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IPC 7
  F02 - F02B 29/08  
F02B03100-F02B05314
  F02B 55/00 - F02B 79/00  

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


F 02COMBUSTION ENGINES (cyclically operating valves therefor, lubricating, exhausting, or silencing engines F01); HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS


F 02 BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL (internal-combustion turbines F02C; plants in which engines use combustion products F02C, F02G)


31/

00Modifying induction systems for imparting a rotation to the charge in the cylinder (structural features of induction systems F02M)

31/

02.in engines having inlet valves arranged eccentrically to cylinder axis (F02B 31/08 takes precedence)  [6]

31/

04.by means within the induction channel, e.g. deflectors  [6]

31/

06..Movable means, e.g. butterfly valves  [6]

31/

08.having multiple air inlets  [6]


Engines characterised by provision of driven charging or scavenging pumps (introducing fuel into cylinders by air pressure F02B 13/00; after-charging F02B 29/06; arrangements of such pumps or other auxiliary apparatus on engines F02B 67/00; combined engine and pump control, control dependent on variables other than those generic to pump F02D)


33/

00Engines with pumps for charging or scavenging (with pumps for sucking combustion residues from cylinders F02B 35/00; with exhaust-driven pumps F02B 37/00)

33/

02.Engines with reciprocating-piston pumps; Engines with crankcase pumps

33/

04..with simple crankcase pumps, i.e. with the rear face of a non-stepped working piston acting as sole pumping member in co-operation with the crankcase

33/

06..with reciprocating-piston pumps other than simple crankcase pumps

33/

08...with the working-cylinder head arranged between working and pumping cylinders

33/

10...with the pumping cylinder situated between working cylinder and crankcase, or with the pumping cylinder surrounding working cylinder

33/

12....the rear face of working piston acting as pumping member and co-operating with a pumping chamber isolated from crankcase, the connecting-rod passing through the chamber and co-operating with movable isolating member

33/

14....working and pumping pistons forming stepped piston

33/

16....working and pumping pistons having differing movements

33/

18...with crankshaft being arranged between working and pumping cylinders

33/

20...with pumping-cylinder axis arranged at an angle to working-cylinder axis, e.g. at an angle of 90°

33/

22...with pumping cylinder situated at side of working cylinder, e.g. the cylinders being parallel

33/

24..with crankcase pumps other than with reciprocating pistons only

33/

26..Four-stroke engines characterised by having crankcase pumps

33/

28..Component parts, details, or accessories of crankcase pumps not provided for in, or of interest apart from, groups F02B 33/02 to F02B 33/26

33/

30...Control of inlet or outlet ports (controlling only working-cylinder inlets F01L)

33/

32.Engines with pumps other than of reciprocating-piston type (with crankcase pumps F02B 33/02)

33/

34..with rotary pumps (with cell-type pressure exchangers or the like F02B 33/42)

33/

36...of positive-displacement type

33/

38....of Roots type

33/

40...of non-positive-displacement type

33/

42..with driven apparatus for immediate conversion of combustion gas pressure into pressure of fresh charge, e.g. with cell-type pressure exchangers (pressure exchangers per se F04F 11/02)

33/

44.Passages conducting the charge from the pump to the engine inlet, e.g. reservoirs (cooling of charge after leaving pump F02B 29/04)


35/

00Engines with pumps for sucking combustion residues from cylinders

35/

02.using rotary pumps


37/

00Engines with pumps driven at least for part of the time by exhaust (passages conducting the charge from the pump to the engine inlet F02B 33/44)

37/

007.with exhaust-driven pumps arranged in parallel  [6]

37/

013.with exhaust-driven pumps arranged in series  [6]

37/

02.Gas passages between engine outlet and pump drive, e.g. reservoirs

37/

04.Engines with exhaust drive and other drive of pumps, e.g. with exhaust-driven pump and mechanically-driven second pump

37/

10..at least one pump being alternately driven by exhaust and other drive  [3]

37/

11...driven by other drive at starting only  [6]

37/

12.Control of the pumps  [3]

37/

14..of the alternation between exhaust drive and other drive of a pump, e.g. dependent on speed  [3]

37/

16..by bypassing charging air  [6]

37/

18..by bypassing exhaust  [6]

37/

20..by increasing exhaust energy, e.g. using combustion chambers  [6]

37/

22..by varying the cross-section of exhaust passages or air passages  [6]

37/

24..by using pumps or turbines with adjustable guide vanes  [6]


39/

00Component parts, details, or accessories relating to, but not provided for in, or of interest apart from, groups F02B 33/00 to F02B 37/00 (pumps in general F04; machine elements in general F16)

39/

02.Drives of pumps (exhaust drives or combined exhaust and other drives F02B 37/00); Varying pump drive gear ratio (control acting both on engine and on pump drive gear ratio F02D)

39/

04..Mechanical drives; Variable-gear-ratio drives (non-mechanical pump drives having variable gear ratio F02B 39/08)

39/

06...the engine torque being divided by a differential gear for driving a pump and the engine output shaft

39/

08..Non-mechanical drives, e.g. fluid drives having variable gear ratio

39/

10...electric

39/

12..Drives characterised by use of couplings or clutches therein (using fluid slip couplings for varying gear ratio F02B 39/08)

39/

14.Lubrication of pumps; Safety measures therefor

39/

16.Other safety measures for, or other control of, pumps



41/

00Engines with special means for improving conversion of heat or pressure energy into mechanical power

41/

02.Engines with prolonged expansion

41/

04..in main cylinders

41/

06..in compound cylinders

41/

08...Two-stroke compound engines

41/

10..using exhaust turbines (use of exhaust turbines for charging F02B 37/00; turbine constructions F01D; gas-turbine plants F02C)


Engines operating on non-liquid fuels; Plants including such engines, i.e. combinations of the engine with fuel-generating apparatus (engines having gas-air charge ignited by compression ignition of an additional fuel F02B 7/06; engines convertible from gas to other fuel consumption F02B 69/04; apparatus for generating fuel, e.g. gas, see the relevant classes, e.g. C10)


43/

00Engines operating on gaseous fuels; Plants including such engines

43/

02.Engines characterised by means for increasing operating efficiency

43/

04..for improving efficiency of combustion

43/

06..for enlarging charge

43/

08.Plants characterised by the engines using gaseous fuel generated in the plant from solid fuel, e.g. wood

43/

10.Engines or plants characterised by use of other specific gases, e.g. acetylene, oxyhydrogen

43/

12..Methods of operating


45/

00Engines operating on other non-liquid fuels; Plants including such engines (plants involving generation of gaseous fuel from solid fuel F02B 43/08)

45/

02.operating on powdered fuel, e.g. powdered coal (operating on fuel containing oxidant F02B 45/06)

45/

04..Plants, e.g. having coal-grinding apparatus

45/

06.operating on fuel containing oxidant

45/

08.operating on other solid fuels

45/

10.operating on mixtures of liquid and non-liquid fuels, e.g. in pasty or foamed state


Methods of operating engines involving specific pre-treating of, or adding specific substances to, combustion air, fuel, or fuel-air mixture of the engines, and not otherwise provided for (apparatus for performing such pretreatments or additions F02M)


47/

00Methods of operating engines involving adding non-fuel substances or anti-knock agents to combustion air, fuel, or fuel-air mixtures of engines

47/

02.the substances being water or steam

47/

04.the substances being other than water or steam only

47/

06..the substances including non-airborne oxygen (F02B 47/10 takes precedence)

47/

08..the substances including exhaust gas

47/

10...Circulation of exhaust gas in closed or semi-closed circuits, e.g. with simultaneous addition of oxygen


49/

00Methods of operating air-compressing compression-ignition engines involving introduction of small quantities of fuel in the form of a fine mist into the air in the engine's intake


51/

00Other methods of operating engines involving pre-treating of, or adding substances to, combustion air, fuel, or fuel-air mixture of the engines

51/

02.involving catalysts

51/

04.involving electricity or magnetism

51/

06.involving rays or sound waves


Internal-combustion aspects of rotary-piston or oscillating-piston engines


53/

00Internal-combustion aspects of rotary-piston or oscillating-piston engines (internal-combustion aspects of rotary pistons or outer members for co-operation therewith F02B 55/00)

53/

02.Methods of operating

53/

04.Charge admission or combustion-gas discharge

53/

06..Valve control therefor

53/

08..Charging, e.g. by means of rotary-piston pump

53/

10.Fuel supply; Introducing fuel to combustion space

53/

12.Ignition

53/

14.Adaptations of engines for driving, or engine combinations with, other devices (aspects predominantly concerning such devices, see the relevant classes for the devices)

  F02 - F02B 29/08    F02B 55/00 - F02B 79/00  
 

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