公开(公告)号：US11274628B2

公开(公告)日：2022-03-15

申请号：US16889958

申请日：2020-06-02

Applicant: Caterpillar Inc. ,  UChicago Argonne, LLC

Inventor： Jonathan William Anders ,  Naga Krishna Chaitanya Kavuri ,  Bobby John ,  Hyderuddin Mohammad ,  Chao Xu ,  Prithwish Kundu

IPC: F02F3/28 ,  F02F3/20 ,  F02B23/06

Abstract: An internal combustion engine system includes an engine housing having a combustion cylinder, and a piston movable within the combustion cylinder to increase a pressure therein to an autoignition threshold for injected fuel. The piston includes a piston crown having a combustion face forming a combustion bowl, and varied in profile to form jet-jet interaction limiters at locations offset from fuel spray jet paths from a fuel injector. The jet-jet interaction limiters include a bowl component and a step component protruding, respectively, within the combustion bowl and a step located transitioning between the combustion bowl and a circumferential rim of the piston. Limiting jet-jet interaction limits soot production in exhaust produced by the engine.

公开(公告)号：US20210372346A1

公开(公告)日：2021-12-02

申请号：US16889958

申请日：2020-06-02

Applicant: Caterpillar Inc. ,  UChicago Argonne, LLC

Inventor： Jonathan Wiliam Anders ,  Naga Krishna Chaitanya Kavuri ,  Bobby John ,  Hyderuddin Mohammad ,  Chao Xu ,  Prithwish Kudu

IPC: F02F3/28

Abstract: An internal combustion engine system includes an engine housing having a combustion cylinder, and a piston movable within the combustion cylinder to increase a pressure therein to an autoignition threshold for injected fuel. The piston includes a piston crown having a combustion face forming a combustion bowl, and varied in profile to form jet-jet interaction limiters at locations offset from fuel spray jet paths from a fuel injector. The jet-jet interaction limiters include a bowl component and a step component protruding, respectively, within the combustion bowl and a step located transitioning between the combustion bowl and a circumferential rim of the piston. Limiting jet-jet interaction limits soot production in exhaust produced by the engine.

公开(公告)号：US11118533B1

公开(公告)日：2021-09-14

申请号：US16889969

申请日：2020-06-02

Applicant: Caterpillar Inc.

Inventor： Jonathan William Anders ,  Naga Krishna Chaitanya Kavuri ,  Bobby John ,  Hyderuddin Mohammad

IPC: F02F3/28 ,  F02F3/20

Abstract: A piston for an internal combustion engine includes a piston having a bowl surface forming a combustion bowl, a rim surface forming an annular rim, and a gallery surface exposed to a backside cooling gallery of the piston. The bowl surface forms a bowl profile varied circumferentially around a piston center axis, and the gallery surface forms a gallery profile that is varied circumferentially around the piston center axis and is congruous with the bowl profile. The gallery surface is concave to the combustion bowl, convex to the backside cooling gallery, and forms no edges exposed within the backside cooling gallery. A wall formed between the combustion bowl and the backside cooling gallery has a heat-dissipation wall thickness defined by the varied bowl profile and the varied gallery profile.