CPC Subgroup Additional Only
F01N 2900/04 Methods of control or diagnosing
Full Title
Details of electrical control or of the monitoring of the exhaust gas treating apparatus > Methods of control or diagnosing
11 direct subcodes
Child Classifications
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- F01N 2900/0402 using adaptive learning
- F01N 2900/0404 using a data filter
- F01N 2900/0406 using a model with a division of the catalyst or filter in several cells
- F01N 2900/0408 using a feed-back loop
- F01N 2900/0411 using a feed-forward control
- F01N 2900/0412 using pre-calibrated maps, tables or charts
- F01N 2900/0414 using a state observer
- F01N 2900/0416 using the state of a sensor, e.g. of an exhaust gas sensor
- F01N 2900/0418 using integration or an accumulated value within an elapsed period
- F01N 2900/0421 using an increment counter when a predetermined event occurs
- F01N 2900/0422 measuring the elapsed time
Top Applicants
Top 10 applicants by patent filingsfor class F01, 2013–2023, worldwide · Source: EPO PATSTAT
- GE (GENERAL ELECTRIC COMPANY) US 9,989
- UNITED TECHNOLOGIES CORPORATION (UTC) US 8,110
- SAFRAN AIRCRAFT ENGINES FR 6,248
- HYUNDAI MOTOR COMPANY KR 4,530
- SIEMENS DE 4,461
- FORD GLOBAL TECHNOLOGIES US 4,029
- RAYTHEON TECHNOLOGIES CORPORATION US 3,947
- TOYOTA MOTOR CORPORATION JP 3,734
- GE (GENERAL ELECTRIC COMPANY) 3,415
- SCHAEFFLER TECHNOLOGIES & COMPANY DE 3,063