F02B 23/0627
Having additional bores or grooves machined into the piston for guiding air
Official title: {having additional bores or grooves machined into the piston for guiding air or charge flow to the piston bowl}
F02B23/0627 (Having additional bores or grooves machined into the piston for guiding air) appears on 56 US grants and 38 published applications in this corpus.
Search patents in F02B- Granted patents
- 56
- Published applications
- 38
- Assignees
- 32
- Inventors
- 111
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 3 | 0 |
| 1997 | 2 | 0 |
| 1998 | 4 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 2 | 1 |
| 2005 | 0 | 1 |
| 2006 | 2 | 0 |
| 2007 | 0 | 0 |
| 2008 | 1 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 3 |
| 2012 | 1 | 2 |
| 2013 | 2 | 2 |
| 2014 | 3 | 1 |
| 2015 | 2 | 3 |
| 2016 | 3 | 4 |
| 2017 | 2 | 1 |
| 2018 | 4 | 2 |
| 2019 | 3 | 6 |
| 2020 | 4 | 6 |
| 2021 | 2 | 3 |
| 2022 | 0 | 1 |
| 2023 | 2 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 1 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Piston with combustion stabilizing bowl4 Aug 2026US 12,698,734 B2Caterpillar Inc.
- Engine management system and method14 Mar 2023US 11,603,808 B2Sonex Research, Inc.
- Fuel system for reducing fuel targeting errors and engine operating method7 Mar 2023US 11,598,300 B2Caterpillar Inc.
- Diesel engine, motor vehicle and method for reducing heat transfer to a piston of a cylinder of a diesel engine2 Nov 2021US 11,162,410 B2Scania CV AB
- Fuel system for reducing fuel targeting errors and engine operating method27 Apr 2021US 10,989,153 B2Caterpillar Inc.
- Piston with combustion stabilizing bowl25 Sep 2025US 2025/0297569 A1Caterpillar Inc.
- Passive prechamber lean burn combustion system14 Jul 2022US 2022/0220921 A1Aramco Services Company
- Engine management system and method12 Aug 2021US 2021/0246845 A1Sonex Research, Inc.
- Diesel engine, motor vehicle and method for reducing heat transfer to a piston of a cylinder of a diesel engine17 Jun 2021US 2021/0180508 A1Scania CV AB
- Fuel system for reducing fuel targeting errors and engine operating method3 Jun 2021US 2021/0164428 A1Caterpillar Inc.
Most cited
By later US patents
- Hybrid electric vehicle127US 5,881,559 AIsuzu Ceramics Research Institute Co., Ltd. · 1999
- Combustion chamber for internal combustion engine and process of combustion using fuel radical species42US 5,322,042 ASonex Research, Inc. · 1994
- Combined cycle engine29US 5,549,087 AThe United States of America as represented by the Administrator of the U. S. Environmental Protection Agency · 1996
- Piston and process for achieving controlled ignition and combustion of hydrocarbon fuels in internal combustion engines by generation and management of fuel radical species24US 4,898,135 ASonex Research, Inc. · 1990
- Internal combustion engine squish jet combustion chamber21US 4,572,123 AThe University of British Columbia · 1986