mark F. Sommars

IPC: F02M43/04

CPC classification number: F02M43/04 ,  F02M63/0042 ,  F02M63/0052 ,  Y10T137/0379 ,  Y10T137/7794

Abstract: A pressure regulator for use in an engine is disclosed. The pressure regulator may include first and second flow paths formed in a body, wherein the first flow path is configured to pass a first fluid and the second flow path is configured to receive a second fluid. A diaphragm may be disposed within the first flow path and the diaphragm may be configured to move based on a pressure differential between the first and second fluids. The pressure regulator may further include a seat associated with the first flow path. A primary valve element may be connected to the diaphragm and configured to selectively engage the seat when a pressure of the fluid in the first flow path exceeds a pressure of the fluid in the second flow path by a first threshold amount. Additionally, a secondary valve element may be connected to the diaphragm and configured to selectively engage the seat when the pressure of the fluid in the second flow path exceeds the pressure of the fluid in the first flow path by a second threshold amount.

Abstract translation: 公开了一种用于发动机的压力调节器。 压力调节器可以包括形成在主体中的第一和第二流动路径，其中第一流动路径被配置成通过第一流体，并且第二流动路径被配置成接收第二流体。 隔膜可以设置在第一流路内，并且隔膜可以构造成基于第一和第二流体之间的压差而移动。 压力调节器还可以包括与第一流动路径相关联的座椅。 主阀元件可以连接到隔膜并且构造成当第一流路中的流体的压力超过第二流动路径中的流体的压力第一阈值时，选择性地接合座。 此外，次级阀元件可以连接到隔膜并且构造成当第二流动路径中的流体的压力超过第一流动路径中的流体的压力第二阈值量时选择性地接合座椅。