Pressure detection signal processing device, engine control system, and non-transitory computer readable medium storing a program
US-2020158588-A1 · May 21, 2020 · US
for detecting or indicating knocks in internal-combustion engines; Units comprising pressure-sensitive members combined with ignitors for firing internal-combustion engines
for detecting or indicating knocks in internal-combustion engines; Units comprising pressure-sensitive members combined with ignitors for firing internal-combustion engines · Cooperative Patent Classification (CPC)
Computing, optics, measurement, and control technologies.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | G01L23/22 |
| Official title | for detecting or indicating knocks in internal-combustion engines; Units comprising pressure-sensitive members combined with ignitors for firing internal-combustion engines |
| Display label | for detecting or indicating knocks in internal-combustion engines; Units comprising pressure-sensitive members combined with ignitors for firing internal-combustion engines |
| Total patents | 87 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 8 |
| 2016 | 16 |
| 2017 | 15 |
| 2018 | 7 |
| 2019 | 13 |
| 2020 | 11 |
| 2021 | 11 |
| 2022 | 3 |
| 2023 | 1 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method and device for knock recognition of an internal combustion engine
US-10508963-B2 · Dec 17, 2019 · US
Method for determining a measurand and sensor system
US-2019376407-A1 · Dec 12, 2019 · US
Method and system for determining engine knock background noise levels
US-2019360420-A1 · Nov 28, 2019 · US
Internal combustion engine
US-10487731-B2 · Nov 26, 2019 · US
Attachment structure of glow plug with combustion pressure sensor and glow plug with combustion pressure sensor
US-2019271468-A1 · Sep 5, 2019 · US
Control device for internal combustion engine
US-10371115-B2 · Aug 6, 2019 · US
Method and system for knock sensor rationality check
US-10371079-B2 · Aug 6, 2019 · US
Pressure sensor
US-2019195716-A1 · Jun 27, 2019 · US
Control device for internal combustion engine and control method for internal combustion engine
US-2019195148-A1 · Jun 27, 2019 · US
Combustion pressure sensor with built-in charge amplifier
US-10247633-B2 · Apr 2, 2019 · US
Detecting device and detecting system
US-2019078958-A1 · Mar 14, 2019 · US
Pressure detection device and pressure detection system
US-2019056282-A1 · Feb 21, 2019 · US
Glow-plug adaptor for pressure measurements
US-10168242-B2 · Jan 1, 2019 · US
Dual fuel combustion intensity
US-2018321105-A1 · Nov 8, 2018 · US
Pressure sensor including variable member having rear end connected to housing at a predetermined axial position
US-10048153-B2 · Aug 14, 2018 · US
Method and device for knock recognition of an internal combustion engine
US-2018087994-A1 · Mar 29, 2018 · US
Method and system for knock sensor rationality check
US-2018073457-A1 · Mar 15, 2018 · US
Methods and systems to derive health of mating cylinder using knock sensors
US-9915217-B2 · Mar 13, 2018 · US
Combustion pressure sensor
US-2018058968-A1 · Mar 1, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC G01L23/22?
- CPC G01L23/22 is the Cooperative Patent Classification code for “for detecting or indicating knocks in internal-combustion engines; Units comprising pressure-sensitive members combined with ignitors for firing internal-combustion engines.”
- How many patents are filed under CPC G01L23/22 (for detecting or indicating knocks in internal-combustion engines; Units comprising pressure-sensitive members combined with ignitors for firing internal-combustion engines)?
- Our database includes 87 publications tagged with this CPC code.
- Is patent activity under CPC G01L23/22 growing?
- Publication counts under this code: 1 in 2023 vs 2 in 2025 (latest complete years).