公开(公告)号：US20180038269A1

公开(公告)日：2018-02-08

申请号：US15229821

申请日：2016-08-05

Applicant: Caterpillar Inc.

Inventor： Martin Willi ,  Charlie Kim

IPC: F02B19/10 ,  F02P13/00 ,  F02D41/30 ,  F02B19/18

CPC classification number: F02B19/1004 ,  F02B19/1023 ,  F02B19/12 ,  F02B19/18 ,  F02D41/3005 ,  F02P13/00

Abstract: A sparkplug assembly having a prechamber volume is operatively associated with the combustion chamber of an internal combustion engine such that the prechamber volume is in fluid communication with the combustion chamber. To purge exhaust gasses from the prechamber volume prior to ignition, the sparkplug assembly is operatively associated with a high-pressure air/fuel source that directs a pressurized air/fuel purge charge to the prechamber volume. The pressurized air/fuel purge charge may be at stoichiometric conditions. The high-pressure air/fuel source is configured to direct the pressurized air/fuel purge charge during at least a portion of the compression stroke to maintain a largely stoichiometric mixture of air and fuel in the prechamber volume.

公开(公告)号：US20160348570A1

公开(公告)日：2016-12-01

申请号：US14721616

申请日：2015-05-26

Applicant: CATERPILLAR INC.

Inventor： Martin Willi

IPC: F02B19/18 ,  F02B19/12

CPC classification number: F02B19/18 ,  F02B19/108 ,  F02B19/12 ,  F02M21/0215 ,  F02M53/043 ,  Y02T10/125 ,  Y02T10/32

Abstract: A nozzle for a prechamber assembly of an engine includes a hollow nozzle body which includes an outer surface, an inner surface, and an orifice surface. The outer surface defines an outer orifice opening and a coolant passage inlet opening. The inner surface defines an interior chamber and an inner orifice opening. The orifice surface defines an orifice passage extending between, and in communication with, the outer orifice opening and the inner orifice opening. The orifice passage is in communication with the interior chamber via the inner orifice opening. The orifice surface defines a coolant passage outlet opening which is in communication with the orifice passage. The nozzle body includes a coolant surface which defines a coolant passage within the nozzle body. The coolant passage extends between the coolant passage inlet opening and the coolant passage outlet opening and is in communication with the orifice passage.

Abstract translation: 用于发动机的前室组件的喷嘴包括中空喷嘴体，其包括外表面，内表面和孔表面。 外表面限定外孔口和冷却剂通道入口。 内表面限定内腔和内孔口。 孔表面限定了在外孔口和内孔口之间延伸并与其连通的孔口通道。 孔口通道经由内孔开口与内室连通。 孔表面限定了与孔通道连通的冷却剂通道出口开口。 喷嘴体包括限定喷嘴体内的冷却剂通道的冷却剂表面。 冷却剂通道在冷却剂通道入口和冷却剂通道出口之间延伸并与孔通道连通。

公开(公告)号：US09169794B2

公开(公告)日：2015-10-27

申请号：US13709486

申请日：2012-12-10

Applicant: Caterpillar Inc.

Inventor： Christopher R. Gehrke ,  Martin Willi

IPC: F02M25/07 ,  F02D41/30 ,  F02D19/10 ,  F02D41/40 ,  F02D41/00

CPC classification number: F02D41/30 ,  F02D19/0692 ,  F02D19/10 ,  F02D41/0025 ,  F02D41/0027 ,  F02D41/0055 ,  F02D41/3094 ,  F02D41/403 ,  F02D2041/0067 ,  F02M26/05 ,  F02M26/25 ,  F02M26/28 ,  F02M26/33 ,  F02M26/47 ,  Y02T10/36 ,  Y02T10/44 ,  Y02T10/47

Abstract: Systems and methods for operating an engine include controlling a temperature of recirculated exhaust gas to achieve a predetermined recirculated exhaust gas temperature. A mixture of air and temperature-controlled recirculated exhaust gas are admitted in a combustion chamber and a gaseous fuel injector delivers gaseous fuel during an intake stroke. A diesel fuel injector is activated for a first time to deliver a pre-pilot diesel quantity directly into the combustion chamber at an early stage of a compression stroke, and is activated again for a second time to deliver a pilot diesel quantity directly into the combustion chamber at a later stage of the compression stroke. A total air/fuel ratio within the combustion chamber upon completion of the second diesel fuel injector activation is lean. The air/fuel mixture is combusted during a combustion stroke, and combustion products are removed during an exhaust stroke.

Abstract translation: 用于操作发动机的系统和方法包括控制再循环废气的温度以实现预定的再循环废气温度。 空气和温度控制的再循环废气的混合物在燃烧室中进入，并且气体燃料喷射器在进气冲程期间输送气体燃料。 柴油燃料喷射器首次被激活以在压缩冲程的早期阶段将预先的先导柴油量直接输送到燃烧室中，并且再次被再次启动以将引燃柴油量直接输送到燃烧 在压缩冲程的后期阶段。 完成第二柴油喷射器启动后，燃烧室内的总空气/​​燃料比是稀的。 空气/燃料混合物在燃烧冲程期间燃烧，并且在排气冲程期间除去燃烧产物。