公开(公告)号：US09157384B2

公开(公告)日：2015-10-13

申请号：US13741851

申请日：2013-01-15

Applicant: Caterpillar, Inc.

Inventor： Dana R. Coldren ,  Cory A. Brown

IPC: F02D19/06 ,  F02D19/08 ,  F02M43/04 ,  F02M47/02 ,  F02M45/08 ,  F02D19/10

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：US20140182552A1

公开(公告)日：2014-07-03

申请号：US13732673

申请日：2013-01-02

Applicant: CATERPILLAR INC.

Inventor： Cory A. Brown ,  Joshua W. Steffen ,  Dana R. Coldren ,  Alan R. Stockner ,  Hoisan Kim ,  Dianqi Fang

IPC: F02M69/50

CPC classification number: F02D19/10 ,  F02D41/22 ,  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. Over pressurization of the gaseous fuel side of the fuel system due to leaked liquid fuel is avoided by regularly injecting leaked liquid fuel, but not gaseous fuel, from the gaseous nozzle outlet set during the limp home mode of operation.

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。 由于泄漏的液体燃料，燃料系统的气体燃料侧的过度加压通过在跛行家庭操作模式期间从设置的气体喷嘴出口定期注入泄漏的液体燃料而不是气体燃料来避免。

公开(公告)号：US20140174402A1

公开(公告)日：2014-06-26

申请号：US13725161

申请日：2012-12-21

Applicant: CATERPILLAR INC.

Inventor： Joshua W. STEFFEN ,  Dana R. Coldren

IPC: F02M63/02

CPC classification number: F02D19/06 ,  B64C27/51 ,  F02D19/024 ,  F02D19/027 ,  F02M37/0041 ,  Y02T10/32 ,  Y02T10/36

Abstract: A dual fuel system for an engine is disclosed. The dual fuel system may have a first fuel supply providing a first fuel to the engine, and a second fuel supply providing a second fuel. The dual fuel system may also have a regulator configured to pass the second fuel from the second fuel supply to the engine, with the regulator also in fluid communication with the first fuel supply. The dual fuel system may further have a damper in fluid communication with the first fuel supply and an output of the regulator.

Abstract translation: 公开了一种用于发动机的双燃料系统。 双燃料系统可以具有向发动机提供第一燃料的第一燃料供应和提供第二燃料的第二燃料供应。 双燃料系统还可以具有调节器，其被配置为将第二燃料从第二燃料供应传递到发动机，调节器也与第一燃料供应流体连通。 双燃料系统还可以具有与第一燃料供应和调节器的输出流体连通的阻尼器。