公开(公告)号：US09181830B2

公开(公告)日：2015-11-10

申请号：US13712254

申请日：2012-12-12

Applicant: Caterpillar Inc.

Inventor： Ronald Silver ,  Scott B. Fiveland ,  D. Ryan Williams

IPC: F01N3/10 ,  F02B17/00 ,  F02D13/02 ,  F02B75/02 ,  F02D41/02 ,  F01N3/08 ,  F01N3/20 ,  F02M25/07 ,  F02M23/00

CPC classification number: F01N3/10 ,  F01N3/0814 ,  F01N3/0842 ,  F01N3/2066 ,  F02B75/021 ,  F02B2275/14 ,  F02D13/0273 ,  F02D41/0275 ,  F02M26/05 ,  F02M26/06 ,  F02M26/23 ,  F02M2023/008 ,  Y02T10/123 ,  Y02T10/18 ,  Y02T10/24

Abstract: An internal combustion engine operates on a six-stroke combustion cycle including a first compression stroke, a first power stroke, a second compression stroke, and a second power stroke. A first fuel charge is introduced to a combustion chamber of the engine at a first fuel rate during the first compression and/or first power stroke to produce lean exhaust gasses. A second fuel charge is also introduced to the combustion chamber during the second compression and/or second power stroke to normally produce lean exhaust gasses. Periodically, the second fuel charge can be increased to a second fuel rate to produce stoichiometric rich exhaust gasses. A lean nitrogen oxide trap can be disposed in an exhaust system associated with the engine to temporarily trap nitrogen oxides. Once saturated, the LNT can be periodically regenerated by production of the rich exhaust gasses.

Abstract translation: 内燃机在包括第一压缩冲程，第一动力冲程，第二压缩冲程和第二动力冲程的六冲程燃烧循环中操作。 在第一压缩和/或第一动力冲程期间以第一燃料速率将第一燃料装料引入发动机的燃烧室以产生贫废气。 在第二压缩和/或第二功率冲程期间，第二燃料装料也被引入燃烧室，以正常地产生贫排气。 周期性地，第二燃料充量可以增加到第二燃料速率以产生化学计量的富排气。 贫氮氧化物捕集器可以设置在与发动机相关联的排气系统中以暂时捕获氮氧化物。 一旦饱和，可以通过生产富排气来定期再生LNT。

公开(公告)号：US08978603B2

公开(公告)日：2015-03-17

申请号：US13712285

申请日：2012-12-12

Applicant: Caterpillar Inc.

Inventor： D. Ryan Williams ,  Scott B. Fiveland

IPC: F02B75/02

CPC classification number: F02B75/021 ,  F01L1/38 ,  F02D13/0276 ,  F02M26/05 ,  F02M26/20 ,  F02M26/37

Abstract: An engine combustion cylinder is fluidly connectable to an intake system through an intake valve and to an exhaust system through an exhaust valve. A valve activation system is to activate the intake valve and the exhaust valve. The valve activation system is responsive to a controller providing command signals to the valve activation system such that, when the engine operates in a six-stroke combustion cycle, the intake valve is opened during a recompression stroke to allow a portion of the products from the first combustion stroke to exit the combustion cylinder and enter into the intake system.

Abstract translation: 发动机燃烧气缸通过进气门和排气系统通过排气阀可流体地连接到进气系统。 阀门启动系统是激活进气门和排气阀。 阀启动系统响应于向阀启动系统提供命令信号的控制器，使得当发动机在六冲程燃烧循环中操作时，进气阀在再压缩冲程期间打开以允许一部分产品从 第一次燃烧行程离开燃烧缸并进入进气系统。

公开(公告)号：US08978602B2

公开(公告)日：2015-03-17

申请号：US13711776

申请日：2012-12-12

Applicant: Caterpillar Inc.

Inventor： D. Ryan Williams ,  Scott B. Fiveland

IPC: F02M25/07 ,  F02B75/02 ,  F02D13/02 ,  F02D41/00

CPC classification number: F02B75/021 ,  F02D13/0203 ,  F02D13/0269 ,  F02D13/0273 ,  F02D41/0002 ,  F02D41/005 ,  F02D2041/001 ,  F02M26/05 ,  F02M26/06 ,  Y02T10/142 ,  Y02T10/18 ,  Y02T10/42 ,  Y02T10/47

Abstract: An engine combustion cylinder is fluidly connectable to an intake system through an intake valve and to an exhaust system through an exhaust valve. A valve activation system is to activate the intake valve and the exhaust valve. The valve activation system is responsive to a controller providing command signals to the valve activation system such that, when the engine operates in a six-stroke combustion cycle, the intake valve is opened during a recompression stroke to allow a portion of the products from the first combustion stroke to exit the combustion cylinder and enter into the intake system. This may be done to match the power densities of the first and second power strokes of the piston.

Abstract translation: 发动机燃烧气缸通过进气门和排气系统通过排气阀可流体地连接到进气系统。 阀门启动系统是激活进气门和排气阀。 阀启动系统响应于向阀启动系统提供命令信号的控制器，使得当发动机在六冲程燃烧循环中操作时，进气阀在再压缩冲程期间打开以允许一部分产品从 第一次燃烧行程离开燃烧缸并进入进气系统。 这可以进行以匹配活塞的第一和第二功率冲程的功率密度。

公开(公告)号：US20140158072A1

公开(公告)日：2014-06-12

申请号：US13712285

申请日：2012-12-12

Applicant: CATERPILLAR INC.

Inventor： D. Ryan Williams ,  Scott B. Fiveland

IPC: F02B75/02

CPC classification number: F02B75/021 ,  F01L1/38 ,  F02D13/0276 ,  F02M26/05 ,  F02M26/20 ,  F02M26/37

Abstract: An engine combustion cylinder is fluidly connectable to an intake system through an intake valve and to an exhaust system through an exhaust valve. A valve activation system is to activate the intake valve and the exhaust valve. The valve activation system is responsive to a controller providing command signals to the valve activation system such that, when the engine operates in a six-stroke combustion cycle, the intake valve is opened during a recompression stroke to allow a portion of the products from the first combustion stroke to exit the combustion cylinder and enter into the intake system.

Abstract translation: 发动机燃烧气缸通过进气门和排气系统通过排气阀可流体地连接到进气系统。 阀门启动系统是激活进气门和排气阀。 阀启动系统响应于向阀启动系统提供命令信号的控制器，使得当发动机在六冲程燃烧循环中操作时，进气阀在再压缩冲程期间打开以允许一部分产品从 第一次燃烧行程离开燃烧缸并进入进气系统。

公开(公告)号：US20140158068A1

公开(公告)日：2014-06-12

申请号：US13711743

申请日：2012-12-12

Applicant: CATERPILLAR INC.

Inventor： D. Ryan Williams ,  Scott B. Fiveland

IPC: F02B75/02

CPC classification number: F02B75/021 ,  F02B3/06

Abstract: A six-stroke engine system including an engine with a combustion chamber including an exhaust valve that expels exhaust gasses and a blowdown exhaust valve that expels blowdown exhaust gasses during recompression. An exhaust line communicates with the engine to direct exhaust gasses out of the combustion chamber, and a blowdown exhaust line communicates with the engine to direct blowdown exhaust gasses out of the combustion chamber and into the exhaust line. The blowdown exhaust gasses are expelled through the blowdown exhaust valve during the recompression stroke, and the exhaust gasses are expelled through the exhaust valve during the exhaust stroke.

Abstract translation: 一种六冲程发动机系统，其包括具有燃烧室的发动机，该燃烧室包括排出废气的排气阀，以及在再压缩期间排出排气废气的排污排气阀。 排气管路与发动机连通，将废气排出燃烧室，排污管线与发动机连通，将废气排放出燃烧室并进入排气管路。 在再压缩冲程期间，排气排气通过排放排气阀排出，并且在排气冲程期间废气通过排气阀排出。