F02B 19/1095
With more than one pre-combustion chamber
Official title: {with more than one pre-combustion chamber (a stepped form of the main combustion chamber above the piston is to be considered as a pre-combustion chamber if this stepped portion is not a squish area)}
F02B19/1095 (With more than one pre-combustion chamber) appears on 33 US grants and 35 published applications in this corpus.
Search patents in F02B- Granted patents
- 33
- Published applications
- 35
- Assignees
- 23
- Inventors
- 69
- Latest grant
- 25 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 1 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 1 | 1 |
| 2010 | 1 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 1 |
| 2013 | 1 | 1 |
| 2014 | 2 | 5 |
| 2015 | 1 | 2 |
| 2016 | 3 | 6 |
| 2017 | 7 | 5 |
| 2018 | 5 | 3 |
| 2019 | 1 | 1 |
| 2020 | 1 | 0 |
| 2021 | 0 | 0 |
| 2022 | 1 | 2 |
| 2023 | 0 | 4 |
| 2024 | 1 | 1 |
| 2025 | 1 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- 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
- Internal combustion engine30 Apr 2024US 11,970,965 B2Innio Jenbacher GmbH & Co OG
- Systems, apparatus, and methods for inducing enhanced radical ignition in internal combustion engines using a radical chemicals generator11 Oct 2022US 11,466,608 B2Radical Combustion Technologies, LLC
- Rotary engine with pilot subchambers13 Oct 2020US 10,801,394 B2Pratt & Whitney Canada Corp.
- Precombustion-chamber engine11 Jun 2019US 10,316,733 B2Mitsubishi Heavy Industries Engine & Turbocharger, Ltd.
- 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
- Systems, apparatus, and methods for inducing enhanced radical ignition in internal combustion engines using a radical chemicals generator8 Feb 2024US 2024/0044282 A1Radical Combustion Technologies, LLC
- Engine21 Sep 2023US 2023/0296065 A1Yanmar Holdings Co., Ltd.
- Internal combustion engine24 Aug 2023US 2023/0265780 A1Innio Jenbacher GmbH & Co OG
- Prechamber jet disturbance intensified combustion system3 Aug 2023US 2023/0243291 A1Tianjin University
Most cited
By later US patents
- Multi-chamber igniter45US 8,839,762 B1Woodward, Inc. · 2014
- Method to extend lean ignition limit within internal combustion engine37US 7,100,567 B1Caterpillar Inc. · 2006
- Method and apparatus for accomplishing flame ignition for an internal combustion engine33US 4,218,993 A1980
- Combustion control via homogeneous combustion radical ignition (HCRI) or partial HCRI in cyclic IC engines30US 7,832,372 B2HCRI Technologies International, LLC · 2010
- Internal combustion engine with a subsidiary combustion chamber21US 4,038,959 AToyota Jidosha Kogyo Kabushiki Kaisha · 1977