F02M 31/13
Combustion air
F02M31/13 (Combustion air) appears on 118 US grants and 96 published applications in this corpus.
Search patents in F02M- Granted patents
- 118
- Published applications
- 96
- Assignees
- 80
- Inventors
- 267
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 8 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 3 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 5 | 0 |
| 2000 | 6 | 0 |
| 2001 | 3 | 0 |
| 2002 | 3 | 3 |
| 2003 | 0 | 0 |
| 2004 | 2 | 4 |
| 2005 | 3 | 4 |
| 2006 | 3 | 7 |
| 2007 | 3 | 8 |
| 2008 | 3 | 5 |
| 2009 | 6 | 4 |
| 2010 | 1 | 9 |
| 2011 | 5 | 6 |
| 2012 | 2 | 5 |
| 2013 | 6 | 6 |
| 2014 | 8 | 5 |
| 2015 | 3 | 1 |
| 2016 | 4 | 5 |
| 2017 | 1 | 6 |
| 2018 | 3 | 3 |
| 2019 | 2 | 3 |
| 2020 | 2 | 2 |
| 2021 | 5 | 1 |
| 2022 | 2 | 3 |
| 2023 | 3 | 1 |
| 2024 | 2 | 2 |
| 2025 | 3 | 1 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Engine control system for intake valve opening timing during cold start11 Aug 2026US 12,704,099 B2Cummins Power Generation Inc.
- Systems and methods for coordinating an air blend valve with an intake air heater14 Oct 2025US 12,442,352 B1Saudi Arabian Oil Company
- Injection device and electric heating device for corresponding injection device7 Oct 2025US 12,435,687 B2Eberspacher catem GmbH & Co.KG
- Control method for an air intake intercooler that heats or cools intake air of an engine and a control system thereof15 Jul 2025US 12,359,610 B2Weichai Power Co., Ltd.
- Work vehicle6 Aug 2024US 12,055,089 B2Kubota Corporation
- Compression ignition engine and system utilizing ammonia as a fuel source24 Sep 2026US 2026/0286881 A1Analytical Engineering, Inc.
- Internal combustion engine26 Feb 2026US 2026/0055722 A1
- Engine control system for intake valve opening timing during cold start18 Sep 2025US 2025/0290459 A1Cummins Power Generation Inc.
- A control method for an air intake intercooler of an engine and a control system thereof24 Oct 2024US 2024/0352886 A1Weichai Power Co., Ltd.
- Injection Device and Electric Heating Device for Corresponding Injection Device28 Mar 2024US 2024/0102433 A1Eberspacher catem GmbH & Co.KG
Most cited
By later US patents
- Hybrid thermal energy conversion for HCCI heated intake charge system67US 7,621,262 B2Ford Global Technologies, LLC · 2009
- Secondary air supplying apparatus for internal combustion engine and air heating apparatus thereof37US 5,666,804 AMitsubishi Denki Kabushiki Kaisha · 1997
- Air intake heating method and device for internal combustion engines36US 5,094,198 ACummins Electronics Company, Inc. · 1992
- Air intake heater system for internal combustion engines30US 4,944,260 ACummins Electronics Company, Inc. · 1990
- Air intake heating and diagnostic system for internal combustion engines28US 5,482,013 ACummins Engine Company, Inc. · 1996