Internal combustion engine and piston having stepped combustion bowl with non-axisymmetric profile

Patent · Tue Mar 15 00:00:00 EDT 2022

OSTI ID:1892707

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

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.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL (United States); Caterpillar, Inc., Peoria, IL (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-06CH11357
• Assignee: Caterpillar Inc. (Peoria, IL)
• Patent Number(s): 11,274,628
• Application Number: 16/889,958
• OSTI ID: 1892707
• Country of Publication: United States
• Language: English