CN113074042A - Four-stroke engine - Google Patents

Four-stroke engine Download PDF

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Publication number
CN113074042A
CN113074042A CN202110432113.9A CN202110432113A CN113074042A CN 113074042 A CN113074042 A CN 113074042A CN 202110432113 A CN202110432113 A CN 202110432113A CN 113074042 A CN113074042 A CN 113074042A
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CN
China
Prior art keywords
combustion chamber
air inlet
piston
exhaust
stroke
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Pending
Application number
CN202110432113.9A
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Chinese (zh)
Inventor
邱文化
Original Assignee
邱文化
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Priority to CN202110432113.9A priority Critical patent/CN113074042A/en
Publication of CN113074042A publication Critical patent/CN113074042A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B23/00Other engines characterised by special shape or construction of combustion chambers to improve operation
    • F02B23/08Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition
    • F02B23/10Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition with separate admission of air and fuel into cylinder
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02Valve drive
    • F01L1/026Gear drive
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02FCYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00Cylinders; Cylinder heads 
    • F02F1/18Other cylinders
    • F02F1/22Other cylinders characterised by having ports in cylinder wall for scavenging or charging
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02FCYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F3/00Pistons 
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/10Internal combustion engine [ICE] based vehicles
    • Y02T10/12Improving ICE efficiencies

Abstract

The invention discloses a four-stroke engine, which comprises a cylinder body, wherein a working cavity is arranged in the cylinder body, a piston which can slide along the inner wall of the working cavity and divides the working cavity into a first combustion chamber and a second combustion chamber is arranged in the working cavity, a first air inlet and a first exhaust port are arranged on the side wall of the first combustion chamber, a second air inlet and a second exhaust port are arranged on the side wall of the second combustion chamber, an air inlet valve is arranged at each of the first air inlet and the second air inlet and is communicated with a fuel tank, exhaust valves controlled to be switched by an exhaust assembly are arranged at each of the first exhaust port and the second exhaust port, and at least one spark plug is arranged in each of the first combustion chamber and the second combustion chamber. The invention is not only environment-friendly, but also has high working efficiency.

Description

Four-stroke engine
Technical Field
The invention relates to the technical field of engines. More particularly, the present invention relates to a four-stroke engine.
Background
Two-stroke engines and four-stroke engines are commonly used at present. The two-stroke engine has simple and light structure, takes gas in a scavenging mode, but because the two-stroke engine burns engine oil, is not sufficient in combustion and has large pollution to the environment, the two-stroke engine is not common on other equipment except chain saws, boats and special equipment; the four-stroke engine is heavy in weight and low in power-to-weight ratio, and only once work is done by four strokes, so that the requirements of people on light, strong and instantaneous acceleration functions of vehicles such as motorcycles, automobiles and the like cannot be met.
Disclosure of Invention
An object of the present invention is to solve at least the above problems and to provide at least the advantages described later.
The invention also aims to provide a four-stroke engine, which is characterized in that two combustion chambers are arranged in the working chamber, an inlet valve, an outlet valve and a spark plug are respectively arranged in the combustion chambers, and mixed gas in the two combustion chambers is combusted at intervals to respectively apply work to the piston to realize the reciprocating movement of the piston in the working chamber, so that the effect of increasing the power of the engine by applying work twice in four strokes on the basis of environmental protection is achieved.
To achieve these objects and other advantages and in accordance with the purpose of the invention, a four-stroke engine is provided, comprising:
the cylinder body is internally provided with a work doing cavity, a piston which can slide along the inner wall of the work doing cavity and divides the work doing cavity into a first combustion chamber and a second combustion chamber is arranged in the work doing cavity, the side wall of the first combustion chamber is provided with a first air inlet and a first exhaust port, the side wall of the second combustion chamber is provided with a second air inlet and a second exhaust port, the first air inlet and the second air inlet are respectively provided with an air inlet valve and are respectively communicated with a fuel tank, the first exhaust port and the second exhaust port are respectively provided with an exhaust valve controlled to be switched by an exhaust assembly, and the first combustion chamber and the second combustion chamber are respectively internally provided with at least one spark plug.
Preferably, in the four-stroke engine, the working stroke of the engine comprises a first a-stroke, a first B-stroke, a second a-stroke and a second B-stroke;
when the piston reaches the moving end point of the second combustion chamber, the exhaust valve at the first exhaust port is opened, and the exhaust valve at the second exhaust port is closed; performing a first B stroke, moving the piston to the direction of the first combustion chamber, closing an air inlet valve at a first air inlet, opening an air inlet valve at a second air inlet, enabling mixed gas to enter the second combustion chamber through the second air inlet, simultaneously discharging waste gas in the first combustion chamber through a first exhaust port by the piston, and closing an exhaust valve at a first exhaust port and closing an exhaust valve at a second exhaust port when the piston reaches the moving end point of the first combustion chamber; performing a second A stroke, moving the piston to the direction of the second combustion chamber, opening an air inlet valve at the first air inlet, closing an air inlet valve at the second air inlet, enabling the mixed gas to enter the first combustion chamber through the first air inlet, moving the piston to the direction of the second combustion chamber and compressing the mixed gas in the second combustion chamber, and closing an exhaust valve at the first exhaust port and an exhaust valve at the second exhaust port when the piston reaches the moving end point of the second combustion chamber; and (3) carrying out a second B stroke, igniting the spark plug in the second combustion chamber, burning the mixed gas in the second combustion chamber to do work to push the piston to move towards the first combustion chamber and compress the mixed gas in the first combustion chamber, closing the air inlet valve at the first air inlet and closing the air inlet valve at the second air inlet, and igniting the spark plug in the first combustion chamber to enter the next working cycle when the piston reaches the moving end point of the first combustion chamber.
Preferably, in the four-stroke engine, a power conversion cavity and an engine shaft are further arranged in the cylinder body, a power conversion assembly is arranged in the power conversion cavity, one end of the engine shaft penetrates through a through hole in the middle of the piston and is fixedly connected with the piston, and the other end of the engine shaft is located in the power conversion cavity, is movably connected with the power conversion assembly and drives the power conversion assembly to operate.
Preferably, in the four-stroke engine, a movable cavity is further arranged in the cylinder body, the working cavity is located between the movable cavity and the power conversion cavity, lubricating oil is arranged in the movable cavity and the power conversion cavity, one end of the engine shaft is located in the movable cavity, and both ends of the engine shaft are submerged by the lubricating oil;
one end of the engine shaft is provided with an oil port A which extends from the oil port A to the depth of the oil port A to the piston to form a second oil passage A, and the other end of the engine shaft is provided with an oil port B which extends from the oil port B to the depth of the oil port B to the piston to form a second oil passage B;
the piston periphery is provided with the recess, in the piston recess both sides be provided with respectively all with first A oil duct and first B oil duct of recess intercommunication, first A oil duct with second A oil duct butt joint intercommunication, first B oil duct with second B oil duct butt joint intercommunication.
Preferably, in the four-stroke engine, the cylinder inner cavity is divided into the movable cavity, the working cavity and the power conversion cavity by two partition plates, and the engine shaft is slidably connected with the two partition plates through sliding bearings.
Preferably, in the four-stroke engine, the working chamber, the piston, and the engine shaft are all cylindrical.
Preferably, in the four-stroke engine, the groove is an annular groove.
Preferably, in the four-stroke engine, both ends of the piston are provided with an air seal ring and an oil seal ring.
Preferably, in the four-stroke engine, the power conversion assembly includes:
one end of the connecting rod is hinged with the other end of the engine shaft;
and a connecting rod journal of the crankshaft is movably connected with the other end of the connecting rod and can rotate around the axis of a main shaft of the crankshaft, and the main shaft is connected with a mechanical structure outside the cylinder body.
Preferably, in the four-stroke engine, the exhaust assembly includes:
a cam shaft arranged on the cylinder body, a cam arranged on the cam shaft and abutted against the exhaust valve to control the opening and closing of the exhaust valve, an exhaust gear arranged at one end of the cam shaft,
the driving gear is arranged on the main shaft and is driven by the main shaft to rotate;
and a tension wheel which is arranged on the cylinder body, is positioned between the driving gear and the exhaust gear and is close to the exhaust gear, and the driving gear, the tension wheel and the exhaust gear are connected through a connecting belt.
The invention at least comprises the following beneficial effects: the four-stroke engine is provided with two combustion chambers in one cylinder body, mixed gas in each combustion chamber can do work on the piston, so that the piston is accelerated instantaneously when reciprocating between the two combustion chambers; compared with the common four-stroke engine, the four-stroke engine can do work twice in four strokes as the two-stroke engine, the power is doubled in the same volume and rotating speed of a working cavity, the working efficiency is higher, and compared with the defects of insufficient combustion and oil burning of the two-stroke engine, the four-stroke engine can achieve the environment-friendly effect as the four-stroke engine.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a schematic view of the internal structure of a four-stroke engine according to the present invention;
FIG. 2 is a schematic diagram of the lubrication system of the four-stroke engine of the present invention;
FIG. 3 is a schematic view of the exhaust gear operation of the four-stroke engine of the present invention;
wherein, 1-a movable cavity, 2-an engine shaft, 3-a sliding bearing, 4-a first exhaust port, 5-a piston, 6-a groove, 7-an oil seal ring, 8-an air seal ring, 9-an exhaust valve, 10-a camshaft, 11-a cam, 12-a second exhaust port, 13-a power conversion cavity, 14-a connecting rod, 15-a main shaft, 16-a crankshaft, 17-a spark plug, 18-a second inlet port, 19-an inlet valve, 20-a power cavity, 21-a first inlet port, 22-a fuel tank, 23-a oil port, 24-a second oil channel, 25-a first oil channel, 26-B oil port, 27-a second oil channel, 28-a first B oil channel, 29-a connecting band, 30-an exhaust gear, 31-tension wheel, 32-driving gear.
Detailed Description
The present invention is further described in detail below with reference to the drawings and the detailed description so that those skilled in the art can practice the invention with reference to the description.
It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
It is to be noted that the experimental methods described in the following embodiments are all conventional methods unless otherwise specified, and the reagents and materials, if not otherwise specified, are commercially available; in the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can, for example, be fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. The terms "lateral," "longitudinal," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.
In one aspect, as shown in fig. 1, the present invention provides a four-stroke engine, including:
the cylinder body is internally provided with a work doing cavity 20, a piston 5 which can slide along the inner wall of the work doing cavity 20 and divides the work doing cavity into a first combustion chamber and a second combustion chamber is arranged in the work doing cavity 20, a first air inlet 21 and a first exhaust port 4 are arranged on the side wall of the first combustion chamber, a second air inlet 18 and a second exhaust port 12 are arranged on the side wall of the second combustion chamber, an air inlet valve 19 is arranged at each of the first air inlet 21 and the second air inlet 18 and communicated with a fuel tank 22, exhaust valves 9 controlled to be switched by an exhaust assembly are arranged at each of the first exhaust port 4 and the second exhaust port 12, and at least one spark plug 17 is arranged in each of the first combustion chamber and the second combustion chamber.
The cylinder body of the four-stroke engine provided by the technical scheme is internally provided with a working cavity 20, a piston 5 is arranged in the working cavity 20, the piston 5 can slide along the inner wall of the working cavity 20 and divide the working cavity 20 into a first combustion chamber and a second combustion chamber, the side wall of the working cavity 20 is provided with a first air inlet 21, a first exhaust port 4, a second air inlet 18 and a second exhaust port 12, wherein the first air inlet 21 and the first exhaust port 4 are used for feeding fuel or exhausting waste gas out of the first combustion chamber corresponding to the position of the first combustion chamber, the second air inlet 18 and the second exhaust port 12 are used for feeding fuel or exhausting waste gas out of the second combustion chamber corresponding to the position of the second combustion chamber, a fuel tank 22 is connected with the first air inlet 21 and the second air inlet 18 through oil pipes and is respectively communicated with the first combustion chamber and the second combustion chamber, the fuel in the fuel tank can be diesel oil, gasoline, natural gas and the like commonly used by the engine or a plurality of, the first air inlet 21 and the second air inlet 18 are provided with air inlet valves 19 for blocking the air inlet valves, the air inlet valves can be one-way valves, the air inlet valves are opened through negative pressure generated in the first combustion chamber or the second combustion chamber, mixed gas can only enter the first combustion chamber or the second combustion chamber from a fuel tank, the first exhaust port 4 and the second exhaust port 12 are provided with exhaust valves 9 for blocking the air inlet valves, the exhaust valves 9 are controlled to be opened and closed by an exhaust assembly, so that waste gas in the first combustion chamber and the second combustion chamber can be exhausted, the first combustion chamber and the second combustion chamber are internally provided with spark plugs 17 for igniting the mixed gas, and a plurality of spark plugs can be arranged for improving the ignition effect.
The working stroke of the four-stroke engine provided by the technical scheme comprises four strokes: first a-stroke, first B-stroke, second a-stroke, and second B-stroke:
when the first stroke A is carried out, the exhaust valve at the first exhaust port 4 is opened, the exhaust valve at the second exhaust port 12 is opened, the spark plug in the first combustion chamber is ignited, the mixed gas in the first combustion chamber is combusted and does work to push the piston 5 to move towards the direction of the second combustion chamber, and the residual waste gas in the second combustion chamber is exhausted through the second exhaust port 12;
performing a first B stroke, wherein the piston 5 moves towards the first combustion chamber, the air inlet valve at the first air inlet 21 is closed, negative pressure is formed in the second combustion chamber to open the air inlet valve at the second air inlet 18, the mixed gas enters the second combustion chamber through the second air inlet 18, meanwhile, the piston 5 discharges waste gas in the first combustion chamber through the first exhaust port 4, and when the piston 5 reaches the moving end point of the first combustion chamber, the exhaust valve at the first exhaust port 4 is closed, and the exhaust valve at the second exhaust port 12 is closed;
performing a second stroke A, moving the piston 5 towards the second combustion chamber, forming negative pressure in the first combustion chamber to open an air inlet valve at the first air inlet 21 and close an air inlet valve at the second air inlet 18, enabling the mixed gas to enter the first combustion chamber through the first air inlet 21, moving the piston 5 towards the second combustion chamber and compressing the mixed gas in the second combustion chamber, and when the piston 5 reaches the moving end point of the second combustion chamber, closing an exhaust valve at the first exhaust port 4 and closing an exhaust valve at the second exhaust port 12;
and (3) performing a second B stroke, igniting the spark plug in the second combustion chamber, burning the mixed gas in the second combustion chamber to do work to push the piston 5 to move towards the first combustion chamber and compress the mixed gas in the first combustion chamber, closing an air inlet valve at the first air inlet 21 and closing an air inlet valve at the second air inlet 18, and when the piston 5 reaches the moving end point of the first combustion chamber, completing compression of the mixed gas in the first combustion chamber and igniting the spark plug in the first combustion chamber to enter the next working cycle.
The invention at least comprises the following beneficial effects: the four-stroke engine is provided with two combustion chambers in one cylinder body, mixed gas in each combustion chamber can do work on the piston, so that the piston is accelerated instantaneously when reciprocating between the two combustion chambers; the four-stroke engine is environment-friendly, and the four strokes do work twice, so that the working efficiency is higher.
In another technical solution, as shown in fig. 1, in the four-stroke engine, a power conversion cavity 13 and an engine shaft 2 are further disposed in the cylinder, a power conversion assembly is disposed in the power conversion cavity 13, one end of the engine shaft 2 passes through a through hole in the middle of the piston 5 and is fixedly connected with the piston 5, and the other end of the engine shaft is located in the power conversion cavity 13 and is movably connected with the power conversion assembly and drives the power conversion assembly to operate. The piston moves to drive the engine shaft to move so as to drive the power conversion assembly to operate. The power conversion cavity and the working cavity are separately arranged, so that the working process and the main power conversion process of the engine are separately carried out without mutual interference.
In another technical solution, as shown in fig. 1 and 2, in the four-stroke engine, a movable cavity 1 is further provided in the cylinder, the working cavity 20 is located between the movable cavity 1 and the power conversion cavity 13, lubricating oil is provided in both the movable cavity 1 and the power conversion cavity 13, one end of the engine shaft 2 is located in the movable cavity 1, and both ends of the engine shaft 2 are submerged by the lubricating oil;
one end of the engine shaft 2 is provided with an oil port a 23, and extends from the oil port a 23 to the depth of the oil port a to the piston to form a second oil passage a 24, and the other end of the engine shaft is provided with an oil port B26, and extends from the oil port B26 to the depth of the oil port B to form a second oil passage B27;
the periphery of the piston 5 is provided with a groove 6, a first oil duct A25 and a first oil duct B28 which are communicated with the groove 6 are respectively arranged on two sides of the groove 6 in the piston 5, the first oil duct A25 is communicated with the second oil duct A24 in a butt joint mode, and the first oil duct B28 is communicated with the second oil duct B27 in a butt joint mode.
The movable cavity and the power conversion cavity are used for storing lubricating oil; the lubricating channel formed by the oil port A of the engine shaft, the second oil duct A, the first oil duct A, the groove, the first oil duct B, the second oil duct B and the oil port B of the engine shaft is communicated with the movable cavity and the power conversion cavity, so that lubricating oil can reach the groove from the two cavities and then permeate the periphery of the piston to lubricate the piston; lubricating oil in the power conversion cavity can also lubricate the power conversion assembly; the flowing power of the lubricating oil is that when the engine moves towards the movable cavity or the power conversion cavity, the lubricating oil occupies the space in the two cavities, so that the lubricating oil in the two cavities is extruded into the lubricating channel, and the reciprocating motion of the engine shaft enables the lubricating oil to flow between the movable cavity and the power conversion cavity.
In another technical solution, as shown in fig. 1, in the four-stroke engine, the cylinder inner cavity is divided into the movable cavity 1, the working cavity 20 and the power conversion cavity 13 by two partition plates, and the engine shaft 2 is slidably connected with the two partition plates by a sliding bearing 3. The sliding bearing is used for supporting and connecting the engine shaft and the two partition plates, the air tightness is good, and lubricating oil cannot enter the first combustion chamber and the second combustion chamber from the movable cavity and the power conversion cavity in the moving process of the engine shaft.
In another technical solution, in the four-stroke engine, the working chamber 20, the piston 5, and the engine shaft 2 are all cylindrical. The working cavity, the piston and the engine shaft are all cylindrical and coaxially arranged, so that the working cavity, the piston and the engine shaft are uniformly stressed, the working efficiency is high, and the engine shaft is not easy to damage.
In another aspect, in the four-stroke engine, the groove is an annular groove. The recess encircles the setting of piston periphery, enables lubricating oil along the more even quick infiltration recess periphery of recess and the gap between doing work chamber, improves lubricated effect.
In another technical solution, as shown in fig. 1, in the four-stroke engine, both ends of the piston 5 are provided with an air seal ring 8 and an oil seal ring 7. The lubricating oil is kept between the piston and the inner wall of the working cavity and cannot flow into the combustion chamber.
In another aspect, as shown in fig. 1, in the four-stroke engine, the power conversion assembly includes:
a connecting rod 14, one end of which is hinged with the other end of the engine shaft 2;
and a crankshaft 16, the connecting rod journal of which is movably connected with the other end of the connecting rod 14 and can rotate around the axle center of a main shaft 15 of the crankshaft, and the main shaft 15 is connected with a mechanical structure outside the cylinder body. The engine shaft moves to drive the connecting rod to move so as to drive the crankshaft to rotate around the axis of the main shaft of the crankshaft, and the main shaft rotates to drive the mechanical structure outside the cylinder body to operate to complete mechanical motion.
In another aspect, as shown in fig. 1 and 3, in the four-stroke engine, the exhaust assembly includes:
a camshaft 10 arranged on the cylinder body, a cam 11 arranged on the camshaft 10, the cam 11 abutting against the exhaust valve 9 to control the opening and closing of the exhaust valve 9, an exhaust gear 30 arranged at one end of the camshaft 10,
a drive gear 32 provided on the main shaft 15 and rotated by the main shaft 15;
and a tension pulley 31 provided in the cylinder between the drive gear 32 and the exhaust gear 30 and adjacent to the exhaust gear 30, wherein the drive gear 32, the tension pulley 31, and the exhaust gear 30 are connected by a connecting belt 29. The connecting belt can be a toothed belt, a chain and the like. The main shaft of the crankshaft rotates to drive the driving gear to rotate, the connecting belt is pulled to move, the exhaust gear is further made to rotate, the exhaust gear drives the cam shaft to rotate, the cam is made to rotate to control the opening or closing of the exhaust valve, when the salient point of the cam is in contact with the exhaust valve, the exhaust valve is opened, and otherwise, the exhaust valve is closed. The take-up pulley is used for supporting the connecting band and can prevent that the connecting band from becoming flexible.
The number of apparatuses and the scale of the process described herein are intended to simplify the description of the present invention. Applications, modifications and variations of the present invention will be apparent to those skilled in the art.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable to various fields of endeavor for which the invention may be embodied with additional modifications as would be readily apparent to those skilled in the art, and the invention is therefore not limited to the details shown and described herein without departing from the generic concept as defined by the claims and their equivalents.

Claims (10)

1. A four-stroke engine, comprising:
the cylinder body is internally provided with a work doing cavity, a piston which can slide along the inner wall of the work doing cavity and divides the work doing cavity into a first combustion chamber and a second combustion chamber is arranged in the work doing cavity, the side wall of the first combustion chamber is provided with a first air inlet and a first exhaust port, the side wall of the second combustion chamber is provided with a second air inlet and a second exhaust port, the first air inlet and the second air inlet are respectively provided with an air inlet valve and are respectively communicated with a fuel tank, the first exhaust port and the second exhaust port are respectively provided with an exhaust valve controlled to be switched by an exhaust assembly, and the first combustion chamber and the second combustion chamber are respectively internally provided with at least one spark plug.
2. The four-stroke engine according to claim 1, wherein the working stroke of the engine includes a first a-stroke, a first B-stroke, a second a-stroke, and a second B-stroke;
when the piston reaches the moving end point of the second combustion chamber, the exhaust valve at the first exhaust port is opened, and the exhaust valve at the second exhaust port is closed; performing a first B stroke, moving the piston to the direction of the first combustion chamber, closing an air inlet valve at a first air inlet, opening an air inlet valve at a second air inlet, enabling mixed gas to enter the second combustion chamber through the second air inlet, simultaneously discharging waste gas in the first combustion chamber through a first exhaust port by the piston, and closing an exhaust valve at a first exhaust port and closing an exhaust valve at a second exhaust port when the piston reaches the moving end point of the first combustion chamber; performing a second A stroke, moving the piston to the direction of the second combustion chamber, opening an air inlet valve at the first air inlet, closing an air inlet valve at the second air inlet, enabling the mixed gas to enter the first combustion chamber through the first air inlet, moving the piston to the direction of the second combustion chamber and compressing the mixed gas in the second combustion chamber, and closing an exhaust valve at the first exhaust port and an exhaust valve at the second exhaust port when the piston reaches the moving end point of the second combustion chamber; and (3) carrying out a second B stroke, igniting the spark plug in the second combustion chamber, burning the mixed gas in the second combustion chamber to do work to push the piston to move towards the first combustion chamber and compress the mixed gas in the first combustion chamber, closing the air inlet valve at the first air inlet and closing the air inlet valve at the second air inlet, and igniting the spark plug in the first combustion chamber to enter the next working cycle when the piston reaches the moving end point of the first combustion chamber.
3. The four-stroke engine as claimed in claim 1, wherein a power conversion chamber and an engine shaft are further disposed in the cylinder, a power conversion assembly is disposed in the power conversion chamber, one end of the engine shaft passes through the through hole in the middle of the piston and is fixedly connected to the piston, and the other end of the engine shaft is located in the power conversion chamber and is movably connected to the power conversion assembly to drive the power conversion assembly to operate.
4. The four-stroke engine as recited in claim 3, further including a moving cavity disposed within said cylinder, said working cavity being disposed between said moving cavity and said power conversion cavity, said moving cavity and said power conversion cavity each having a lubricant disposed therein, one end of said engine shaft being disposed within said moving cavity, and both ends of said engine shaft being submerged by said lubricant;
one end of the engine shaft is provided with an oil port A which extends from the oil port A to the depth of the oil port A to the piston to form a second oil passage A, and the other end of the engine shaft is provided with an oil port B which extends from the oil port B to the depth of the oil port B to the piston to form a second oil passage B;
the piston periphery is provided with the recess, in the piston recess both sides be provided with respectively all with first A oil duct and first B oil duct of recess intercommunication, first A oil duct with second A oil duct butt joint intercommunication, first B oil duct with second B oil duct butt joint intercommunication.
5. The four-stroke engine according to claim 4, wherein the cylinder bore is divided into the active chamber, the power chamber, and the power conversion chamber by two partitions, and the engine shaft is slidably coupled to the two partitions by a sliding bearing.
6. The four-stroke engine as recited in claim 4 wherein said working chamber, said piston, and said engine shaft are all cylindrical.
7. The four-stroke engine according to claim 4, wherein the recess is an annular recess.
8. The four-stroke engine according to claim 4, wherein both ends of the piston are provided with an air seal and an oil seal.
9. The four-stroke engine as recited in claim 1, wherein said power conversion assembly comprises:
one end of the connecting rod is hinged with the other end of the engine shaft;
and a connecting rod journal of the crankshaft is movably connected with the other end of the connecting rod and can rotate around the axis of a main shaft of the crankshaft, and the main shaft is connected with a mechanical structure outside the cylinder body.
10. The four-stroke engine as recited in claim 9, wherein said exhaust assembly comprises:
a cam shaft arranged on the cylinder body, a cam arranged on the cam shaft and abutted against the exhaust valve to control the opening and closing of the exhaust valve, an exhaust gear arranged at one end of the cam shaft,
the driving gear is arranged on the main shaft and is driven by the main shaft to rotate;
and a tension wheel which is arranged on the cylinder body, is positioned between the driving gear and the exhaust gear and is close to the exhaust gear, and the driving gear, the tension wheel and the exhaust gear are connected through a connecting belt.
CN202110432113.9A 2021-04-21 2021-04-21 Four-stroke engine Pending CN113074042A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110432113.9A CN113074042A (en) 2021-04-21 2021-04-21 Four-stroke engine

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Application Number Priority Date Filing Date Title
CN202110432113.9A CN113074042A (en) 2021-04-21 2021-04-21 Four-stroke engine

Publications (1)

Publication Number Publication Date
CN113074042A true CN113074042A (en) 2021-07-06

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110432113.9A Pending CN113074042A (en) 2021-04-21 2021-04-21 Four-stroke engine

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2002333583A1 (en) * 2001-09-19 2003-04-01 Federal-Mogul Corporation Closed gallery piston having con rod lubrication
CN1957166A (en) * 2004-03-31 2007-05-02 让-路易斯·马若尔 Double action piston assembly
CN101280722A (en) * 2008-06-03 2008-10-08 赵清涛 Multi-energy source straight shaft hybrid power engine
CN103089424A (en) * 2013-01-21 2013-05-08 洪子鑫 Double-piston type vertical four-stroke engine
CN105275532A (en) * 2015-10-28 2016-01-27 北京理工大学 Pressure lubrication system of multi-module free piston internal combustion engine generator
CN107489519A (en) * 2016-08-18 2017-12-19 宝沃汽车(中国)有限公司 A kind of automobile, engine and acting device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2002333583A1 (en) * 2001-09-19 2003-04-01 Federal-Mogul Corporation Closed gallery piston having con rod lubrication
CN1957166A (en) * 2004-03-31 2007-05-02 让-路易斯·马若尔 Double action piston assembly
CN101280722A (en) * 2008-06-03 2008-10-08 赵清涛 Multi-energy source straight shaft hybrid power engine
CN103089424A (en) * 2013-01-21 2013-05-08 洪子鑫 Double-piston type vertical four-stroke engine
CN105275532A (en) * 2015-10-28 2016-01-27 北京理工大学 Pressure lubrication system of multi-module free piston internal combustion engine generator
CN107489519A (en) * 2016-08-18 2017-12-19 宝沃汽车(中国)有限公司 A kind of automobile, engine and acting device

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