F02B 23/0672
Omega-piston bowl, i.e. the combustion space having a central projection pointing towards
Official title: {Omega-piston bowl, i.e. the combustion space having a central projection pointing towards the cylinder head and the surrounding wall being inclined towards the cylinder center axis (the surrounding wall being exactly vertical F02B23/0696)}
F02B23/0672 (Omega-piston bowl, i.e. the combustion space having a central projection pointing towards) appears on 267 US grants and 254 published applications in this corpus.
Search patents in F02B- Granted patents
- 267
- Published applications
- 254
- Assignees
- 128
- Inventors
- 675
- Latest grant
- 9 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 4 | 0 |
| 1990 | 4 | 0 |
| 1991 | 5 | 0 |
| 1992 | 7 | 0 |
| 1993 | 1 | 0 |
| 1994 | 5 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 5 | 0 |
| 1998 | 4 | 0 |
| 1999 | 1 | 0 |
| 2000 | 6 | 0 |
| 2001 | 1 | 4 |
| 2002 | 3 | 12 |
| 2003 | 20 | 14 |
| 2004 | 15 | 15 |
| 2005 | 9 | 10 |
| 2006 | 8 | 12 |
| 2007 | 9 | 9 |
| 2008 | 13 | 7 |
| 2009 | 5 | 13 |
| 2010 | 6 | 11 |
| 2011 | 4 | 11 |
| 2012 | 6 | 5 |
| 2013 | 8 | 8 |
| 2014 | 7 | 11 |
| 2015 | 6 | 16 |
| 2016 | 10 | 10 |
| 2017 | 4 | 13 |
| 2018 | 18 | 13 |
| 2019 | 14 | 13 |
| 2020 | 9 | 19 |
| 2021 | 8 | 5 |
| 2022 | 6 | 5 |
| 2023 | 5 | 8 |
| 2024 | 4 | 3 |
| 2025 | 4 | 4 |
| 2026 | 2 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Port assembly for 2-stroke diesel engine9 Jun 2026US 12,650,106 B2DeltaHawk Engines, Inc.
- Stratified nitrogen enriched air (NEA) strategies and methods to reduce NOx emissions from engines12 May 2026US 12,624,654 B2Saudi Arabian Oil Company
- Systems, apparatus, and methods for inducing enhanced radical ignition in internal combustion engines using a radical chemicals generator25 Nov 2025US 12,480,435 B2Radical Combustion Technologies, LLC
- Piston for compression-ignition engine having antebowl and engine operating strategy utilizing same8 Jul 2025US 12,352,200 B2Caterpillar Inc.
- Stoichiometric high-temperature direct-injection compression-ignition engine14 Jan 2025US 12,196,125 B2The Board of Trustees of the Leland Stanford Junior University
- Piston Bowl For An Internal Combustion Engine20 Aug 2026US 2026/0243215 A1Perkins Engines Company Limited
- Piston for reciprocating within a cylinder in an internal combustion engine18 Jun 2026US 2026/0168460 A1Cummins Inc.
- Systems, apparatus, and methods for inducing enhanced radical ignition in internal combustion engines using a radical chemicals generator7 May 2026US 2026/0126001 A1Radical Combustion Technologies, LLC
- Piston with combustion stabilizing bowl25 Sep 2025US 2025/0297569 A1Caterpillar Inc.
- Stratified nitrogen enriched air (nea) strategies and methods to reduce nox emissions from engines31 Jul 2025US 2025/0243799 A1Saudi Arabian Oil Company
Most cited
By later US patents
- Multiple operating mode engine and method of operation134US 6,561,157 B2Cummins Inc. · 2003
- Apparatus and method for controlling homogeneous charge compression ignition combustion in diesel engines91US 5,832,880 ASouthwest Research Institute · 1998
- Variable compression ratio engine74US 5,682,854 AKomatsu Ltd. · 1997
- Intensifier-injector for gaseous fuel for positive displacement engines67US 5,315,973 AThe University of British Columbia · 1994
- Multiple operating mode engine and method of operation64US 6,907,870 B2Cummins Inc. · 2005