CN113339154A - Cylinder of four-stroke internal combustion engine - Google Patents

Cylinder of four-stroke internal combustion engine Download PDF

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Publication number
CN113339154A
CN113339154A CN202110543729.3A CN202110543729A CN113339154A CN 113339154 A CN113339154 A CN 113339154A CN 202110543729 A CN202110543729 A CN 202110543729A CN 113339154 A CN113339154 A CN 113339154A
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China
Prior art keywords
cylinder
wall
piston
exhaust valve
arc
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Granted
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CN202110543729.3A
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Chinese (zh)
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CN113339154B (en
Inventor
付俊杰
徐忠智
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Sanhe Keda Science & Technology Co ltd
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Individual
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B77/00—Component parts, details or accessories, not otherwise provided for
    • F02B77/04—Cleaning of, preventing corrosion or erosion in, or preventing unwanted deposits in, combustion engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/18—Other cylinders
    • F02F1/22—Other cylinders characterised by having ports in cylinder wall for scavenging or charging
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F2001/006—Cylinders; Cylinder heads  having a ring at the inside of a liner or cylinder for preventing the deposit of carbon oil particles, e.g. oil scrapers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Abstract

The invention relates to the technical field of internal combustion engines, in particular to a cylinder of a four-stroke internal combustion engine; the device comprises a cylinder body, a spark plug, an inlet valve, an exhaust valve, a crank, a connecting rod and a piston; the cylinder of the four-stroke internal combustion engine also comprises a fixed part, a rotating part, a shifting sheet and an annular sleeve; a fixing piece is fixedly connected to one side wall of the exhaust port; the inner wall of the fixed part is provided with a connecting groove; the rotating piece is rotatably connected with the connecting groove, and a shifting piece is uniformly arranged on one side wall of the rotating piece, which is close to the piston, along the circumferential direction; according to the invention, through the linear reciprocating motion of the exhaust valve, the impurities on the exhaust valve are cleaned in a rotating way by matching with the use of the rotating piece and the shifting piece, so that the accumulation of the impurities on the exhaust valve is avoided, and the smoothness of the exhaust port is ensured; in addition, the annular sleeve is driven to move by the linear reciprocating motion of the piston, so that the inner wall of the cylinder chamber is cleaned, the friction between the surface of the piston and the inner wall of the cylinder chamber is reduced, and the working efficiency of the cylinder is improved.

Description

Cylinder of four-stroke internal combustion engine
Technical Field
The invention relates to the technical field of internal combustion engines, in particular to a cylinder of a four-stroke internal combustion engine.
Background
An internal combustion engine is a power machine, and is a heat engine which burns fuel in the machine and directly converts the heat energy released by the fuel into power; the internal combustion engine in a broad sense includes not only a reciprocating piston type internal combustion engine, a rotary piston type engine and a free piston type engine but also a gas turbine of a rotary vane type, a jet engine and the like, but the internal combustion engine is generally referred to as a piston type internal combustion engine; the piston type internal combustion engine mixes fuel and air and burns the fuel and the air in a cylinder of the piston type internal combustion engine, and the released heat energy enables the cylinder to generate high-temperature and high-pressure fuel gas; the gas expands to push the piston to do work, and then mechanical work is output through a crank connecting rod mechanism or other mechanisms to drive the driven machinery to work; the existing internal combustion engine can generate impurities in the cylinder after the internal oil-gas mixture is combusted, and the impurities are adhered to an exhaust valve to influence the exhaust efficiency of the cylinder and even block the exhaust port; impurities adhered to the inner wall of the cylinder chamber can increase the friction force between the piston and the inner wall of the cylinder chamber, so that the piston can be abraded, and the sealing performance of the cylinder is influenced; the abrasion of the piston not only affects the service life of the piston, but also affects the working efficiency of the cylinder, and the cylinder can be seriously failed.
For example, a chinese patent with application number CN201910389471.9 discloses a four-stroke internal combustion engine, which comprises a cylinder, a cylinder chamber, a crank chamber, a cylinder inlet, an inlet valve, an exhaust valve, a first inlet manifold, an exhaust manifold, and a second inlet manifold, wherein the first inlet manifold is arranged at one end of the cylinder, and the exhaust manifold is arranged at the other end of the cylinder; the intake valve is communicated with the first intake manifold; a second air inlet manifold is arranged between the first air inlet manifold and the crankshaft chamber; the exhaust manifold is communicated with an exhaust valve; the device also comprises a power unit, an exhaust unit, a transmission unit and an air supply unit; the technical scheme can effectively collect waste gas energy, save energy and reduce emission, effectively slow down the impact of the air inlet of the cylinder on the piston and prolong the service life of the piston; however, the technical scheme cannot effectively clean impurities attached to the inner walls of the exhaust valve and the cylinder chamber, and the limitation of the scheme is caused.
In view of the above, in order to overcome the above technical problems, the present invention provides a cylinder for a four-stroke internal combustion engine, which solves the above technical problems.
Disclosure of Invention
In order to make up for the defects of the prior art, the four-stroke internal combustion engine cylinder provided by the invention has the advantages that the smoothness of the exhaust port is always kept in the working process of the cylinder, the friction force between the piston and the inner wall of the cylinder chamber is reduced, the service life of the piston is prolonged, and the working efficiency of the cylinder is improved.
The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a cylinder of a four-stroke internal combustion engine, which comprises a cylinder body, a spark plug, an inlet valve, an exhaust valve, a crank, a connecting rod and a piston, wherein the cylinder body is provided with a cylinder cover; a crank chamber and a cylinder chamber are arranged in the cylinder body; an air inlet and an air outlet are respectively arranged on two sides of the top of the air cylinder chamber; the cylinder of the four-stroke internal combustion engine also comprises a fixed part, a rotating part, a shifting sheet and an annular sleeve; a fixing piece is fixedly connected to one side wall of the exhaust port; the fixed part is annular, is sleeved on the exhaust valve and is in sliding connection with the exhaust valve, and a connecting groove is formed in the inner wall of the fixed part; the cross section of the connecting groove is L-shaped, and one end of the connecting groove is communicated with the bottom surface of the fixed part; the rotating piece is also annular and is in rotating connection with the connecting groove, the inner wall of the rotating piece and the outer wall of the exhaust valve are both provided with lead screw threads, the rotating piece is sleeved on the exhaust valve and is in threaded connection with the exhaust valve, and one side wall of the rotating piece, which is close to the piston, is uniformly provided with shifting pieces along the circumferential direction; the shifting piece is fixedly connected with the rotating piece; an annular sleeve is arranged on one side wall of the piston close to the exhaust port, and the piston is detachably connected with the annular sleeve;
during working, in the working process of the cylinder, impurities can be generated after the oil-gas mixture in the cylinder chamber is combusted, the impurities generated after combustion can be adhered to the exhaust valve and the inner wall of the cylinder chamber, and the impurities adhered to the exhaust valve can influence the exhaust efficiency of the cylinder and even block the exhaust port; impurities adhered to the inner wall of the cylinder chamber can increase the friction force between the piston and the inner wall of the cylinder chamber, and the increased friction force can abrade the outer side wall of the piston, so that a gap is formed between the piston and the inner wall of the cylinder chamber, the service life of the piston is influenced, and the working efficiency of the cylinder is further influenced;
therefore, the invention firstly needs to start the cylinder, the cylinder starts to make an air inlet stroke, and the piston moves from the top dead center to the bottom dead center under the drive of the crank and the connecting rod; at the moment, the air inlet is opened, the exhaust port is closed, the volume of the cylinder chamber is gradually increased in the process of moving the piston, the pressure of gas in the cylinder chamber is reduced due to the resistance of an air inlet system, a certain vacuum degree is formed in the cylinder, and the mixed gas of air and oil is sucked into the cylinder chamber through the air inlet; then the cylinder starts to perform a compression stroke, at the moment, the air inlet and the air outlet are closed simultaneously, the piston moves from the bottom dead center to the top dead center, when the piston moves upwards, the working volume is gradually reduced, and the pressure and the temperature of the mixed gas in the cylinder chamber continuously rise after being compressed; when the compression end point is reached, the cylinder starts to do work, the oil-gas mixture is ignited by the spark plug, the mixed gas is combusted to release a large amount of heat energy, the pressure and the temperature of the gas in the cylinder are rapidly increased, the high-temperature and high-pressure gas pushes the piston to move from the top dead center to the bottom dead center, the volume of the cylinder is increased along with the downward movement of the piston, and the pressure and the temperature of the gas are gradually reduced; when the lower dead point is reached again, the cylinder starts to perform an exhaust stroke, the exhaust port is opened, the air inlet is still closed, and the piston moves from the lower dead point to the upper dead point; when the exhaust valve does linear reciprocating motion, the shifting sheet attached to the outer wall of the exhaust valve can rotate to contract or expand along with the motion of the exhaust valve, so that impurities on the outer wall of the exhaust valve are removed by the shifting sheet, and loosened impurities are discharged from the exhaust port by matching with air flow in the cylinder; in addition, the linear reciprocating motion of the piston can drive the annular sleeve to perform linear reciprocating motion, so that the annular sleeve can clean impurities on the inner wall of the cylinder chamber; the impurities loosened by cleaning can vibrate and move in the cylinder chamber under the action of the piston and the airflow, and finally the impurities are discharged from the exhaust port through the matching of the shifting sheet and the airflow in the cylinder; because the annular sleeve and the shifting sheet start to work when the cylinder is started, the phenomena of continuous accumulation and caking of internal impurities are avoided;
according to the invention, through the linear reciprocating motion of the exhaust valve, the impurities on the exhaust valve are cleaned in a rotating manner by matching with the use of the rotating piece and the shifting piece, and then the impurities are discharged from the exhaust port by the airflow in the cylinder chamber, so that the exhaust valve is cleaned in time, the accumulation of the impurities on the exhaust valve is avoided, and the smoothness of the exhaust port is ensured; in addition, the annular sleeve is driven to move through the linear reciprocating motion of the piston, so that the inner wall of the cylinder chamber is cleaned, the friction between the surface of the piston and the inner wall of the cylinder chamber can be reduced, the service life of the piston is prolonged, and the working efficiency of the cylinder is improved.
Preferably, a reinforcing ring is sleeved on the outer wall of the exhaust valve; the reinforcing ring is fixedly connected with the outer wall of the shifting piece and is arranged close to the rotating piece; when the poking piece works, after the poking piece is used for a long time, the shape of the poking piece is likely to deform, and the poking piece can be connected into a whole by the arrangement of the reinforcing ring, so that the strength of the poking piece is enhanced; according to the invention, the reinforcing ring is fixedly connected to the outer wall of the shifting piece, so that the strength of the shifting piece is improved, the service life of the shifting piece is prolonged, and the impurity cleaning efficiency of the shifting piece is improved.
Preferably, the section of the shifting sheet is arc-shaped, the shifting sheet is made of elastic metal material, such as 65Mn, and the inner wall of the shifting sheet is attached to the outer wall of the exhaust valve under the elastic action of the shifting sheet; when the exhaust valve cleaning device works, the shifting piece has elasticity, and can be always attached to the outer wall of the exhaust valve in the process of linear motion of the exhaust valve, so that the cleaning efficiency of the shifting piece is further improved; due to the arc-shaped design of the shifting sheet, the outer wall of the exhaust valve is prevented from being scratched when the shifting sheet works, and impurities on the exhaust valve can be better cleaned; according to the invention, the section of the shifting sheet is limited to be arc-shaped, and the material is elastic metal material, so that the shifting sheet can be attached to the outer wall of the exhaust valve under the condition of not scratching the surface of the exhaust valve, and the impurity cleaning efficiency of the shifting sheet is further improved.
Preferably, as an embodiment of the present invention, two sliding bars are symmetrically disposed on a side wall of the piston near the exhaust port; the cross section of the sliding strip is trapezoidal; the bottom surface of the annular sleeve is symmetrically provided with two sliding grooves, the cross section shapes of the sliding grooves are the same as those of the sliding strips, and the sliding grooves are in sliding connection with the corresponding sliding strips; when the annular sleeve is mounted during working, the sliding groove on the annular sleeve is connected with the sliding strip on the surface of the piston in a sliding manner and then mounted inside the cylinder chamber, so that the annular sleeve is in close contact with the surface of the piston in the working process of the cylinder, and the annular sleeve is easy to operate when the annular sleeve needs to be continuously dismounted; the sliding strip is connected with the sliding groove in a sliding mode, so that the annular sleeve and the surface of the piston can be detached, the replacement is convenient, and the operation process is simplified.
Preferably, the outer side wall of the annular sleeve is provided with three arc-shaped grooves which are equally spaced along the axial direction of the annular sleeve; the three arc-shaped grooves are uniformly distributed along the circumferential direction of the annular sleeve, the sum of central angles corresponding to the three arc-shaped grooves is larger than 360 degrees, and arc-shaped rings are connected in the arc-shaped grooves in a sliding mode; the central angle corresponding to the arc-shaped ring is the same as that corresponding to the arc-shaped groove in size; a spring is arranged inside the arc-shaped groove; one end of each spring is fixedly connected with the bottom of the corresponding arc-shaped groove, and the other end of each spring is fixedly connected with the inner side wall of the corresponding arc-shaped ring; the outer side wall of the arc-shaped ring is attached to the inner wall of the cylinder chamber under the action of the spring; when the annular sleeve works, in the process that the annular sleeve slides along the inner wall of the cylinder chamber in a reciprocating mode, the arc-shaped ring is always in contact with the inner wall of the cylinder chamber under the action of the spring, so that the phenomenon that a gap is generated between the outer wall of the annular sleeve and the inner wall of the cylinder chamber due to abrasion of the outer wall when the annular sleeve is used for a long time is avoided, the generated gap can lead to insufficient contact between the outer wall of the annular sleeve and the inner wall of the cylinder chamber, the effect of the annular sleeve on removing impurities is influenced, and the annular sleeve always cleans the impurities on the inner wall of the cylinder chamber in the working process of the cylinder, so that the accumulation of the impurities on the inner wall of the cylinder chamber is avoided; even if the outer wall of the annular sleeve is abraded, the movement of the annular sleeve can also avoid the accumulation of impurities on the inner wall of the cylinder chamber; according to the invention, the outer wall of the arc-shaped ring is attached to the inner wall of the cylinder chamber through the acting force of the spring, so that a gap between the outer wall of the annular sleeve and the inner wall of the cylinder chamber is avoided due to abrasion of the outer wall of the annular sleeve, the service life of the annular sleeve is prolonged, and the cleaning effect of the annular sleeve is further improved.
The invention has the following beneficial effects:
1. according to the invention, through the linear reciprocating motion of the exhaust valve, the impurities on the exhaust valve are cleaned in a rotating manner by matching with the use of the rotating piece and the shifting piece, and then the impurities are discharged from the exhaust port by the airflow in the cylinder chamber, so that the exhaust valve is cleaned in time, the impurities are prevented from being accumulated on the exhaust valve, and the smoothness of the exhaust port is ensured; in addition, the annular sleeve is driven to move through the linear reciprocating motion of the piston, so that the inner wall of the cylinder chamber is cleaned, the friction between the surface of the piston and the inner wall of the cylinder chamber can be reduced, the service life of the piston is prolonged, and the working efficiency of the cylinder is improved.
2. According to the invention, the reinforcing ring is fixedly connected to the outer wall of the shifting piece, so that the strength of the shifting piece is improved, the service life of the shifting piece is prolonged, and the impurity cleaning efficiency of the shifting piece is improved.
3. According to the invention, the outer wall of the arc-shaped ring is attached to the inner wall of the cylinder chamber through the acting force of the spring, so that a gap between the outer wall of the annular sleeve and the inner wall of the cylinder chamber is avoided due to abrasion of the outer wall of the annular sleeve, the service life of the annular sleeve is prolonged, and the cleaning effect of the annular sleeve is further improved.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a cross-sectional view of the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 2 at A;
FIG. 4 is an enlarged view of a portion of FIG. 2 at B;
FIG. 5 is a perspective view of the rotary member and paddle of the present invention;
FIG. 6 is a perspective view of the annular sleeve of the present invention;
FIG. 7 is a perspective view of the piston and slide of the present invention;
in the figure: 1. a cylinder body; 101. a crank chamber; 102. a cylinder chamber; 2. an exhaust port; 3. an air inlet; 4. a spark plug; 5. an exhaust valve; 6. an intake valve; 8. a connecting rod; 9. an annular sleeve; 91. an arc-shaped slot; 92. a spring; 93. an arc-shaped ring; 94. a chute; 10. a piston; 11. a fixing member; 12. a rotating member; 13. a reinforcing ring; 14. a shifting sheet; 15. and (4) a slide bar.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in fig. 1 to 7, a cylinder for a four-stroke internal combustion engine of the present invention includes a cylinder body 1, an ignition plug 4, an intake valve 6, an exhaust valve 5, a crank, a connecting rod 8, and a piston 10; a crank chamber 101 and a cylinder chamber 102 are arranged in the cylinder body 1; an air inlet 3 and an air outlet 2 are respectively arranged on two sides of the top of the cylinder chamber 102; the cylinder of the four-stroke internal combustion engine also comprises a fixed part 11, a rotating part 12, a shifting sheet 14 and an annular sleeve 9; a fixing piece 11 is fixedly connected to one side wall of the exhaust port 2; the fixed part 11 is annular, the fixed part 11 is sleeved on the exhaust valve 5 and is in sliding connection with the exhaust valve 5, and a connecting groove is formed in the inner wall of the fixed part 11; the cross section of the connecting groove is L-shaped, and one end of the connecting groove is communicated with the bottom surface of the fixed part 11; the rotating part 12 is also annular and is in rotating connection with the connecting groove, the inner wall of the rotating part 12 and the outer wall of the exhaust valve 5 are both provided with screw threads, the rotating part 12 is sleeved on the exhaust valve 5 and is in threaded connection with the exhaust valve 5, and one side wall of the rotating part 12 close to the piston 10 is uniformly provided with poking pieces 14 along the circumferential direction; the plectrum 14 is fixedly connected with the rotating piece 12; an annular sleeve 9 is arranged on one side wall of the piston 10 close to the exhaust port 2, and the piston 10 is detachably connected with the annular sleeve 9;
during working, in the working process of the cylinder, impurities can be generated after the oil-gas mixture in the cylinder chamber 102 is combusted, the impurities generated after combustion can be adhered to the exhaust valve 5 and the inner wall of the cylinder chamber 102, and the impurities adhered to the exhaust valve 5 can influence the exhaust efficiency of the cylinder and even block the exhaust port 2; impurities adhered to the inner wall of the cylinder chamber 102 can increase the friction force between the piston 10 and the inner wall of the cylinder chamber 102, and the increase of the friction force can cause abrasion to the outer side wall of the piston 10, so that a gap is generated between the piston 10 and the inner wall of the cylinder chamber 102, the service life of the piston 10 is influenced, and the working efficiency of the cylinder is further influenced;
therefore, the invention firstly needs to start the cylinder, the cylinder starts to make an air intake stroke, and the piston 10 is driven by the crank and the connecting rod 8 to move from the top dead center to the bottom dead center; at this time, the air inlet 3 is opened, the air outlet 2 is closed, the volume of the cylinder chamber 102 is gradually increased in the process of moving the piston 10, the air pressure in the cylinder chamber 102 is reduced due to the resistance of an air inlet system, a certain vacuum degree is formed in the cylinder, and the mixed gas of air and oil is sucked into the cylinder chamber 102 through the air inlet 3; then the cylinder starts to perform a compression stroke, at the moment, the air inlet 3 and the air outlet 2 are closed simultaneously, the piston 10 moves from the bottom dead center to the top dead center, when the piston 10 moves upwards, the working volume is gradually reduced, and the pressure and the temperature of the mixed gas in the cylinder chamber 102 are continuously increased after the mixed gas is compressed; when the compression end point is reached, the cylinder starts to do work, the oil-gas mixture is ignited by the spark plug 4, the mixed gas is combusted to release a large amount of heat energy, the pressure and the temperature of the gas in the cylinder are rapidly improved, the high-temperature and high-pressure gas pushes the piston 10 to move from the top dead center to the bottom dead center, the volume of the cylinder is increased along with the downward movement of the piston 10, and the pressure and the temperature of the gas are gradually reduced; when the lower dead point is reached again, the cylinder starts to perform an exhaust stroke, the exhaust port 2 is opened, the air inlet 3 is still closed, and the piston 10 moves from the lower dead point to the upper dead point; in the process that the cylinder performs four strokes, the exhaust valve 5 makes linear reciprocating motion in the cylinder, when the exhaust valve 5 makes linear reciprocating motion, the shifting piece 14 attached to the outer wall of the exhaust valve 5 rotates to contract or expand along with the motion of the exhaust valve 5, so that impurities on the outer wall of the exhaust valve 5 are removed by the shifting piece 14, and then loosened impurities are discharged from the exhaust port 2 by matching with airflow in the cylinder; in addition, the linear reciprocating motion of the piston 10 can drive the annular sleeve 9 to perform linear reciprocating motion, so that the annular sleeve 9 can clean impurities on the inner wall of the cylinder chamber 102; the impurities loosened by cleaning can oscillate and move in the cylinder chamber 102 under the action of the piston 10 and the airflow, and finally the impurities are discharged from the exhaust port 2 through the matching of the plectrum 14 and the airflow in the cylinder; because the annular sleeve 9 and the shifting sheet 14 start to work when the cylinder is started, the phenomena of continuous accumulation and caking of internal impurities are avoided;
according to the invention, through the linear reciprocating motion of the exhaust valve 5, the impurities on the exhaust valve 5 are cleaned in a rotating way by matching with the use of the rotating piece 12 and the shifting piece 14, and then the impurities are discharged from the exhaust port 2 by the airflow in the cylinder chamber 102, so that the exhaust valve 5 is cleaned in time, the accumulation of the impurities on the exhaust valve 5 is avoided, and the smoothness of the exhaust port 2 is ensured; in addition, the annular sleeve 9 is driven to move by the linear reciprocating motion of the piston 10, so that the inner wall of the cylinder chamber 102 is cleaned, the friction between the surface of the piston 10 and the inner wall of the cylinder chamber 102 can be reduced, the service life of the piston 10 is prolonged, and the working efficiency of the cylinder is improved.
As an embodiment of the invention, the outer wall of the exhaust valve 5 is sleeved with a reinforcing ring 13; the reinforcing ring 13 is fixedly connected with the outer wall of the plectrum 14, and the reinforcing ring 13 is arranged close to the rotating piece 12; during operation, after the shifting piece 14 is used for a long time, the shape of the shifting piece 14 may deform, and the arrangement of the reinforcing ring 13 can connect the shifting piece 14 into a whole, so that the strength of the shifting piece 14 is enhanced; according to the invention, the reinforcing ring 13 is fixedly connected to the outer wall of the shifting piece 14, so that the strength of the shifting piece 14 is improved, the service life of the shifting piece 14 is prolonged, and the impurity cleaning efficiency of the shifting piece 14 is improved.
As an embodiment of the present invention, the section of the pick-up 14 is arc-shaped, the pick-up 14 is made of elastic metal material, such as 65Mn, and the inner wall of the pick-up 14 is attached to the outer wall of the exhaust valve 5 under the elastic action of the pick-up 14; when the exhaust valve cleaning device works, the poking piece 14 has elasticity, so that the poking piece 14 can be always attached to the outer wall of the exhaust valve 5 in the process that the exhaust valve 5 makes linear motion, and the cleaning efficiency of the poking piece 14 is further improved; the arc-shaped design of the shifting sheet 14 not only prevents the shifting sheet 14 from scratching the outer wall of the exhaust valve 5 during working, but also can better clean impurities on the exhaust valve 5; according to the invention, the section of the shifting sheet 14 is limited to be arc-shaped, and the material is the elastic metal material, so that the shifting sheet 14 can be attached to the outer wall of the exhaust valve 5 under the condition of not scratching the surface of the exhaust valve 5, and the impurity cleaning efficiency of the shifting sheet 14 is further improved.
As an embodiment of the present invention, two sliding bars 15 are symmetrically disposed on a side wall of the piston 10 near the exhaust port 2; the cross section of the slide bar 15 is trapezoidal; the bottom surface of the annular sleeve 9 is symmetrically provided with two sliding grooves 94, the cross section shapes of the sliding grooves 94 are the same as that of the sliding strips 15, and the sliding grooves 94 are in sliding connection with the corresponding sliding strips 15; during operation, when the annular sleeve 9 is installed, the sliding groove 94 on the annular sleeve 9 is connected with the sliding strip 15 on the surface of the piston 10 in a sliding manner, and then the annular sleeve 9 is installed inside the cylinder chamber 102, so that the annular sleeve 9 is in close contact with the surface of the piston 10 in the cylinder operation process, and the operation is easy when the annular sleeve 9 needs to be continuously disassembled and assembled; the sliding connection between the sliding strip 15 and the sliding groove 94 realizes the disassembly of the annular sleeve 9 and the surface of the piston 10, is convenient to replace, and simplifies the operation process.
As an embodiment of the present invention, the outer side wall of the annular sleeve 9 is provided with three arc-shaped grooves 91 equally spaced along the axial direction of the annular sleeve 9; the three arc-shaped grooves 91 are uniformly distributed along the circumferential direction of the annular sleeve 9, the sum of central angles corresponding to the three arc-shaped grooves 91 is larger than 360 degrees, and arc-shaped rings 93 are slidably connected in the arc-shaped grooves 91; the central angle corresponding to the arc-shaped ring 93 is the same as the central angle corresponding to the arc-shaped groove 91; a spring 92 is arranged in the arc-shaped groove 91; one end of each spring 92 is fixedly connected with the bottom of the corresponding arc-shaped groove 91, and the other end of each spring is fixedly connected with the inner side wall of the corresponding arc-shaped ring 93; the outer side wall of the arc-shaped ring 93 is attached to the inner wall of the cylinder chamber 102 under the action of the spring 92; when the annular sleeve 9 slides along the inner wall of the cylinder chamber 102 in a reciprocating manner, the arc-shaped ring 93 is always in contact with the inner wall of the cylinder chamber 102 under the action of the spring 92, so that the phenomenon that the outer wall of the annular sleeve 9 is not in sufficient contact with the inner wall of the cylinder chamber 102 due to the fact that the annular sleeve 9 is used for a long time and a gap is generated between the outer wall of the annular sleeve 9 and the inner wall of the cylinder chamber 102 due to abrasion of the outer wall is avoided, and the effect of the annular sleeve 9 for removing impurities is influenced; because the annular sleeve 9 always cleans impurities on the inner wall of the cylinder chamber 102 in the working process of the cylinder, the accumulation of the impurities on the inner wall of the cylinder chamber 102 is avoided; even if the outer wall of the annular sleeve 9 is worn, the movement of the annular sleeve 9 prevents the accumulation of impurities on the inner wall of the cylinder chamber 102; according to the invention, the outer wall of the arc-shaped ring 93 is attached to the inner wall of the cylinder chamber 102 through the acting force of the spring 92, so that a gap between the outer wall of the annular sleeve 9 and the inner wall of the cylinder chamber 102 due to abrasion is avoided, the service life of the annular sleeve 9 is prolonged, and the cleaning effect of the annular sleeve 9 is further improved.
The specific working process is as follows:
when the air compressor works, firstly, the air cylinder needs to be started, the air cylinder starts to perform an air inlet stroke, and the piston 10 is driven by the crank and the connecting rod 8 to move from the top dead center to the bottom dead center; at this time, the air inlet 3 is opened, the air outlet 2 is closed, the volume of the cylinder chamber 102 is gradually increased in the process of moving the piston 10, the air pressure in the cylinder chamber 102 is reduced due to the resistance of an air inlet system, a certain vacuum degree is formed in the cylinder, and the mixed gas of air and oil is sucked into the cylinder chamber 102 through the air inlet 3; then the cylinder starts to perform a compression stroke, at the moment, the air inlet 3 and the air outlet 2 are closed simultaneously, the piston 10 moves from the bottom dead center to the top dead center, when the piston 10 moves upwards, the working volume is gradually reduced, and the pressure and the temperature of the mixed gas in the cylinder chamber 102 are continuously increased after the mixed gas is compressed; when the compression end point is reached, the cylinder starts to do work, the oil-gas mixture is ignited by the spark plug 4, the mixed gas is combusted to release a large amount of heat energy, the pressure and the temperature of the gas in the cylinder are rapidly improved, the high-temperature and high-pressure gas pushes the piston 10 to move from the top dead center to the bottom dead center, the volume of the cylinder is increased along with the downward movement of the piston 10, and the pressure and the temperature of the gas are gradually reduced; when the lower dead point is reached again, the cylinder starts to perform an exhaust stroke, the exhaust port 2 is opened, the air inlet 3 is still closed, and the piston 10 moves from the lower dead point to the upper dead point; in the process that the cylinder performs four strokes, the exhaust valve 5 makes linear reciprocating motion in the cylinder, the linear reciprocating motion of the exhaust valve 5 further drives the rotating piece 12 to rotate through the transmission of the screw threads of the lead screw, and the rotation of the rotating piece 12 further drives the shifting piece 14 to be attached to impurities on the outer wall of the exhaust valve 5 to perform rotary cleaning; in addition, the linear reciprocating motion of the piston 10 can drive the annular sleeve 9 to perform linear reciprocating motion, and the linear reciprocating motion of the annular sleeve 9 can finish the cleaning of impurities on the inner wall of the cylinder chamber 102; because the annular sleeve 9 starts to work when the cylinder is started, the impurities inside are continuously cleaned, and the impurities after being cleaned and loosened are sent to the exhaust port 2 under the action of the airflow inside the piston 10 so as to be discharged from the exhaust port 2; after the shifting piece 14 is used for a long time, the shape of the shifting piece 14 is likely to deform, and the arrangement of the reinforcing ring 13 can connect the shifting piece 14 into a whole, so that the strength of the shifting piece 14 is enhanced; the shifting piece 14 has elasticity, so that the shifting piece 14 can be always attached to the outer wall of the exhaust valve 5 in the process that the exhaust valve 5 makes linear motion, and the cleaning efficiency of the shifting piece 14 is further improved; the arc-shaped design of the shifting sheet 14 avoids the outer wall of the exhaust valve 5 from being scratched by the shifting sheet 14 in work; when the annular sleeve 9 is installed, the sliding groove 94 on the annular sleeve 9 is connected with the sliding strip 15 on the surface of the piston 10 in a sliding manner, and then the annular sleeve 9 is installed inside the cylinder chamber 102, so that the annular sleeve 9 is in close contact with the surface of the piston 10 in the working process of the cylinder, and the assembly and disassembly are convenient; in the process that the annular sleeve 9 slides back and forth along the inner wall of the cylinder chamber 102, the arc-shaped ring 93 is always in contact with the inner wall of the cylinder chamber 102 under the action of the spring 92, so that the phenomenon that a gap is generated between the annular sleeve 9 and the inner wall of the cylinder chamber 102 due to abrasion of the outer wall when the annular sleeve is used for a long time is avoided.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (6)

1. A four-stroke internal combustion engine cylinder comprises a cylinder body (1), a spark plug (4), an inlet valve (6), an exhaust valve (5), a crank, a connecting rod (8) and a piston (10); a crank chamber (101) and a cylinder chamber (102) are arranged in the cylinder body (1); an air inlet (3) and an air outlet (2) are respectively arranged on two sides of the top of the air cylinder chamber (102); the method is characterized in that: the cylinder of the four-stroke internal combustion engine also comprises a fixed piece (11), a rotating piece (12), a shifting sheet (14) and an annular sleeve (9); a fixing piece (11) is fixedly connected to one side wall of the exhaust port (2); the fixed part (11) is annular, the fixed part (11) is sleeved on the exhaust valve (5) and is in sliding connection with the exhaust valve (5), and the fixed part (11) is rotationally connected with the rotating part (12) on one side wall facing the piston (10); the shape of the rotating piece (12) is also annular, lead screw threads are arranged on the inner wall of the rotating piece (12) and the outer wall of the exhaust valve (5), the rotating piece (12) is sleeved on the exhaust valve (5) and is in threaded connection with the exhaust valve (5), and a shifting piece (14) is uniformly arranged on one side wall, close to the piston (10), of the rotating piece (12) along the circumferential direction; the plectrum (14) is fixedly connected with the rotating piece (12); an annular sleeve (9) is arranged on one side wall of the piston (10) close to the air outlet, and the piston (10) is detachably connected with the annular sleeve (9).
2. A cylinder for a four-stroke internal combustion engine as recited in claim 1, wherein: a reinforcing ring (13) is sleeved on the outer wall of the exhaust valve (5); the reinforcing ring (13) is fixedly connected with the outer wall of the shifting piece (14), and the reinforcing ring (13) is arranged close to the rotating piece (12).
3. A cylinder for a four-stroke internal combustion engine as claimed in claim 2 wherein: the section of the shifting sheet (14) is arc-shaped, the shifting sheet (14) is made of elastic metal materials, and the inner wall of the shifting sheet (14) is attached to the outer wall of the exhaust valve (5) under the elastic action of the shifting sheet (14).
4. A cylinder for a four-stroke internal combustion engine as claimed in claim 3 wherein: two sliding strips (15) are symmetrically arranged on one side wall of the piston (10) close to the air outlet; the cross section of the sliding strip (15) is trapezoidal; the bottom surface of the annular sleeve (9) is symmetrically provided with two sliding grooves (94), the cross section shapes of the sliding grooves (94) are the same as that of the sliding strips (15), and the sliding grooves (94) are in sliding connection with the corresponding sliding strips (15).
5. A cylinder for a four-stroke internal combustion engine as claimed in claim 4 wherein: an arc-shaped groove (91) is formed in the outer side wall of the annular sleeve (9); an arc ring (93) is connected in the arc groove (91) in a sliding way; a spring (92) is arranged inside the arc-shaped groove (91); one end of each spring (92) is fixedly connected with the bottom of the corresponding arc-shaped groove (91), and the other end of each spring is fixedly connected with the inner side wall of the corresponding arc-shaped ring (93); the outer side wall of the arc-shaped ring (93) is attached to the inner wall of the cylinder chamber (102) under the action of the spring (92).
6. A cylinder for a four-stroke internal combustion engine as claimed in claim 5 wherein: the number of the arc-shaped grooves (91) is at least two, the arc-shaped grooves (91) are arranged at equal intervals along the axial direction of the annular sleeve (9), and are uniformly distributed along the circumferential direction of the annular sleeve (9); the sum of the central angles of the arc-shaped grooves (91) is more than 360 degrees; the central angle corresponding to the arc-shaped ring (93) is the same as the central angle corresponding to the arc-shaped groove (91).
CN202110543729.3A 2021-05-19 2021-05-19 Cylinder of four-stroke internal combustion engine Active CN113339154B (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0634101U (en) * 1992-10-07 1994-05-06 日産ディーゼル工業株式会社 Engine intake and exhaust valves
KR20010065985A (en) * 1999-12-31 2001-07-11 이계안 Deposit elimination device of exhaust valve stem
JP2013072346A (en) * 2011-09-27 2013-04-22 Bando Kiko Co Ltd Reciprocating engine
CN203335164U (en) * 2013-05-20 2013-12-11 常州中科星龙线缆有限公司 Diesel engine exhaust valve
CN208605289U (en) * 2018-06-04 2019-03-15 重庆万斯特汽车零部件有限公司 A kind of gas cylinder sleeve of crack resistence
CN210178481U (en) * 2019-07-25 2020-03-24 浙江中平粉末冶金有限公司 Frequency conversion semi-precision piston mechanism

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0634101U (en) * 1992-10-07 1994-05-06 日産ディーゼル工業株式会社 Engine intake and exhaust valves
KR20010065985A (en) * 1999-12-31 2001-07-11 이계안 Deposit elimination device of exhaust valve stem
JP2013072346A (en) * 2011-09-27 2013-04-22 Bando Kiko Co Ltd Reciprocating engine
CN203335164U (en) * 2013-05-20 2013-12-11 常州中科星龙线缆有限公司 Diesel engine exhaust valve
CN208605289U (en) * 2018-06-04 2019-03-15 重庆万斯特汽车零部件有限公司 A kind of gas cylinder sleeve of crack resistence
CN210178481U (en) * 2019-07-25 2020-03-24 浙江中平粉末冶金有限公司 Frequency conversion semi-precision piston mechanism

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