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公开(公告)号：US20180149125A1
公开(公告)日：2018-05-31
申请号：US15573527
申请日：2015-06-30
Applicant: CUMMINS INC.
Inventor： Darren Ting , Patrick M. Pierz
CPC classification number: F02M53/046 , F01P3/02 , F01P3/16 , F01P2003/024 , F02B19/108 , F02B19/12 , F02B19/18 , F02B2019/006 , F02M21/0215 , F02M21/0278 , F02M53/043 , F02M57/06 , F02M61/14 , F02M2200/8061 , F02M2200/858 , F02M2200/9053 , Y02T10/125 , Y02T10/32
Abstract: An apparatus and method are disclosed for an injector assembly including an injector tip having a prechamber, such as a permanent, passive prechamber (PPPC), and a nozzle combustion shield (NCS) to mitigate pre-ignition events, such as knocking, caused by overheating of the prechamber. The NCS has a thermal conductivity greater than the injector tip. The NCS optionally includes a barrel forming a slip fit with the cylinder head bore and forming a press fit with the injector tip. The NCS also optionally includes a brim to form a combustion seal with a cylinder head. As the spark plug ignites a fuel charge in the prechamber, heat is absorbed into the injector tip, flows into the NCS barrel, out of the NCS brim, and into the cylinder head for cooling via a cooling jacket.
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公开(公告)号：US10451014B2
公开(公告)日：2019-10-22
申请号：US15573527
申请日：2015-06-30
Applicant: CUMMINS INC.
Inventor： Darren Ting , Patrick M. Pierz
IPC: F02M53/04 , F02B19/12 , F02B19/18 , F02M21/02 , F02M61/14 , F01P3/02 , F01P3/16 , F02B19/10 , F02B19/00
Abstract: An apparatus and method are disclosed for an injector assembly including an injector tip having a prechamber, such as a permanent, passive prechamber (PPPC), and a nozzle combustion shield (NCS) to mitigate pre-ignition events, such as knocking, caused by overheating of the prechamber. The NCS has a thermal conductivity greater than the injector tip. The NCS optionally includes a barrel forming a slip fit with the cylinder head bore and forming a press fit with the injector tip. The NCS also optionally includes a brim to form a combustion seal with a cylinder head. As the spark plug ignites a fuel charge in the prechamber, heat is absorbed into the injector tip, flows into the NCS barrel, out of the NCS brim, and into the cylinder head for cooling via a cooling jacket.
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公开(公告)号：US20170211508A1
公开(公告)日：2017-07-27
申请号：US15321631
申请日：2015-06-30
Applicant: Cummins Inc.
Inventor： Patrick M. Pierz , Leon A. LaPointe
CPC classification number: F02F1/4214 , F01L1/26 , F01L2800/10 , F02B43/10 , F02F2001/247 , Y02T10/32
Abstract: An engine including a gaseous fuel system; a cylinder including a flat combustion face, the flat combustion face including four valves, each valve positioned in a port, the four valves including two intake valves positioned to selectively meter intake of charge into the cylinder via respective ports and including two exhaust valves positioned to selectively meter output of exhaust from the cylinder via respective ports. Intake valves are larger than exhaust valves and an ignition source is offset from center of a combustion surface.
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公开(公告)号：US20170138251A1
公开(公告)日：2017-05-18
申请号：US14939572
申请日：2015-11-12
Applicant: Cummins Inc.
Inventor： Atsuhiko Watanabe , Patrick M. Pierz , Darren Ting
CPC classification number: F02B19/18 , F02B19/10 , F02B19/1004 , F02B19/1019 , F02B19/108 , F02B19/12 , F02P13/00 , F02P15/006 , Y02T10/125
Abstract: An engine includes a cylinder having an internal combustion chamber and extending longitudinally, a cylinder head coupled to the cylinder, and a fuel-fed pre-chamber positioned within a portion of the cylinder head. The pre-chamber includes a pre-chamber volume and plurality of nozzle holes extending from the pre-chamber volume. The engine also includes an ignition source positioned longitudinally above the pre-chamber volume and a locating member positioned on at least one of the pre-chamber and the cylinder head. The locating member is configured to position the pre-chamber in a predetermined orientation within the cylinder head.
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