IPC 7 English version F02B 55/00-F02B 79/00

F02B05500-F02B07900

SECTION F – MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING

F 02

COMBUSTION ENGINES (cyclically operating valves therefor, lubricating, exhausting, or silencing engines F01); HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS

F 02 B

INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL (internal-combustion turbines F02C; plants in which engines use combustion products F02C, F02G)

55/

Internal-combustion aspects of rotary pistons; Outer members for co-operation with rotary pistons

55/

Pistons

55/

Cooling thereof

55/

by air or other gas

55/

Outer members for co-operation with rotary pistons; Casings

55/

Cooling thereof

55/

by air or other gas

55/

Shapes or constructions of combustion chambers

55/

Admission or exhaust passages in pistons or outer members

Internal-combustion aspects of reciprocating-piston engines with movable cylinders

57/

Internal-combustion aspects of rotary engines in which the combusted gases displace one or more reciprocating pistons

57/

Fuel or combustion-air supply (cylinder-charge admission or exhaust control F02B 57/04)

57/

Control of cylinder-charge admission or exhaust (peculiar to two-stroke engines or to other engines with working-piston-controlled charge admission or exhaust F02B 57/06)

57/

Two-stroke engines or other engines with working-piston-controlled cylinder-charge admission or exhaust (with combustion space in centre of star F02B 57/10)

57/

Engines with star-shaped cylinder arrangements

57/

with combustion space in centre of star

59/

Internal-combustion aspects of other reciprocating-piston engines with movable, e.g. oscillating, cylinders (with yieldable walls F02B 75/38)

Adaptations of engines for special use; Combinations of engines with devices other than engine parts or auxiliaries (of rotary-piston or oscillating-piston engines F02B 53/14; aspects predominantly concerning such devices, see the relevant classes for the devices)

61/

Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing (the engine torque being divided by a differential gear for driving a scavenging or charging pump and the engine output shaft F02B 39/06; arrangements in vehicles, see the relevant classes for vehicles)

61/

for driving cycles

61/

for driving propellers

61/

Combinations of engines with mechanical gearing (F02B 61/02, F02B 61/04 take precedence)

63/

Adaptations of engines for driving hand-held tools, electric generators, or pumps; Portable combinations with engine-driven devices

63/

for hand-held tools

63/

for electric generators

63/

for pumps

65/

Adaptations of engines for other special use; Combinations of engines with other devices, e.g. with non-driven apparatus

Engines with pertinent characteristics other than those provided for in, or of interest apart from, preceding main groups

67/

Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for

67/

of mechanically-driven auxiliary apparatus

67/

driven by means of chains, belts, or like endless members

67/

of non-mechanically driven auxiliary apparatus

67/

of charging or scavenging apparatus [5]

69/

Internal-combustion engines convertible into other combustion-engine type, not provided for in group F02B 11/00; Internal-combustion engines of different types characterised by constructions facilitating use of same main engine-parts in different types

69/

for different fuel types, other than engines indifferent to fuel consumed, e.g. convertible from light to heavy fuel

69/

for gaseous and non-gaseous fuels

69/

for different cycles, e.g. convertible from two-stroke to four-stroke

71/

Free-piston engines; Engines without rotary main shaft

71/

Starting

71/

Adaptations of such engines for special use; Combinations of such engines with apparatus driven thereby (aspects predominantly concerning driven apparatus, see the relevant classes for such apparatus)

71/

Free-piston combustion gas generators

73/

Combinations of two or more engines, not otherwise provided for

75/

Other engines

75/

Engines characterised by their cycles, e.g. six-stroke

75/

Engines with variable distances between pistons at top dead-centre positions and cylinder heads

75/

Engines with means for equalising torque (compensations of inertial forces, suppression of vibration in systems F16F)

75/

Engines with means for preventing corrosion in gas-swept spaces

75/

Engines with means for rendering exhaust gases innocuous (apparatus for rendering exhaust gases innocuous per se F01N 3/08)

75/

Other methods of operation

75/

Engines characterised by number of cylinders, e.g. single-cylinder engines (F02B 75/26 takes precedence)

75/

Multi-cylinder engines (scavenging aspects F02B 25/00)

75/

with cylinders all in one line

75/

with cylinders in V-, fan-, or star-arrangement

75/

with cylinders arranged oppositely relative to main shaft and of "flat" type

75/

Engines with cylinder axes coaxial with, or parallel or inclined to, main-shaft axis; Engines with cylinder axes arranged substantially tangentially to a circle centred on main-shaft axis

75/

Engines with two or more pistons reciprocating within same cylinder or within essentially coaxial cylinders (arranged oppositely relative to main shaft F02B 75/24)

75/

with one working piston sliding inside another

75/

Engines characterised by connections between pistons and main shafts and not specific to preceding main groups

75/

Ultra-small engines, e.g. for driving models

75/

Engines with parts of combustion- or working-chamber walls resiliently yielding under pressure

75/

Reciprocating-piston engines (F02B 75/04 takes precedence; with resiliently-urged auxiliary piston in pre-combustion chamber F02B 19/06)

75/

Other reciprocating-piston engines

77/

Component parts, details, or accessories, not otherwise provided for

77/

Surface coverings of combustion-gas-swept parts (of pistons or cylinders only F02F)

77/

Cleaning of, preventing corrosion or erosion in, or preventing unwanted deposits in, combustion engines

77/

Safety, indicating, or supervising devices (thermal insulation F02B 77/11; monitoring or diagnostic devices for exhaust-gas treatment apparatus F01N 11/00)

77/

Safety means relating to crankcase explosions

77/

Thermal or acoustic insulation [3]

77/

Acoustic insulation [3]

77/

Engine-driven auxiliary devices combined into units

79/

Running-in of internal-combustion engines (lubrication thereof F01M)

F02B 31/00 - F02B 53/14