F02B 25/2 Means for reducing the mixing of charge and combustion residues or for preventing escape of fresh charge through outlet ports, not provided for in, or of interest apart from, groups
Introduced: September 1968
Last revised: January 2006
Full Title
Engines characterised by using fresh charge for scavenging cylinders > Means for reducing the mixing of charge and combustion residues or for preventing escape of fresh charge through outlet ports, not provided for in, or of interest apart from, groups
Classification Context
- Section:
- MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- Class:
- COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- Subclass:
- INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
Filing statistics
IPC F02B 25/2 belongs to the parent subclass F02B, which recorded 90,899 patent applications worldwide between 2013 and 2023. Annual filings declined from 8,536 in 2013 to 5,129 in 2023 (-40%), peaking at 9,910 applications in 2015. The most active applicants in class F02 are TOYOTA MOTOR CORPORATION (8,687 applications), ROBERT BOSCH (8,328 applications) and FORD GLOBAL TECHNOLOGIES (7,423 applications).
Source: EPO PATSTAT, worldwide filings
2 direct subcodes
Child Classifications
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- F02B 25/22 by forming air cushion between charge and combustion residues
- F02B 25/24 Inlet or outlet openings being timed asymmetrically relative to bottom dead-centre
Top Applicants
Top 10 applicants by patent filingsfor class F02, 2013–2023, worldwide · Source: EPO PATSTAT
- TOYOTA MOTOR CORPORATION 8,687
- ROBERT BOSCH DE 8,328
- FORD GLOBAL TECHNOLOGIES US 7,423
- GE (GENERAL ELECTRIC COMPANY) US 5,732
- UNITED TECHNOLOGIES CORPORATION (UTC) US 5,592
- HYUNDAI MOTOR COMPANY KR 4,699
- TOYOTA MOTOR CORPORATION JP 4,541
- DENSO CORPORATION 3,711
- WEICHAI POWER COMPANY 3,486
- SAFRAN AIRCRAFT ENGINES FR 3,249