Methods of operation using a variable valve timing mechanism

Filing statistics

CPC F01L 2800/00 belongs to the parent subclass F01L, which recorded 25,057 patent applications worldwide between 2013 and 2023. Annual filings declined from 2,769 in 2013 to 732 in 2023 (-74%), peaking at 3,219 applications in 2015. The most active applicants in class F01 are GE (GENERAL ELECTRIC COMPANY) (9,989 applications), UNITED TECHNOLOGIES CORPORATION (UTC) (8,110 applications) and SAFRAN AIRCRAFT ENGINES (6,248 applications).

Source: EPO PATSTAT, worldwide filings

18 direct subcodes

Child Classifications

Navigate with arrow keys, Enter to open

F01L 2800/01 Starting
F01L 2800/02 Cold running
F01L 2800/03 Stopping; Stalling
F01L 2800/04 Timing control at idling
F01L 2800/05 Timing control under consideration of oil condition
F01L 2800/06 Timing or lift different for valves of same cylinder
F01L 2800/08 Timing or lift different for valves of different cylinders
F01L 2800/09 Calibrating
F01L 2800/10 Providing exhaust gas recirculation [EGR]
F01L 2800/11 Fault detection, diagnosis
F01L 2800/12 Fail safe operation
F01L 2800/13 Throttleless
F01L 2800/14 Determining a position, e.g. phase or lift
F01L 2800/15 Balancing of rotating parts
F01L 2800/16 Preventing interference
F01L 2800/17 Maintenance; Servicing
F01L 2800/18 Testing or simulation
F01L 2800/19 Valves opening several times per stroke

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