Four-stroke engine, and working machine using it

FIELD: engines and pumps.

SUBSTANCE: invention can be used in internal combustion engines. Four-stroke engine (1) includes an engine housing containing a section of cylinder block (2), in which a cylinder is created, a section of cylinder head (4), which is located above the section of cylinder block (2), a section of engine crankcase (6), which is located below the section of cylinder block (2), crankshaft (8), fuel tank (16), oil tank (14), carburettor (15) and muffler (17). Into sections of cylinder head (4) , in the engine housing inlet and outlet valves (20) and (21) are installed. Crankshaft (8) is installed in engine crankcase (6) that serves as a support for it. Fuel tank (16) is installed in the space below carburettor (15) alongside of crankshaft (8) and oil tank (14). The invention describes versions of design of working machines using a four-stroke engine.

EFFECT: reduction of overall dimensions of an engine.

20 cl, 6 dwg

 



 

Same patents:

FIELD: engines and pumps.

SUBSTANCE: invention can be used in four-stroke engines used in portable motorised tools. Four-stroke engine (1) includes housing (3) of a cylinder, which has opening (5) of the cylinder, in which piston (6) is located with a possibility of back-and-forth movement. Case (4) in which crank shaft (10) is installed with a possibility of being rotated is attached to housing (3) of the cylinder. Partition wall (43), (44) divides the inner space of case (4) into crank case (41), in which crank shaft (10) is installed and oil chamber (42) containing the oil that serves for lubrication of crank shaft (10). There is connection passage (45) connecting crank case (41) to oil chamber (42) and guiding the oil contained in crank case (41) and dripping under action of gravity force into oil chamber (42) and a supply assembly of oil contained in the oil chamber, which provides oil pumping to crank case (41). If an upward direction is determined as a direction in which piston (6) moves from the lower dead point to the upper dead point, then a cross section of partition wall (43), (44) is actually V-shaped if to look in an axial direction of crank shaft (10) and faces with its apex downwards, and connection passage (45) is made at the apex of the V-shaped cross section. A bush cutter is developed, which contains a four-stroke engine and a motorised tool containing a four-stroke engine.

EFFECT: preservation of reliable oil supply irrespective of location of an engine in an inclined state.

11 cl, 17 dwg

Carburettor unit // 2553481

FIELD: engines and pumps.

SUBSTANCE: invention relates to appliances for carburettors used for drives of hand-held tools. Proposed unit comprises carburettor (9) with inlet channel section (10). Said section accommodates throttle element and air choke element. First coupling element is fixed with throttle element while second coupling element is fixed with air choke element. In compliance with this invention, first and second coupling elements make a locking device which impedes closure of air choke element at idle throttle element.

EFFECT: simplified design, inhibited closure of air choke at idle throttle element.

19 cl, 22 dwg

FIELD: engines and pumps.

SUBSTANCE: proposed engine comprises cylindrical housing with cover and bottom, percussion piston axially spring-loaded and fitted therein, combustion chamber arranged under housing cover, rod end composed of percussion piston second end and bottom, return spring fitted in said rod end and working tool stem extending through the hole on housing bottom outward, vent and bypass channels made in said housing, ignition unit electrically connected with spark plug fitted in housing cover. It differs from known devices in that said housing and piston are made of nonmagnetic material. Besides, this engine includes electronical unit, storage battery, generator, magnet fitted in nonmagnetic main piston, fuel pump, buffer fuel, electrically controlled atomiser and contactless ignition control system.

EFFECT: higher efficiency and reliability.

1 dwg

FIELD: engines and pumps.

SUBSTANCE: invention relates to hand-held devices driven by ICE. Proposed device comprises housing of engine (200) and ICE (202) with cylinder (204) and crankshaft. It incorporates fan wheel (214) driven by crankshaft to run about axle A. Fan casing (216) surrounds fan wheel (214) to interact therewith. Inlet (224) for air to be combusted is arranged radially outside fan wheel (214) to direct air to ICE (202) and has inlet (226) and channel (228). Inlet (226) has first edge (230) radially abutting on has wheel (214) outer periphery (220). Angle X between first line L1 extending radially from axle A parallel with the main direction of cylinder (204) and radius L2 extending radially from axle A so that to cross said first edge (230), is smaller than 70 degrees, preferably, smaller than 66 degrees and, more preferably, than 62 degrees. Invention covers the versions of hand-held device.

EFFECT: decreased weight.

20 cl, 6 dwg

FIELD: machine building.

SUBSTANCE: invention refers to bearing unit of crankshaft of internal combustion engine. The bearing unit consists of bearing (10) mounted on crankshaft (16) of the internal combustion engine, of seat (11, 15) of the bearing designed for placement of bearing (10) and of system (20) of packing designed for sealing relative to crankshaft (16) and seat (11, 15) of the bearing. At least one part of seat (11) of the bearing has a reinforcing element (12) positioned in the seat of the bearing. Also, surface (13) of at least one part of seat (11) of the bearing adjoining bearing (10) is made out of plastic. There are also claimed the internal combustion engine comprising the said bearing unit and a hand tool with a mechanical drive containing the said internal combustion engine.

EFFECT: improved bearing unit of crankshaft due to bearing unit sealing and optimal installation of bearing and/or bushing of bearing in seat of bearing with decreased allowances, which prevents bearing and/or bushing of bearing rotation in bearing seat; minimised hazard of bearing distortion and bearing and/or bushing of bearing compression in bearing seat under force causing finite destruction of bearing and/or bushing of bearing.

13 cl, 4 dwg

FIELD: mechanical engineering.

SUBSTANCE: invention relates to two stroke internal combustion crankcase compression engine designed for use in hand tools. According to invention, engine has at least one air channel between air intake and upper part, two scavenging channels with scavenging ports directed to side of discharge and located close to exhaust hole of cylinder. Engine has at least one scavenging port pointed to side of intake and located close of intake port of cylinder, delivery to said port being provided by at least one scavenging channel. Air channel and scavenging channels are of such design that such amount of air is fed and held in scavenging channels that nothing but air will get out during following scavenging process. Air intake from which air channel branches if provided with limiting valve controlled by at least one parameter of engine, for instance, under action of throttle valve of carburetor. Scavenging ports(s) pointed to side of intake is (are) arranged to provide beginning of delivering of air-fuel mixture later than scavenging with air through scavenging ports pointed to side of exhaust.

EFFECT: reduced consumption of fuel and discharge of noncombusted fuel with exhaust gases.

16 cl, 5 dwg

The invention relates to two-stroke crankcase of the internal combustion engine with scavenging, in which in the upper part of the transmission channels is added to fresh air for use as a buffer in relation to the mixture of the air/fuel below

FIELD: engines and pumps.

SUBSTANCE: invention relates to transport machine building and can be used in pistons engines, particularly in aircraft two-stroke turbo diesels with air cooling. Propose air cooling system comprises working cylinders with heads arranged, for example along circumference and opposed pistons. Note here that outer surfaces of operating cylinders and heads are made ribbed. In compliance with this invention, every pair of operating cylinders has its own crankshaft with helical gear that drives common power take-off-shaft. Note also that said common shaft comprises gears in mesh with gear wheels fitted on operating cylinder outer surface ends to revolve about their lengthwise axes. Outer ribs of adjacent cylinders enter each other. Inner surface of operating cylinder heads have ribs-vanes.

EFFECT: higher efficiency of cylinder cooling, uniform temperature field, elimination of unequal wear of operating cylinders.

3 cl, 9 dwg

FIELD: mechanical engineering; piston engines.

SUBSTANCE: invention can be used in gasoline, gas and diesel internal combustion engines of different application. Proposed engine contains cylinders with linears, pistons, connecting rods, crankshaft, timing gear. Cylinder linears of increased inner volume are provided with cooling ports and double wall forming cooling chamber communicating with inner space through cooling ports. Outer side of cylinders is provided with heat insulating coating. Cooling chamber has channel connecting the chamber with compressor.

EFFECT: increased engine efficiency, reduced fuel consumption, enlarged sphere of application of engines.

1 dwg

FIELD: mechanical engineering; internal combustion engines.

SUBSTANCE: invention relates to piston internal combustion engines and it can be in gasoline, gas and diesel engines of different applications. Proposed engine contains cylinders with liners, pistons, connecting rods, crankshaft, timing gear, cooling system. Cylinders are provided with cooling ribs or cooling jacket. Cylinder liners of increased inner volume are provided with cooling ports and double wall forming cooling chamber communicating with inner volume through cooling ports. Outer side of cylinders is provided with heat insulating coating which increases efficiency by one third and, consequently, decreases fuel consumption also by one third.

EFFECT: increased efficiency, reduced fuel consumption, dispensing with cooling system owing to use of principle of self-cooling of cylinders.

2 cl, 3 dwg

The invention relates to mechanical engineering and can be used in internal combustion engines with air cooling

The invention relates to mechanical engineering and can be used in internal combustion engines with air cooling

The invention relates to mechanical engineering, in particular to internal combustion engines (ice) car

The invention relates to mechanical engineering, in particular to engine, and can be used in the design and development of small internal combustion engines with air cooling for agricultural machinery and vehicles

The invention relates to the field of engine development, in particular for internal combustion engines with air cooling

The invention relates to the field of engineering, namely the engine, in particular, to pressurized parts of internal combustion engines, providing effective cooling, anti-vibration and noise attenuation effect

Oil filter assembly // 2557148

FIELD: engines and pumps.

SUBSTANCE: invention relates to oil filters of an internal combustion engine. Oil filter assembly (40, 240) of internal combustion engine (10), which has housing (50, 261, 361) provided with oil inlet opening (51, 265, 365), oil outlet opening (52, 266, 366), pipeline (56, 268, 368) connecting oil inlet opening (51, 265, 365) to oil outlet opening (52, 266, 366), and chamber (53, 264, 364) for arrangement of filter element (62, 262, 362), which is interconnected with oil inlet opening (51, 265, 365) and oil outlet opening (52, 266, 366); with that, oil filter assembly (40, 240) also includes valve assembly (57, 269, 362, 58, 270, 367) located in pipeline (56, 268, 368) and providing a lubricating oil flow depending on pressure of lubricating oil in oil inlet opening (51, 265, 365).

EFFECT: invention provides elimination of blockage of a filter element.

13 cl, 9 dwg

FIELD: engines and pumps.

SUBSTANCE: invention relates to ICE lubing. In compliance with this method, fuel second injections are executed into said ICE to activate the recovery of carbon-black filter and evaporation of fuel hydrocarbons affecting the oil thickness.First, defined is if recovery of carbon-black filter occurs. In case it does oil thickness reduction at carbon-black filter recovery is defined subject to oil thinning out. Then, oil thickness rise after said reduction is calculated subject to fuel hydrocarbons evaporation rate and duration. Note here that the latter is defined subject to duration of fuel hydrocarbons evaporation inside engine during previous evaporation.

EFFECT: longer life, higher reliability.

9 cl, 5 dwg, 1 tbl

FIELD: machine building.

SUBSTANCE: invention relates to machine building. Lubing system has oil feed channel to communicate oil tank with crankcase inner chamber to feed liquid oil therein at negative pressure inside crankcase. Said channel to feed oil into crankcase and to transfer mist formed inside crankcase at positive pressure into oil tank. It comprises means for liquefaction of oil mist to decreased oil mist concentration. Besides, there is channel to feed oil mist from oil tank to working valve chamber by liquefaction means.

EFFECT: efficient lubrication without increase in oil consumption.

10 cl, 8 dwg

FIELD: engines and pumps.

SUBSTANCE: proposed system comprises opening end of vent duct arranged, in fact, at the centre of working valve chamber centre and working valve chamber composed by attachment of the working valve chamber jacket. Inner jacket is attached to working valve chamber jacket inner surface to be aligned with and in contact with working valve chamber jacket inner surface. Suction channel is composed by clearance between peripheral edge of the top plate part and inner jacket. Three or more suction pipes interacting with suction channel are arranged inside inner jacket. Note here that every suction pipe has opening end. Note also that one of opening ends of suction pipe is located lower than vent duct opening end at operating four-stroke engine.

EFFECT: higher efficiency.

4 cl, 10 dwg

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