F02D 2250/32
Air-fuel ratio control in a diesel engine
F02D2250/32 (Air-fuel ratio control in a diesel engine) appears on 81 US grants and 54 published applications in this corpus.
Search patents in F02D- Granted patents
- 81
- Published applications
- 54
- Assignees
- 51
- Inventors
- 247
- Latest grant
- 14 Jan 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 3 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 8 | 0 |
| 1999 | 2 | 0 |
| 2000 | 4 | 0 |
| 2001 | 3 | 0 |
| 2002 | 3 | 4 |
| 2003 | 0 | 6 |
| 2004 | 2 | 1 |
| 2005 | 2 | 0 |
| 2006 | 6 | 3 |
| 2007 | 1 | 4 |
| 2008 | 4 | 5 |
| 2009 | 3 | 1 |
| 2010 | 2 | 1 |
| 2011 | 2 | 2 |
| 2012 | 2 | 3 |
| 2013 | 1 | 1 |
| 2014 | 1 | 0 |
| 2015 | 4 | 9 |
| 2016 | 3 | 1 |
| 2017 | 5 | 3 |
| 2018 | 1 | 5 |
| 2019 | 3 | 1 |
| 2020 | 1 | 0 |
| 2021 | 0 | 1 |
| 2022 | 2 | 1 |
| 2023 | 1 | 1 |
| 2024 | 0 | 0 |
| 2025 | 1 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Stoichiometric high-temperature direct-injection compression-ignition engine14 Jan 2025US 12,196,125 B2The Board of Trustees of the Leland Stanford Junior University
- Stoichiometric high-temperature direct-injection compression-ignition engine3 Jan 2023US 11,542,856 B2The Board of Trustees of the Leland Stanford Junior University
- Method for operating an internal combustion engine8 Nov 2022US 11,492,991 B2Perkins Engines Company Limited
- Internal combustion engine system1 Mar 2022US 11,261,804 B2Volvo Truck Corporation
- Method of modelling AFR to compensate for WRAF sensor15 Sep 2020US 10,774,768 B2Delphi Automotive Systems Luxembourg SA
- Temperature-controllable glow plug assisted compression ignition methanol engine and control method thereof23 Jul 2026US 2026/0210322 A1Taiyuan University of Technology
- Stoichiometric High-Temperature Direct-Injection Compression-Ignition Engine9 Nov 2023US 2023/0358161 A1The Board of Trustees of the Leland Stanford Junior University
- Method For Operating An Internal Combustion Engine13 Jan 2022US 2022/0010746 A1Perkins Engines Company Limited
- Internal combustion engine arrangement25 Feb 2021US 2021/0054792 A1Volvo Truck Corporation
- Method of modelling afr to compensate for wraf sensor4 Jul 2019US 2019/0203655 A1Delphi Automotive Systems Luxembourg SA
Most cited
By later US patents
- Optimized lambda and compression temperature control for compression ignition engines133US 6,273,076 B1Servojet Products International · 2001
- Method and apparatus for operating a diesel engine109US 5,771,686 AMercedes-Benz AG · 1998
- Exhaust gas purification device for an internal combustion engine105US 5,732,554 AToyota Jidosha Kabushiki Kaisha · 1998
- Excess air factor control of diesel engine89US 6,993,901 B2Nissan Motor Co., Ltd. · 2006
- Use of sensors in a state observer for a diesel engine82US 7,155,334 B1Honeywell International Inc. · 2006